Planet Hunters Talk

C13 K2 finds

  • ajamyajax by ajamyajax

    Well, a number of new c13 transit candidates from the raw cadence data to sort from PC to binary, as well as a host of other interesting targets.

    Many are obvious binaries, will post more on all of these when possible:

    c13 preview1

    c13 preview1

    c13 preview1

    New transit candidates

    210784722

    210877371

    210664191

    210886951

    210943946

    210545633

    246757401

    246788829

    246815557

    246821700

    246887507

    246742424

    246951358

    246772586

    210761888

    246644176

    246671003

    246703608

    246727022

    210761888

    246991396

    247235876

    247332572

    246962810

    246991396

    246891964

    246856197

    210664740

    246771958

    246777408

    246819180

    246787971

    246836638

    246839140

    210513593

    210664740

    210798162

    246942724

    246789528

    247142909

    246721401

    246965621

    246924635

    246820469

    246821700

    246813459

    246820469

    246821700

    210924194

    246927880

    246991571

    247004558

    246991839

    247061897

    247100764

    247089969

    247118656

    247128499

    247147539

    247156282

    247218695

    247220933

    247230905

    247240894

    247247699

    247249467

    247252399

    247270368

    247286869

    247301111

    247306365

    247309641

    247310117

    247311144

    247311454

    247313195

    247314025

    247318064

    247324260

    247324842

    247353120

    247366272

    247368081

    247379670

    247382312

    247399034

    247417699

    242422788

    247430400

    247446791

    247449254

    247451445

    247452637

    247487809

    247491521

    247505435

    247511742

    247513856

    247529791

    247550048

    247590385

    247595235

    247605441

    247605507

    247691784

    247704378

    247706281

    247729177

    247745384

    247759950

    247766677

    247768417

    247807603

    247818792

    247857331

    247904264

    247943853

    247959327

    248014667

    248097630

    248139290

    248189363

    248212342

    248238650

    210689309

    210869195

    246746069

    246845309

    247231738

    247242188

    247242432

    247323832

    247467912

    247510777

    247582366

    247609501

    247634301

    247731516

    247761099

    247827671

    247897562

    247919403

    247984869

    210909625

    247131913

    247166577

    247274953

    247376860

    247609072

    247742862

    247817953

    247985084

    247008756

    247227677

    247106666

    247212019

    247516233

    210700847

    246697679

    246718029

    246732631

    246781744

    246782263

    246845151

    246900928

    246942563

    246942693

    247103541

    247107215

    247111888

    247167665

    247213144

    247237201

    247712502

    247251045

    247297940

    247331497

    247422788

    247441117

    247494748

    247544666

    247702571

    247461921

    247594337

    247605507

    247856151

    247642965

    247671659

    247794636

    247795097

    247805533

    247761099

    247924036

    248241854

    210779706

    247294687

    247340158

    247558369

    247583818

    247585700

    247805410

    sso/flare/microlens candidates

    246697776 (2991.91)

    246798563 (2991.91)

    246778652 (2990.71)

    246833620 (2987.6)

    246968554 (2994.2)

    247007140 (2994.48)

    247011057 (2991.23)

    cepheids?

    246742340

    246791024

    246802680

    247159284

    247454835

    247583818

    247622877

    247822311

    247888948

    248145565

    rrlyrae

    246785473

    246851302

    247050596

    247126197

    maybe delta scuti

    246789223

    246876496

    247566375


    And grateful acknowledgements which make our amateur astronomy research possible here:

    "This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program."

    "Some or all of the data presented in this research were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts."

    Posted

  • zoo3hans by zoo3hans

    Ok, I try to contribute if possible:

    PC candidates

    EPIC 210910807 transit at BKJD 2991.37695, duration 3.9 hours, depth 0.0059

    EPIC 210921856, maybe transit at BKJD 2990.866, duration 3.9 hours, depth 0.0016

    EPIC 210927096 P=1.455 days, starting at BKJD 2988.16, duration 3 hours, depth 0.0018, rather V-shaped though

    EPIC 210652599 maybe transit at BKJD 2992.27, duration 9.8 hours, depth 0.0026

    EB candidates

    EPIC 210941830 maybe EB with P=4.80 days, primary eclipses at BKJD 2987.9645 and 2992.75625, secondary at 2990.68225

    EPIC 210943946 EB with P=0.6673 days , EPIC mentioned by Mark

    EPIC 210664740 P=0.4146 days

    RR_Lyrae

    EPIC 210934522

    Other

    EPIC 210902967 interesting peak at BKJD 2992.378, duration 9.8 hours, maybe solar system object

    EPIC 210932700 interesting double peak at BKJD 2990.68, duration 7.8 hours, maybe solar system object

    EPIC 210946381 interesting peak at BKJD 2988.6184, duration 3.9 hours, maybe solar system object

    Posted

  • ajamyajax by ajamyajax in response to zoo3hans's comment.

    Re 210932700 from Hans Martin's list: indeed, the SSO candidate at 2990.68 appears be a 6km wide asteroid known as 3573-Holmberg. It has even been 3D modeled (see link below). Just amazing stuff.

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    210932700 , 2MASS J04251002+2154278 , 12.664 , 12.159 , 12.042 , 0.505 , 0.117 , ('K3V', 0.81) , ('K3V',0.81)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    210932700 66.2918 21.9077 0.0 14.556 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist

    210932700,2MASS J04251002+2154278,66.291779,21.907705,,,,14.556,90.600,-0.900,

    Aliases

    WISE J042510.07+215427.2


    210932700, mid , Holmberg , 3573, MB>Inner , 16.0 ,http://vizier.u-strasbg.fr/cgi-bin/VizieR-5?-source=B/astorb/astorb&Name===Holmberg, 0.014 ,5.125

    K2ephem ephemeris for Holmberg from JPL/Horizons...

    Object 'Holmberg' is visible in C7 (mag 16.6..17.9; 1.4..50.8"/h; ra 281.082..297.027; dec -20.976..-18.883).

    Object 'Holmberg' is visible in C13 (mag 16.1..17.4; 4.7..55.9"/h; ra 66.257..85.610; dec 21.514..22.098).

    Note K2ephem package courtesy of the Kepler/K2 guest office lead Dr. Geert Barentsen.


    https://space.frieger.com/asteroids/asteroids/3573-Holmberg

    Posted

  • zoo3hans by zoo3hans in response to ajamyajax's comment.

    Dear Mark

    so far I think I can confirm:

    246727022 HJ P=3.1059 days

    246787971 EB P=0.72 days

    246789528 PC or EB P=1.5327 days

    247235876 PC P=2.9831 days

    247323832 EB P=1.9209 days

    247451445 EB P=1.6142 days

    247550048 MPC P1=0.875 days, P2=0.49035 days

    247704378 EB P=5.639 days

    248212342 EB P=2.985 days

    Posted

  • ajamyajax by ajamyajax in response to zoo3hans's comment.

    Dear Hans Martin,

    Thanks for having a look. The T-Tauri light curves in c13 might also interest you and others. This just an early look, but LkCa 15 (EPIC 247520207) shown below is most impressive:

    "The Campaign 13 target list includes 21,434 standard long cadence and 109 standard short cadence targets, located towards the constellation of Taurus in the Galactic Anti-Center direction.

    Notable targets include:

    members of the Taurus star-forming region including two well-known T Tauri-type stars:

    HL Tau (EPIC 210690913);

    LkCa 15 (EPIC 247520207);

    the nearby Hyades open cluster;

    the distant clusters NGC 1647, NGC 1746 and NGC 1817;

    33 galaxies;

    6 Trojan asteroids;

    8 Trans-Neptunian Objects (TNOs);

    1 Comet (246P/NEAT).

    Moreover, a total of 33 bright stars (Kp 0-6), including Aldebaran and more than 15 members of the Hyades, are being observed using a custom 40-pixel diameter circular aperture mask. Such circular masks capture the PSF cores while excluding the long saturation columns which tend to bleed off silicon. Nine bright Hyades members are also being observed in short cadence using a similar custom mask."

    From: https://keplergo.arc.nasa.gov/k2-approved-programs.html

    TT1

    Posted

  • ajamyajax by ajamyajax

    Re 247642965 from our c13 list: could be a blended binary, but interesting because the light curve does not seem like the small dwarf indicated by the colors listed. There is a bright visual neighbor as shown from Aladin Lite however.

    s1=2988.2 p1=0.87051 d1=0.075 (1.8 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247642965 , 2MASS J04564723+2317225 , 11.188 , 10.528 , 10.284 , 0.66 , 0.244 , ('M7V', 0.098) , ('M2V',0.5)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247642965 74.1969 23.2895 0.0 13.579 13

    247646165 74.2109 23.313 96.52 14.716 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist

    247642965,2MASS J04564723+2317225,74.196869,23.289545,,,,13.579,41.400,-12.600,

    Aliases

    WISE J045647.27+231722.3

    Programs:

    GO13049_LC: Quintana Discovery and Vetting of K2 Exoplanets

    https://keplergo.arc.nasa.gov/data/k2-programs/GO13049.txt

    GO13050_LC: Burke K2 Exoplanet Ecliptic Survey - KEES

    https://keplergo.arc.nasa.gov/data/k2-programs/GO13050.txt

    T1
    F1
    AL1

    Posted

  • Dolorous_Edd by Dolorous_Edd

    From Andrew's data in Bold


    247103541 - strange non-periodic dips; YSO? also mentioned by Mark; HD 285893 -- T Tau-type Star

    247915986 - SSO at 3013.55; ~15h; seems to be Desnoux

    210690892 - strange LC ; looooooonggg dip at 3008.45, Natural? 644h if real; seems to be V* XZ Tau -- T Tau-type Star

    246800096 - spike at 3002.445 ; ~33h ; SSO ?

    246855544 - I am keep seeing this feature at 3064.45. from what SSO it is ? same as 246859453, 246869370, 246885610

    246967310 - spike at 3030.68

    246974789 - maybe SSO at 2997.80

    247112683 - sso at 3029.03

    247167923 - at 2999.91; 12.2h

    247195834 - at 3006.60; 8.8h

    247297216 - maybe SSO at 3006.01

    247314766 - SSO at 3007.82

    247315923 - SSO at 3013.79

    247327181 - maybe SSO at 3028.14

    247380881 - maybe SSO at 2999.03

    247648446 - maybe SSO at 3002.23

    210935308 - SSO at 3001.19; 11h

    247364630 - SSO at 3007.2


    PC

    247956487 - period 35.357; depth ~1.2% ; duration 11.278

    247832592

    247548566 - period 3.488; depth ~2%

    247456778 - period 30.550 ; depth ~0.0002 ; duration 8.8

    247455360 - single dip at 3027.42; depth ~0.0003 ; duration 7,8h

    247450113 - single dip at 3003.457

    247429394 - maybe dips at 3027.84 and 2994.5

    247427432 - maybe transits at 2989.07 and 3027.48

    247418783 - period 2.226; duration 1.987; depth 0.0003; possible hot SE around bright star? additional dip at 3024.48

    247409339 - single dip at 3045.8, maybe repeat at 2988.62 ; period 57.238

    247364781 - maybe transit 3024.2; maybe period 9.632

    247363044 - period 3.627; duration 2.418 ; depth 0.006

    247351823 - maybe transits at 2990.88 and 3024.63.

    247335861 - period 0.797

    247323795 - period 2.057

    247320366 - maybe single dip at 3064.34

    247310581 - period 16.570; depth 0.0008 ; duration 2.456

    247309123 - period 2.056; depth 0.0005; duration 6.069

    247308273 - maybe single dip at 3028.50

    247306158 - single dip at 3043.66

    247300197 - maybe single dip at 2993.32

    247281516 - period 6.588; depth ~1.5%; secondary visible maybe EB

    247267267 - period 4.795; depth 0.002; duration 2.498

    247264249 - multiple single dot dips? ??

    247262632 - Not EB as I mentioned , but looks like PC in new data; period 20.44; depth ~0.004; duration 10.78

    247260946 - period 1.718d contamination

    247258644 - period 1.718d contamination

    247256755 - period 1.718d contamination

    247256573 - period 1.718d ; depth ~1% ; duration 5.88; V-shaped

    247256021 - period 1.718d contamination

    247249645 - period 1.718 contamination

    247248664 - period 1.718 contamination

    247246983 - period 1.718 contamination

    247238391 - maybe dips at 3001.9044 and 3023.16

    247234505 - possible PC with 2 transits? see 2994.926 and 3059.73? period ~64d ; depth ~0.0003?

    247212614 - period 12.581; depth ~2% ; duration 5.392800; probably contamination from 247212865

    247197925 - maybe single, long dip at 3031.98 ; duration 34.81

    247183003 - single dip at 3023.56; depth 0.002; duration 7.84

    247178163 - period 22.552; depth ~1.5%; duration 4.41h

    247164043 - maybe MPC? Period 1 = 5.229 , start at 2998.94; P2?? dips at 2998.94 and 3009.014 and 3054.38 and 3028.7824

    247142564 - D - period 10.9 - MPC ?? EB?? dips at 3008.310 and 3016.81 and 3032.78 and 3047.334900 / period 2 = 38.831?

    247111550 - period 9.356; depth ~1,2%; duration 3.92

    247098679 - period 12.923 ; depth ; duration ; me think s EB

    247098361 - period 11.162; depth ~1%; duration 5.798; agree could be hot gas giant instead

    247051221 - period 21.1; second pair of transits with same period I think eccentric EB

    247047370 - period 4.205; depth 0.0005 ;duration 1.570 + spots

    247028425 - could actually be a hot gas giant; period 1.382 ; depth ~1%

    246953392 - period 25.770; depth 0.0015 ; duration 5.39; period 2 = 1.852 ??

    246931769 - period 13.716;

    246920193 - period 10.192; depth 0.0003; duration 2.94

    246911830 - possible HJ candidate; period 2.625 ; depth ~1% ; duration 3.92

    246896312 - maybe MPC or EB contamination; dips at 3002.73 ; 3020.10 ; 3048.93 ; 3066.40

    246891819 - MPC; period 1 = 8.941; period 2 = 4.806; period 3 = 16.431;

    246877090 - maybe single dip at 3038.40

    246876040 - period 5.096 ; depth ~0.0007; duration 2.45h

    246865365 - period 3.387

    246865183 - period 3.388; depth 0.005 duration 3.634

    246860357 - transit signature from 2 bodies; with equal period ~13.105; contamination from EB?

    246851721 - maybe hot gas giant candidate; pariod 6.179; depth 0.006; duration 4.41h

    246851148 -period 18.890; depth 0.0015; suration 3.98

    246798444 - period 1.1 ; transits only in the first part of the LC

    246754348 - maybe dips at 3018.56 and 3038.45

    246751480 - single dip at 2995.20; duration 8.8h

    246717245 - single dip at 3062.10; duration 9.31h

    246712205 - period 3.562 ; 2% depth dips; I think EB

    246697679 - period maybe 14.8; or half of that; start at 2999.24 ; from Mark's list

    246693322 - period 22.567; start at 3006.56; second period 22.542; start at 2992.69; maybe EB

    246686657 - period 4.418 ; duration 2.94; maybe contamination from EB; there are dips in between

    246628376 - period 4.546;

    210936044 - period 1.422 ( or 2.8 if EB )

    210911405 - period 22.281; depth 0.0001; duration 12.7

    210860015 - 2 dips at 2998.55 and 3033.19

    210816335 - period 4.550 ; depth ~1% ; duration 2.45h; likely EB though; second dip at 2998.56 and 3046.301 ??

    210897587 - possible MPC; period 1 = 6.343 start at 2992.06; period 2 = 13.845; start at 2995.43; period 3 = 40.670

    210888483 - period 10.840; depth 0.002 ; duration 6.254

    210797580 - period 2.141; start at 2991.33

    210757702 - maybe 2 transits; period 42.43 ; at 3022.89 and 3065.33


    EB

    247920681 - D - period 38.750

    247913844 - C -

    247909155 - D - period 3.482

    247863996

    247851007

    247827671 - from Mark's list

    247826397 - D

    247818792 - from Mark's list

    247818626 - D -

    247817953 - from Mark's list

    247807603 - from Mark's list

    247805533 - from Mark's list

    247732055 - D - period 67.88

    247683272 - maybe single dip at 3024.83

    247679406 - maybe single dip at 3024.83

    247676031 - D - period 35.38

    247672517 - C - period 0.534

    247669595 - SD - period 0.665

    247650711 - maybe contact EB

    247640158 - D - period 30.229

    247634849 - D - period unknown ; primary & secondary visible at 3004.14 and 3023.41

    247634812 - C - period 0.325

    247634301 - SD - period 1.100; from Mark's list

    247625497 - SD - period 1.7; contamination?

    247622877 - maybe contact EB?

    247620001 - maybe HB? period 11.115

    247615963 - SD - period 1.769 ; contamination

    247612547 - SD - period 1.769; likely contaminates nearby EPIC's

    247610055 - SD - period 1.769 ; contamination

    247609072 - D - period 18.9; from Mark's list ; likely D + DSCT

    247606731 - SD - period 1.767 ; contamination

    247606591 - period 1.767 ; contamination

    247605507 - C - period 1 from Mark's list

    247605441 - SD - period 1.653; from Mark's list

    247595998 - D - period 11.139

    247576642 - D - period 6.96; D + HB?

    247595235 - C - period 0.4; from Mark's list

    247593301 - SD - period 0.848

    247590841 - C - period 0.265

    247590385 - SD - period 2.347

    247570196 - C - period 0.674

    247567228 - C - period 0.766

    247566342 - D - period 17.393; D + DSCT or something similiar

    247558807 - D - period 20

    247558369 - maybe C EB. from Mark's list

    247556609 - D - period 13.902

    247555614 - HB - period 35

    247554980 - C - period 0.524

    247554469 - SD - period 0.947

    247553546 - D - period 8.45

    247551121 - eclipse at 2996.94

    247541798 - C - period 0.566

    247539853 - D - period 3.020

    247539356 - D - single eclipse visible at 2996.93; shape is very wierd ; processing issue?

    247537809 - HB - period 7.596

    247533047 - C - period 0.856

    247530417 - C - period 0.347

    247529791 - D - period 1.967; from Mark's list

    247523984 - D - period 38.933

    247516233 - C - period 0.367; from Mark's list

    247513856 - SD - period 0.784; from Mark's list

    247511742 - De - period 12.733; from Mark's list; third body at 2988.36 and 3066.08 ??

    247510777 - D - period 12.438; from Mark's list

    247507384 - C - period 0.6

    247505435 - C - period 0.360; from Mark's list

    247500341 - SD - period 3.931

    247500193 - possible triple ?? D+C ? or D + spots? period 1 = 2; period 2 = 1.9

    247497352 - SD - period 1.7

    247494748 - C - period 0,280; from Mark's list

    247493630 - D - period 23.512;

    247491521 - SD - period 0.512; from Mark's list

    247487809 - D - period 18.910; from Mark's list

    247484770 - HB - period 9.708

    247484471 - SD - period 3.523

    247480808 - SD - period 1.836

    247476672 - D - period 2.333

    247476160 - D - period 10.190

    247461921 - D - period 18; from Mark's list

    247460814 - SD? - period 1.153

    247455766 - SD - period 1.577

    247449254 - D - period 16.577; from Mark's list

    247441117 - C - period 0.342

    247430400 - C - period 0.244; from Mark's list

    247426435 - D - period 6.135

    247422788 - C - period 0.3; from Mark's list

    247419510 - SD - period 1.434

    247417699 - C - period 1.355; from Mark's list

    247409030 - SD - period 2.757

    247408140 - C - period 1d

    247399034 - SD - period 0.935; from Mark's list

    247395278 - D - period 9.415; contamination I think

    247394976 - D - period 9.427

    247394011 - D - period unknown ; eclipse at 3027.4; secondary at 3023.20

    247393705 - possible triple; C + D or DSCT + D; single eclipse at 3027.403

    247384716 - C - period 0.35

    247382312 - De - period 4; from Mark's list

    247379670 - C - period 0.280; from Mark's list

    247376860 - С - period 0.3; from Mark's list

    247375720 - SD - period 2.475

    247368081 - SD - period 0.572; from Mark's list

    247366272 - C - period 0.420 ; from Mark's list

    247365042 - D - 2 eclipses visible 3002.80 and 3044.49

    247360583 - maybe contact binary

    247353120 - D - period 14.211

    247349849 - maybe HB interesting shape; period 13d

    247343526 - C - period 0.7

    247339063 - C - period 0.4

    247338940 - C - period 0.4

    247332572 - D - period 34.622 ; from Mark's list ; third body dips at 3058.214200 and 3062.596800

    247331497 - C - period 0.320 ; from Mark's list

    247324842 - SD - period 1.144

    247324260 - SD - period 2.913 ; from Mark's list

    247323832 - SD - period 1.918; from Mark's / Hans list

    247320872 - D - period 24.660

    247318064 - C - period 0.280; from Mark's list

    247314025 - SD - period 1.329; from Mark's list

    247313195 - SD - period 4.126; from Mark's list

    247311454 - SD - period 1.57; from Mark's list

    247311144 - SD - period 1.868; from Mark's list

    247310117 - SD - period 2; from Mark's list

    247309641 - C - period 0.7d from Mark's list

    247306365 - C - period 0.3; from Mark's list

    247305762 - likely triple EB or simply EB; period 1 = 3.800 ; period 2 = ~4; C + D ? ; or D + spots ??

    247301868 - C - period 0.348

    247301111 - C - period 0.640; from Mark's list

    247297940 - SD - period 5.282; some of the eclipses have wierd shape see 3002.773250;3010.486350; 3021.110850; 3026.341350 from Mark's list

    247294687 - D - period 42.692; from Mark's list

    247289468 - SD - period 0.291

    247286869 - SD - period 1.165; from Mark's list

    247286760 - C - period 0.460

    247282757 - C - period 0.280

    247281516 - D - period 6.775

    247274953 - De - period 11.412 ; D + HB feature ? ; from Mark's list

    247270368 - SD - period 1.067; from Mark's list

    247269360 - C - maybe contact EB - period ~0.5

    247263093 - D - period 9.712

    247262632 - D - maybe EB with 20.5d period ; start 3017.64

    247253928 - D - period 1.720

    247253678 - SD - period 1.718

    247253111 - D - period 22.522

    247252399 - D - period 12.596; + spots? shape of the eclipses look interesting ; from Mark's list

    247249467 - De - period 25.346; from Mark's list

    247246911 - maybe contacta EB

    247244529 - SD - period 0.760

    247242432 - SD - period 0.740; from Mark's list

    247241291 - D - period 2.472

    247240894 - C - period 0.260; from Mark's list

    247235876 - D - period 2.986; from Mark's / Hans list

    247230905 - D - period 3.763; from Mark's list

    247226616 - SD - period 2.420

    247220970 - D - period 21.893

    247220933 - De - period 45.788; from Mark's list

    247220706 - SD - period 1.123

    247219225 - SD - period 0.678

    247218695 - D - period 1.965; from Mark's list

    247213144 - interesting system, possible triple C + D ; period 0.748 ; period 2 = 26.061 . or it is D + spots ? from Mark's list

    247212865 - D - period 12.595; depth 5%

    247199882 - D - period 6.9

    247189048 - SD - period 2.871

    247198747 - HB - period 7

    247171886 - HB - period 5.141

    247171017 - C - period 0.286

    247167665 - SD - period 1.742 ; from Mark's list

    247162706 - D - period 2.08

    247162140 - SD - period 2.734

    247160645 - C - period 1.2

    247158135 - C - period 0.7

    247156282 - C - period 0.346 ;from Mark's list

    247153621 - C - period 0.915

    247147539 - SD - period 1.372 ; from Mark's list

    247146176 - SD - period 1.308

    247142909 - SD - period 1.996 from Mark's list

    247132873 - D - period 3.481

    247131913 - De - period 26.7; from Mark's list

    247128499 - C - period 0.7; from Mark's list

    247118656 - C - period 0.5; from Mark's list

    247111888 - D - period 8.7d; from Mark's list; third body at 3036.05 ??

    247110945 - D - single dip at 3019.894

    247108931 - C - period 0.4

    247106666 - SD - period 4.898; from Mark's list

    247105085 - C - period 0.9

    247100764 - D - period 3.982; from Mark's list

    247098967 - D - period 12.919

    247098361 - D - period 11.144

    247089969 - C from Mark's list

    247085413 - SD - period 2.421

    247072023 - HB - period 5.450

    247070019 - C - period 0.5

    247061897 - SD - period 2.054

    247061553 - C - period 0.46

    247051137 - D - period 21.142

    247028425 - D - period 1.382

    247015294 - D - period unknown - single eclipse at 2997.80

    247008756 - C - period 0.265 from Mark's list

    247004558 - SD - period 1.275 from Mark's list

    246991571 - C - 0.240 from Mark's list

    246991396 - D - period 4.683 from Mark's list

    246982990 - D - period 52.336

    246965621 - SD - period 1.958 ; from Mark's list

    246962810 - SD - period 1.233 from Mark's list

    246956277 - maybe contact EB

    246951358 - D - period 38.974 from Mark's list ; third body dips at 2993.33 and 3050.59??

    246946219 - SD - period 2.261

    246942693 - SD - period 3.253; from Mark's list

    246927880 - SD - period 0.8; from Mark's list

    246924635 - SD - period 0.789; from Mark's list

    246985284 - 2991.024200 and 3008.54

    246981318 - HB for sure; period 31.5

    246978459 - SD - period 0.256; EB with spots

    246923180 - D - period 2.047

    246913261 - D - period unknown; single eclipse at 3042.870

    246906509 - SD - period 2.319

    246906371 - D - single dip at 2994.92

    246901480 - SD - period 1.162

    246901174 - maybe contact EB

    246899433 - D - period 13.148

    246899376 - D - period 2.207

    246898790 - maybe contact EB

    246898423 - D - period 7.125

    246897707 - maybe HB - period 4.720

    246891964 - D - period 30.413; from Mark's list

    246887507 - D - period 11.450; from Mark's list

    246887076 - maybe contact EB

    246886940 - maybe single dip at 3064.415

    246886747 - D - period 7.790

    246868553 - maybe HB - period 4.991

    246861547 - C - maybe contact EB - period 0.928

    246860670 - C - maybe contact EB

    246859790 - what is this? EB + thrid body? see 2991.53 and 3008.64 and 3037.598???

    246858642 - C - maybe contact EB ; period 0.240

    246851649 - SD - period 3.495

    246849982 - D - period unknown; single eclipse at 3061.13

    246849405 - maybe contact EB

    246847234 - ???? sort of HB? strange rises with interesting shape; period 1.562

    246846293 - D - period 8.56

    246845529 - ???? sort of HB? strange rises with interesting shape; period 2.756

    246845309 - D - period 34.137; from Mark's list

    246835517 - D - period unknown ; single eclipse at 3026.6

    246821700 - C - period 0.4; from Mark's list

    246820469 - C - period 0.446; from Mark's list

    246819180 - D - period 4.444; from Mark's list

    246815557 - SD - period 1.106

    246813459 - SD - period 0.658

    246805854 - C - period 0.320

    246798394 - D - period 8.825

    246789528 - SD - period 1.531; from Mark's / Hans list

    246789347 - C - period 0.368

    246789174 - SD - period 1.875

    246788829 - De - period 4.648; from Mark's list;

    246782263 - D - period 19.083

    246782251 - maybe HB? - period 0.620

    246777408 - SD - period 2.466; from Mark's list

    246772586 - C - period 0.347

    246770778 - D - single eclipse at 3039.68

    246769933 - D - period 3.935

    246768454 - D - period 3.541

    246757401 - SD - period 1.078; from Mark's list

    246754298 - maybe contact EB

    246746614 - maybe single eclipse at 3026.66

    246746069 - D - period 39.178; from Mark's list

    246742424 - D - period 16.420; from Mark's list

    246732631 - D - period unknown; primary and secondary eclipses visible; from Mark's list

    246727022 - D - period 3.098; from Mark's list

    246721401 - SD - period 0.742; from Mark's list

    246721398 - D - period 3.047 ; from Mark's list

    246718029 - D - period 17.730; from Mark's list

    246717362 - SD- period 0.280

    246715531 - SD - period 2.107

    246703608 - D - period 2.296

    246698204 - dips are buried in noise, but they are here; period ~14.790; start 2999.22; maybe contaminate 246697679

    246696755 - D - single eclipse at 3022.57; same as 246696483

    246696483 - D - single eclipse at 3022.57

    246694716 - HB - period 27 ; same LC as 246694710

    246694710 - HB - period 27

    246685919 - maybe contact EB

    246683636 - maybe contact EB

    246682490 - SD - period 0.43; with spots;

    246644176 - SD - period 0.995

    246643313 - C - period ~1

    246630315 - D - period 6.15

    246608860 - C - period 0.520

    210943946 - C - period 0.6673; from Hans / Mark list

    210941830 - D - period 4.80; from Hans list

    210927096 - SD - period 2.910; from Hans list; mentioned as PC

    210910807 - D - period 11.396; from Hans list; mentioned as PC

    210893902 - C - period 0.240

    210879314 - D - period 3.272

    210876370 - C - period 0.280

    210874496 - D - period 0.847

    210869195 - D - period 55.544

    210857590 - SD - period 0.529

    210815403 - SD - period 0.821

    210784722 - SD - period 0.852

    210779706 - D - from our C4K2 list and C4-C13 overlap list; period ~0.64

    210761888 - D - from Mark's list ; period 31.478

    210739713 - from our C4K2 list and C4-C13 overlap list; period ~0.64

    210734262 - from our C4K2 list and C4-C13 overlap list; period ~9.636

    210664740 - from our C4K2 list and C4-C13 overlap list; period ~0.41

    210650598 - HB - period 11.1

    210642322 - from our C4K2 list and C4-C13 overlap list; period ~4.4


    Other

    247492811 - maybe transits at 2993.53 and 3052.380 period 58.8

    247483756 - maybe dip at 3038.38

    247457898 - single dip at 3038.41

    247452456 - maybe dips at 3036.64 and 3050.48

    247443405 - maybe dips 3020.425950 and 3043.728150

    247437541 - maybe dip at 2998.042550

    247432728 - maybe dips at 3008.79 and 3035.96

    247425605 - single dip at 3038.38

    247413024 - maybe dips at 3022.560850 and 3038.395350

    247347964 - single dip at 3002.129100

    247337843

    247328152 - single dip at 3019.823

    247273263 - again strange dip at 3047.60; this time 200h

    247269622 - agree with Hans, strange dip at 3044.06; 130h

    247142950 - dips along the LC maybe T tauri star

    247139917 - maybe 3064.773

    247019758 - dips at 3010.74 and 3016.43 and 3031.25 and 3038.323

    246979298 - single dip at 2991.18

    246978880 - single dip at 3041.623400

    246925324 - outbursts DN?

    246661932 - increase in flux in the end

    210841929 - maybe single dip at 3038.41

    210732813 - maybe single dip at 2995.79

    247589612 dips along the LC maybe T tauri star

    247350654 - funny shape

    247303901- periodic variable

    247297940 - processing issue

    247165221 - transit at 2997.80

    247078342 dips along the LC maybe T tauri star

    246989752 dips along the LC maybe T tauri star

    246960733 - dip at 3016.145

    246942563 - dips along the LC maybe T tauri star

    246929818 - dips along the LC maybe T tauri star

    246865433 - maybe single dip at 2997.8

    246818039 - what happens at the end

    246809048 - spike at 3065.47

    246707227 - sort of outburst at 3009.04

    246698062 - Mira , but take a look at flux! it almost down to zero at some point

    247034456 - outbursts ? is it DN?

    246786860 - GDOR?

    246754774 - periodic variable

    247273337 - is that a dip at the beggining? at 2989.96 ?

    246997643 - spots?

    246980868 - a Mira with outburst at 2991.82 ????

    246925324 - strange outbursts along the LC

    246868553 - periodic variable

    210727454 - outburst at 3036.34 ?


    RR Lyr

    210862813 - RR Lyr with dips? see 2994.83 and 2996.54 and 3031.18 and 3031.95

    Posted

  • zoo3hans by zoo3hans

    From MAST K2_C13 data (as usual I start frpm the last one):

    PC candidates

    210816335 P=4.5484 days, starting at BKJD 2988.04, duration 3.5 hours, depth 0.0084, mentioned by Ivan as a likely EB

    210879314 P=3.272 days, starting at BKJD 2989.94, duration 3.5 hours, depth 0.034, mentioned by Ivan as an EB, but why not a HJ?

    246698204 P=14.809 days, starting at BKJD 2999.19, duration 10.3 hours, depth 0.028, U-shaped, mentioned by Ivan as an EB which could also be possible of course

    246712205 P=3.562 days, starting at BKJD 2989.12, duration 4.9 hours, depth 0.0192, U-shaped, mentioned by Ivan as a possible EB

    246790916 P=12.971 days, starting at BKJD 2998.01, duration 18.6 hours, depth 0.0041, but could be EB instead with alternating durations of about 18 h and 13 h.

    246851721 P=6.1814 days, starting at BKJD 2988.84, duration 4.4 hours, depth 0.057, U-shaped, good candidate, mentioned by Ivan, maybe P2=1.1556 days, starting at BKJD 2989.40, duration 8.3 hours, depth 0.0003, P3=0.5778 days, starting at BKJD 2988.51, duration 4.9 hours, depth 0.0004, now the Jupiter-like planet is confirmed in https://arxiv.org/abs/1807.10298

    246865365 P=3.3857 days, starting at BKJD 2990.22, duration 4 hours, depth 0.0069, good candidate, mentioned by Ivan

    246911830 P=2.6267 days, starting at BKJD 2987.74, duration 4.5 hours, depth 0.0103, U-shaped, good candidate, mentioned by Ivan, now confirmed in https://arxiv.org/abs/1806.06099

    246931769 P=13.185 days, starting at BKJD 2988.0, duration 7.4 hours, depth 0.0022, very U-shaped, mentioned by Ivan but with a wrong period

    246947582 P=21.374 days, starting at BKJD 2991.635, duration 6.4 hours, depth 0.02, U-shaped

    246953392 probably MPC, P1=25.768 days, starting at BKJD 2996.41, duration 5.4 hours, depth 0.0012, P2=0.6739 days, starting at BKJD 2987.96, duration 2,5 hours, depth 0.0005 P3=5.864 days, starting at BKJD 2987.78, duration 3 hours, depth 0.0006, mentioned by Ivan

    246982507 maybe single transit at BKJD 3008.25, duration 57.4 hours, depth 0.031

    247098361 P=11.162 days, starting at BKJD 2992.37, duration 5.4 hours, depth 0.0081, U-shaped, mentioned by Ivan as an EB

    247142564 P=10.915 days, starting at BKJD 2995.90, duration 4 hours, depth 0.0058, mentioned by Ivan as a MPC or EB

    247178163 P=22.552 days, starting at BKJD 3004.85, duration 3.5 hours, depth 0.0123, nicely U-shaped, good candidate, mentioned by Ivan

    247212865 P=12.59945 days, starting at BKJD 2991.80, duration 6.4 hours, depth 0.048, U-shaped, mentioned by Ivan as an EB with a period of 37.768 days

    247249114 maybe single transit at 3024.03, duration 41.2 hours, depth 0.0048

    247252399 P=12.603 days, starting at BKJD 2989.35, duration 6.8 hours, depth 0.024, mentioned by Mark and Ivan (who thinks it's an EB)

    247253111 P=22.59 days, starting at BKJD 2995.30, duration 5.9 hours, depth 0.0189, V-shaped, mentioned by Ivan as an EB, but with a somewhat wrong period

    247256573 P=1.718 days, starting at BKJD 2988.22, duration 6.4 hours, depth 0.0085, mentioned by Ivan

    247312643 P=17.29 days, starting at BKJD 3002.71, duration 8.3 hours, depth 0.0007

    247321442 P=15.839 days, starting at BKJD 2992.66, duration 6.4 days, depth 0.0005

    247365042 P=41.68 days, starting at BKJD 3002.82, duration 11.5 hours, depth 0.022, U-shaped, mentioned as an EB candidate by Ivan

    247450113 single transit at BKJD 3003.52, duration 13.7 hours, depth 0.0029, U-shaped, mentioned by Ivan

    247450298 maybe single transit at BKJD 3011.855, duration 12.75 hours, depth 0.0015

    247455816 up to 7 periods are found by the BLS routine of the latest LcViewer, P1=17.659 days, starting at BKJD 2989.16, duration 10.3 hours, depth 0.0006, P2=30.455 days, starting at BKJD 2989.14, duration 11.3 hours, depth 0.0012, P3=38.975 days, starting at BKJD 2990.65, duration 10.3 days, depth 0.0013, P4=51.1685 days, starting at BKJD 2994.71, duration 11.3 hours, depth 0.0013, but according to Mark it's probably a software problem

    247477006 P=0.56256 days, starting at BKJD 2987.97, duration 3 hours, depth 0.0195, it looks more like an EB though

    247483356 transit1 at BKJD 2997.205, duration 14.7 hours,depth 0.0072, transit2 at BKJD 3043.534, duration 14,2 hours, depth 0.0032, mabye contamination by a BGEB

    247548566 P=3.4876 days, starting at BKJD 2988.165, duration 4.0 hours, depth 0.0197, mentioned by Ivan

    247569477 P1=13.10586 days, starting at BKJD 2998.88, duration 24,5 hours, depth 0.0012, P2=unknown, at BKJD 3031.02, duration 39.2 hours, depth 0.00058

    247576642 P=6.9658 days, starting at BKJD 2992.07, duration 3.5 hours, depth 0.0045, from the shape of the LC it could also be contamination by a BGEB

    247580012 P=3.974 days, starting at BKJD 2990.68, duration 8.8 hours, depth 0.004

    247589423 P=17.31 days, starting at 2997.02, duration 3.9 hours, depth 0.0021, now confirmed with 3 planets in https://arxiv.org/pdf/1710.07203.pdf

    247598580 P=21.193 days, starting at BKJD 3008.37, duration 3 hours, depth 0.0115

    247634849 transit1 at BKJD 3004.09, duration 19.6h, depth 0.011, transit2 at BKJD 3023.48, duration 53.9h, depth 0.019, mentioned by Ivan as an EB, but could be a PC instead

    247640158 P=30.2 days, starting at BKJD 2989.58, duration 5.9 hours, depth 0.048 , very U-shaped

    247671782 P=1.3285 days, starting at BKJD 2987.78, duration 10.8 hours, depth 0.001, it looks more like contamonation by an EB though

    247697037 maybe single transit at BKJD 2998.06, duration 36.3 hours, depth 0.0045

    247698108 P=20.37 days, starting at BKJD 2995.8769, duration 13.7 days, depth 0.0049, very U-shaped

    247725388 P=11.593 days, starting at BKJD 2989.92, duration 6.4 hours, depth 0.048, U-shaped, no secondaries

    247740694 P=48.178 days, starting at BKJD 2992.02, duration 13.2 days, depth 0.0314

    247756662 extremely long single transit , from BKJD 3043.54 to 3056.15, duration 302.5 hours, depth 0.029

    247757302 P=9.84 days, starting at BKJD 2991.28, duration 3.5 hours, depth 0.007

    247762843 maybe single transit at BKJD 3003.58, duration 5 hours, depth 0.0018

    247764399 P=3.947 days, starting at BKJD 2987.89. duration 3 hours, depth 0.0124

    247773181 P=2.78636 days, starting at BKJD 2990.25, duration 3 hours, depth 0.0076

    247887989 MPC, P1=11.02 days , starting at BKJD 2993.15, duration 3 hours, depth 0.002, P2=4.865 days, starting at BKJD 2990.78, duration 3 hours, depth 0.0013, P3=7.673 days, starting at BKJD 2997.52, duration 3 hours, depth 0.0007, P4=2.655 days, duration 2.5 hours, depth 0.0006, maybe even more planets, say at BKJD 3004.866 with a possible period of 14.16 days, or the dip at BKJD 3031.448 , now already on arXiv https://arxiv.org/pdf/1709.01025.pdf with 3 planets P1=11.0244d, P2=4.8679d, P3=3.0715d

    247956487 P=35.38 days, starting at BKJD 3021.63, duration 11.3 hours, depth 0.012, mentioned by Ivan but without a period

    247970247 P=38.06 days, starting at BKJD 3023.55, duration 3.5 hours, depth 0.02

    248047418 P=3.148 days, starting at BKJD 2990.11, duration 4.4 hours, depth 0.0005

    248253950 P=28.93 days, starting at BKJD 2990.38, duration 8.3 hours, depth 0.025, nicely U-shaped

    EB candidates

    210761888 P=5.705802 days, mentioned by Mark and by Ivan (with a totally wrong period, there must habe been a copy/paste error)

    210779706 P=31.47885 days, mentioned by Mark and by Ivan (with a period of 0.64???)

    246630315 P=15.1675 days, mentioned by Ivan with wrong period

    246845309 P=8.539 days, mentioned by Mark and Ivan (with wrong period)

    246909566 P=1.924 days

    247212019 P=18.05 days, mentioned by Mark

    247236218 P=3.556 days, alternating depths

    247253678 P=1.717585 days, it contaminates 247253928, which shows the same period, both are mentioned by Ivan

    247368635 P=3.4525 days

    247419510 P=2.868 days, mentioned by Ivan with half the period (which is wrong)

    247427192 P=12.1733 days

    247444286 P=3.5537 days

    247466997 P=8.961 days

    247467912 P=0.9518 days, mentioned by Mark

    247476202 P=1.4897 days

    247556609 P=13.8534 days, mentioned by Ivan

    247558807 247558807 P=20.10869 days, mentioned by Ivan

    247566342 P=17.415 days, probably hot main star with pulsations, mentioned by Ivan

    247570196 P=0.3368 days, mentioned by Ivan with twice the period

    247594337 single eclipse at BKJD 2997.60, duration 12.3 hours, depth 0.175

    247596579 P=0.416 days

    247596872 P=1.409877 days
    247513856 - SD - period 0.784; from Mark's list
    247605441 P=1.653 days, mentioned by Mark

    247605507 P=1.0088 days, mentioned by Mark

    247606591 P=1.767646 days

    247606731 P=1.767646 days

    247609072 P=18.8999 days

    247610055 P=1.76723 days

    247612547 P=1.768 days

    247615963 P=1.7676 days

    247622877 P=2.827676 days, mentioned by Mark

    247625497 P=3.4407 days

    247634301 P=1.10027 days, mentioned by Mark

    247634812 P=0.31623 days

    247650711 P=0.922118 days

    247669595 P=0.664998 days

    247672517 P=0.533648 days

    247676031 P=35.36 days

    247689275 P=3.752 days

    247691784 P=0.3144 days, mentioned by Mark

    247692298 single eclipse at BKJD 3006.2056, duration 10.3 hours, depth 0.25

    247701950 P=0.258677 days

    247706281 P=1.6959 days, mentioned by Mark

    247712502 P=0.485425 days

    247715790 P=0.795 days

    247716805 P=1.591 days, maybe a bound planet as well, same period, duration 1.96 hours, depth 0.0044

    247724949 P=0.4728 days

    247725590 P=2.878 days (or half of it)

    247741416 P=0.5715 days

    247756471 P=6.274 days

    247757335 P=1.700 days

    247759950 P=3.872 days, mentioned by Mark

    247763502 P=0.3798 days

    247766677 P=18.902 days

    247768417 P=2.0429 days, mentioned by Mark

    247770957 P=0.2834 days

    247776031 P=0.5184 days

    247776236 P=4.3536 days

    247795097 single eclipse at BKJD 3001.996

    247805533 P= 6.889 days, mentioned by Mark

    247807603 P=0.2447 days, mentioned by Mark

    247814074 single eclipse at BKJD 3050.163704

    247817953 P=1.757 days, mentioned by Mark

    247818626 P=3.217 days

    247818792 P=0.954 days, mentioned by Mark

    247826397 P=3.680 days

    247827671 P=2.2999 days, mentioned by Mark

    247832592 P=9.7075 days, maybe additional transit at BKJD 3026.647, duration 6.8 hours, depth 0.003

    247851007 P=2.123 days

    247854634 maybe contamination, P=6.1 days

    247855947 P=31.608 days, the LC has nice micro pulsations, so may be a pretty hot star

    2.077058 P=2.077 days

    247893813 Triple system, P1=1.73675 days, additional single large eclipse at BKJD 3059.74

    247897562 P=0.7218 days, mentioned by Mark

    247900606 P=0.61599 days (found with Al Schmitt's LcViewer 9.2.3beta BLS period finder)

    247909155 P=3.483 days

    247915927 maybe single eclipse at BKJD 3020.97247513856 - SD - period 0.784; from Mark's list

    47919403 P=14.567 days, mentioned by Mark

    247919403 P=14.567 days, mentioned by Mark

    247920681 P=19.32 days, mentioned by Ivan

    247924036 P=20.887 days, mentioned by Mark

    247929367 P=0.967 days

    247938306 P=0.638 days

    247942315 P=0.6465 days

    247959327 P=1.768 days, mentioned by Mark

    247963532 P=0.6412 days

    247967714 single eclipse at BKJD 3012.079

    247969085 P=1.036 days

    247984869 P=1.9165 days, mentioned by Mark

    247993188 P=6.347 days

    247993234 P=0.786 days

    248014667 P=4.4124 days , mentioned by Mark

    248019693 P=1.4727 days

    248023313 P=0.9232 days

    248030530 P=34.999 days

    248033498 P=1.444 days

    248042661 P=unknown, must be extremely eccentrical, primary eclipse at BKJD 3028.99, secondary at BKJD 3032.18

    248097630 P=1.74 days, mentioned by Mark

    248131102 P=1.841 days, maybe contamination though

    248139290 P=0.972 days, mentioned by Mark

    248152851 P=0.3002 days

    248175547 P=17.20 days

    248189363 P=6.299 days, mentioned by Mark

    248209063 P=34.41 days

    248211373 P=2.288 days

    248238650 P=4.692 days, mentioned by Mark

    248241854 P=1.216 days, mentioned by Mark

    251456990 P=1.007 days

    RR_Lyrae

    210754711

    210766289

    210799616 strong Blazhko effect

    210831853

    210862813

    210872065

    210908689

    246623633

    246691697

    246785473

    246786436

    246851302

    246872772

    246917989

    247033375

    247162240

    247246439

    247264480

    247271295

    247359184

    247374553

    247436262

    247446215

    247520086

    247672771

    247755596

    247811730

    247853291

    248152409

    251456991 - 251457003

    251457005 - 251457022

    251457024

    Other

    210896541 maybe Cepheid

    246859790 interesting dips

    246903505 DSCT

    246903505 DSCT

    246945974 DSCT

    247194130 DSCT

    247195838 DSCT

    247205030 DSCT

    247208853 maybe Cepheid

    247269622 strange double dip at BKJD 3043.96, duration 133 days, depth 0.0026

    247384094 DSCT

    247387576 DSCT (Delta Scuti variable)

    247391101 DSCT

    247393705 DSCT

    247423644 DSCT

    247424154 DSCT

    247427120 DSCT

    247430093 DSCT

    2474436442 DSCT

    247437336 DSCT

    247449479 DSCT

    247450197 DSCT

    247450738 DSCT

    247464546 Gamma Doradus

    247465776 DSCT

    247472025 DSCT

    247473022 DSCT

    247473204 DSCT

    247484019 DSCT

    247502964 Gamma Doradus

    247543287 DSCT

    247543803 DSCT

    247555803 DSCT

    247569176 DSCT

    247578480 DSCT

    247580632 DSCT

    247585278 DSCT

    247597835 DSCT

    247598095 DSCT

    247601783 Gamma Doradus

    247608052 DSCT

    247614459 Gamma Doradus

    247633630 DSCT

    247637064 Gamma Doradus

    247638397 DSCT

    247644198 DSCT

    247648610 DSCT

    247672554 DSCT

    247673366 DSCT

    247676134 DSCT

    247684784 DSCT

    247698073 maybe some hierachical system, P1=4.331 days

    247699456 DSCT

    247699466 DSCT

    247702571 DSCT

    247702985 DSCT

    247704683 DSCT

    247714716 DSCT

    247716488 DSCT

    247719895 Gamma Doradus

    247721381 DSCT

    247722387 DSCT

    247723215 DSCT

    247734478 DSCT

    247739116 DSCT

    247739426 DSCT

    247743594 DSCT

    247747930 DSCT

    247755096 DSCT

    247756898 DSCT

    247757478 DSCT

    247760775 DSCT

    247763957 several good dip

    247764923 DSCT

    247765035 DSCT

    247765572 DSCT

    247768006 DSCT

    247776939 DSCT

    247778393 DSCT

    247778521 DSCT

    247781120 DSCT

    247786363 DSCT

    247787283 DSCT

    247787476 DSCT

    247797647 DSCT

    247799135 Gamma Doradus

    247806245 DSCT

    247808850 DSCT

    247810224 DSCT

    247811455 DSCT

    247813931 peak at BKJD 2999.01, duration 112 hours

    247827557 Gamma Doradus

    247828875 DSCT

    247836584 DSCT

    247840933 various good dips

    247854781 DSCT

    247860402 DSCT

    247863199 DSCT

    247863455 DSCT

    247875114 DSCT

    247877462 DSCT

    247880567 DSCT

    247885481 Various large dips, interesting system

    247889515 Gamma Doradus

    247892149 DSCT

    247895546 Gamma Doradus

    247896201 DSCT

    247896942 DSCT

    247909716 DSCT

    247912015 Gamma Doradus

    247929017 DSCT

    247978453 DSCT

    247987782 maybe Cepheid

    247995633 DSCT

    248007785 Gamma Doradus

    248029712 DSCT

    248034728 Gamma Doradus

    248043498 DSCT

    248163739 maybe DSCT, interesting pattern of the LC

    248186938 DSCT

    248257056 maybe Cepheid , period around 12 days

    251456969 quasi-periodic outbursts with P=19 days, maybe CV

    251456970 quasi-periodic outbursts with P=19.15 days, but at BKJD 3060.3 there is an even larger outburst, maybe CV

    251456971 outburst at BKJD 3025.3, duration about 4 days, height near 30!, maybe CV

    glitches

    BKJD 2988.235345 - 2988.521398

    BKJD 2991.065

    BKJD 3032.613204 - 3032.899246

    BKJD 3064.118944 - 3064.527580

    BKJD 3065.835213 - 3066.243822

    Posted

  • ajamyajax by ajamyajax

    Re 248253950 from Hans Martin's list: nicely U-shaped even with only two good partial transits in the MAST data. It might take a smaller star for this to work as a planet candidate though; seems like a smaller giant from a quick theoretical orbit calc with at least one program targeting this type.

    s1=2990.378 p1=28.93 d1=0.3125 (7.5 hours +/-)

    Semi-Major Axis a (A.U.) = 0.166

    Radius (R_Sun) = 1.21

    Mass (M_Sun)= 0.7305

    Period ~= 28.93 days

    Duration ~= 7.5007 hours

    Duration in BKJD ~= 0.3125 days

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    248253950 , 2MASS J04523775+2801147 , 11.299 , 10.794 , 10.628 , 0.505 , 0.166 , ('K3V', 0.81) , ('K6V',0.7)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    248253950 73.1573 28.0207 0.0 12.955 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist

    248253950,2MASS J04523775+2801147,73.157302,28.020732,,,,12.955,16.800,-18.500,

    Aliases

    WISE J045237.76+280114.3

    Programs GO13123_LC, GO13071_LC, GO13048_LC:

    GO13123 Stello Galactic Archaeology on a grand scale

    GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph

    GO13048 Huber Giants Orbiting Giants: A Search for Transiting Planets around Oscillating Evolved Stars with K2

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 247103541 from Ivan's list: T Tau-type as mentioned; also bright at 9.78 Kepmag and seems to be contaminating nearby 247103100.

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247103541 , 2MASS J04363081+1842153 , 8.764 , 8.367 , 7.986 , 0.397 , 0.381 , ('K0V', 0.89) , ('M6V',0.1)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247103541 69.1284 18.7043 0.0 9.780 13

    247103100 69.1419 18.7002 48.17 13.250 13

    247099567 69.1152 18.6657 145.89 8.627 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist

    247103541,2MASS J04363081+1842153,69.128425,18.704259,,,,9.780,-0.100,-14.300,

    Aliases

    TYC 1270-877-1

    From VSX:

    Dist. ' Name AUID Coords (J2000) Const. Var. type Period (d) Mag. range

    0.00 Non-variable NSV 1664 -- 04 36 30.82 +18 42 15.3 Tau -- -- 10.6 p

    http://www.aavso.org/vsx/index.php?view=detail.top&oid=40288

    Listed as HD 285893 -- T Tau-type Star on Simbad, Proper motions mas/yr: -0.070 -13.387, 04 36 30.8245 +18 42 15.338

    Programs GO13117_LC, GO13009_LC, GO13082_LC, GO13052_LC, GO13118_LC, GO13903_LC:

    GO13117 Cody A K2 Monitoring Survey of Young Stars in Taurus: Star and Disk Structure at 1 Myr

    GO13009 Rizzuto Planet Formation and Fundamental Stellar Parameters at the Early Stages of Stellar Evolution

    GO13082 Siwak A photometric study of pre-main sequence stars

    GO13052 Quarles The heat is on: exoplanets that orbit hot stars

    GO13118 Stringfellow The Star-Disk Interaction in Young Stars: Disentangling Accretion, Extinction, Rotation and Binarity

    GO13903 GO Office Targets with Tycho-Gaia DR1 (TGAS) parallaxes known to better than 5%

    T1

    Posted

  • ajamyajax by ajamyajax

    Re 246911830 from Ivan's list: possible HJ as mentioned, but the larger stellar estimates available suggest a stellar companion a bit more likely. Of course will check this noisy light curve again with more corrected data.

    s1=2987.742 p1=2.6267 d1=0.17 (4.08 hours +/-)

    Semi-Major Axis a (A.U.) = 0.044

    Radius (R_Sun) = 1.92

    Mass (M_Sun)= 1.645

    Period ~= 2.628 days

    Duration ~= 4.0821 hours

    Duration in BKJD ~= 0.1701 days

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    246911830 , 2MASS J05072816+1652037 , 11.400 , 11.189 , 11.093 , 0.211 , 0.096 , ('F6V', 1.25) , ('K1V',0.86)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    246911830 76.8673 16.8677 0.0 12.465 13

    246911340 76.8595 16.8628 32.28 12.389 13

    246909720 76.8462 16.8468 104.78 15.576 13

    246914438 76.899 16.8928 141.58 17.903 13

    epic_number,tm_name,ra,dec,Huber_ExoFOP_teff,Huber_ExoFOP_rad,Huber_ExoFOP_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist

    246911830,2MASS J05072816+1652037,76.867324,16.867718,7039,1.86,1.572,12.465,1.100,-0.100,,

    Aliases

    WISE J050728.15+165203.7

    Programs GO13071_LC, GO13122_LC:

    GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 247887989 from Hans Martin's list: as mentioned this appears to be a good MPC with a number of possible planets orbiting a small M-dwarf. Only the better fit is shown, the others were more blended in or could also be just stellar variability. Note Huber et al have a smaller dwarf radius and mass which could make all of these rocky. Also see HM's list above for more periods and epochs.

    s1=2993.175 p1=11.022 d1=0.1104 (2.65 hours +/-)

    s2=2990.79 p2=4.865 d2=0.0841 (2.0192 hours +/-)

    s3=2989.845 p3=7.675 d3=0.0979 (2.3491 hours +/-)

    s4=2989.965 p4=2.643 d4=0.0685 (1.6431 hours +/-)

    s5=2991.4 p5=8.01 d5=0.0992 (2.3819 hours +/-)

    Semi-Major Axis a (A.U.) = 0.077

    Radius (R_Sun) = 0.52

    Mass (M_Sun)= 0.501

    Period ~= 11.026 days

    Duration ~= 2.6502 hours

    Duration in BKJD ~= 0.1104 days

    Semi-Major Axis a (A.U.) = 0.045

    Radius (R_Sun) = 0.52

    Mass (M_Sun)= 0.501

    Period ~= 4.877 days

    Duration ~= 2.0192 hours

    Duration in BKJD ~= 0.0841 days

    Semi-Major Axis a (A.U.) = 0.06

    Radius (R_Sun) = 0.52

    Mass (M_Sun)= 0.501

    Period ~= 7.679 days

    Duration ~= 2.3491 hours

    Duration in BKJD ~= 0.0979 days

    Semi-Major Axis a (A.U.) = 0.03

    Radius (R_Sun) = 0.52

    Mass (M_Sun)= 0.501

    Period ~= 2.628 days

    Duration ~= 1.6431 hours

    Duration in BKJD ~= 0.0685 days

    Semi-Major Axis a (A.U.) = 0.062

    Radius (R_Sun) = 0.52

    Mass (M_Sun)= 0.501

    Period ~= 8.005 days

    Duration ~= 2.3819 hours

    Duration in BKJD ~= 0.0992 days

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247887989 , 2MASS J04403562+2500361 , 11.084 , 10.487 , 10.279 , 0.597 , 0.208 , ('K5V', 0.75) , ('M1V',0.52)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247887989 70.1486 25.01 0.0 13.327 13

    epic_number,tm_name,ra,dec,Huber_ExoFOP_teff,Huber_ExoFOP_rad,Huber_ExoFOP_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist

    247887989,2MASS J04403562+2500361,70.148567,25.010005,3732,0.290,0.298,13.327,187.000,-54.000,

    Listed as LP 358-499 -- High proper-motion Star on Simbad, Proper motions mas/yr: 187 -54, 04 40 35.63 +25 00 36.1

    Programs GO13049_LC, GO13018_LC:

    GO13049 Quintana Discovery and Vetting of K2 Exoplanets

    GO13018 Crossfield The K2 M Dwarf Project: Campaigns 11-13

    F1

    Posted

  • Dolorous_Edd by Dolorous_Edd

    Re: 247887989

    SkyView looks good, CFHT I-band

    enter image description here

    Posted

  • ajamyajax by ajamyajax in response to Dolorous_Edd's comment.

    Groovy!!! 😃

    Posted

  • ajamyajax by ajamyajax

    Re 247893813 from Ivan's list: appears to be a well-studied, very bright target with a known period of 0.8679 days. And the longer period stellar transit might also be known as a K1 III (regular giant) companion, but that just from a quick paper search.

    s1=3059.755 p1=? d1=0.9 (21.6 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247893813 , 2MASS J04580938+2503016 , 5.725 , 5.782 , 5.773 , -0.057 , 0.009 , ('B8V', 3.4) , ('B8V',3.4)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247893813 74.5391 25.0504 0.01 5.897 13

    247895628 74.5385 25.0628 44.54 12.855 13

    247895153 74.5122 25.0595 93.78 10.899 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist,k2_propid

    247893813,2MASS J04580938+2503016,74.539142,25.050406,,,,5.897,27.380,-47.410,,GO13047_LC; GO13122_LC; GO13039_LC; GO13019_LC

    Aliases

    HIP 23088

    98 Tau

    BD+24 717

    HD 31592

    HR 1590

    SAO 76862

    TYC 1836-01792-1

    WDS J04582+2503 A

    From VSX:

    Dist. ' Name AUID Coords (J2000) Const. Var. type Period (d) Mag. range

    0.00 Variable HD 31592 -- 04 58 09.38 +25 03 01.4 Tau ACV 0.8679 5.81 - ? V

    "ACV: α2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields. Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually within 0.01-0.1 mag. in V."

    Programs:

    GO13047 Huber Asteroseismology of the Brightest K2 Stars

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    GO13039 Redfield Monitoring of Targets Within 100 Parsecs

    GO13019 Guzik Statistics of Variability in Main-Sequence Stars of Kepler 2 Fields 11, 12 and 13

    T1

    Posted

  • ajamyajax by ajamyajax

    Re 248047418 from Hans Martin's list: possible high impact gas giant or a blended binary maybe too. Note the professionals have three planet-seeking programs here. The nearby EPIC does not show any obvious signs of this transit.

    s1=2990.11 p1=3.151 d1=0.184167 (4.42 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    248047418 , 2MASS J04291780+2609489 , 9.621 , 9.295 , 9.169 , 0.326 , 0.126 , ('G6V', 0.97) , ('K4V',0.78)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    248047418 67.3242 26.1636 0.0 11.017 13

    248047387 67.3187 26.1634 17.82 13.799 13

    248043988 67.3527 26.1368 133.4 15.084 13

    epic_number,tm_name,ra,dec,Huber_ExoFOP_teff,Huber_ExoFOP_rad,Huber_ExoFOP_mass,k2_kepmag,k2_pmra,k2_pmdec,Huber_ExoFOP_dist,k2_propid

    248047418,2MASS J04291780+2609489,67.324212,26.163595,6277,2.947,1.718,11.017,-5.000,-3.400,4.522e+02,GO13071_LC; GO13122_LC; GO13052_LC

    Aliases

    TYC 1833-113-1

    WISE J042917.80+260948.8

    Listed as HD 283644 -- Star on Simbad, Proper motions mas/yr: -5.0 -3.4, Spectral type: F0, 04 29 17.811 +26 09 48.94

    Programs GO13071_LC; GO13122_LC; GO13052_LC:

    GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    GO13052 Quarles The heat is on: exoplanets that orbit hot stars

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 247634849 from Ivan's and Hans Martin's lists: two nice transit events here that would seem to favor an eccentric binary configuration. With the 4.768 RSun giant Huber et al indicates, the primary transit would be ~70Re. Although with a more modest 0.7 RSun K-dwarf this object might be more Jupiter-sized. But two stellar-like transits make a larger star seem a bit more likely. Edit: perhaps a binary of two smaller main sequence stars would look like a giant.

    s1=3023.48 p1=? d1=2.2 (52.8 hours +/-)

    s2=3004.091 p2=? d2=0.75 (18.0 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247634849 , 2MASS J04474037+2313438 , 11.328 , 10.722 , 10.528 , 0.606 , 0.194 , ('K6V', 0.7) , ('K8V',0.62)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247634849 71.9182 23.2288 0.0 13.572 13

    247636203 71.926 23.2388 44.11 14.855 13

    247637051 71.904 23.2452 75.41 13.077 13

    247634812 71.9546 23.2286 120.25 11.950 13

    epic_number,tm_name,ra,dec,Huber_ExoFOP_teff,Huber_ExoFOP_rad,Huber_ExoFOP_mass,k2_kepmag,k2_pmra,k2_pmdec,Huber_ExoFOP_dist,k2_propid

    247634849,2MASS J04474037+2313438,71.918242,23.228842,4837,4.768,1.266,13.572,8.100,-4.200,1.138e+03,GO13123_LC; GO13048_LC

    Aliases

    WISE J044740.37+231343.7

    Programs

    GO13123 Stello Galactic Archaeology on a grand scale

    GO13048 Huber Giants Orbiting Giants: A Search for Transiting Planets around Oscillating Evolved Stars with K2

    T1

    Posted

  • ajamyajax by ajamyajax

    Re 246851721 from Ivan's list: kind of unruly MAST data, but as mentioned this transit looks like a good hot to warm gas giant candidate. Seems consistent with a fairly hot F-type star here. And the nearby EPIC shows no obvious sign of contamination.

    s1=2988.85 p1=6.18 d1=0.17 (4.08 hours +/-)

    Semi-Major Axis a (A.U.) = 0.067

    Radius (R_Sun) = 1.24

    Mass (M_Sun)= 1.027

    Period ~= 6.181 days

    Duration ~= 4.102 hours

    Duration in BKJD ~= 0.1709 days

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    246851721 , 2MASS J05154075+1616435 , 10.199 , 9.967 , 9.893 , 0.232 , 0.074 , ('F8V', 1.18) , ('G2V',1.0)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    246851721 78.9197 16.2787 0.0 11.257 13

    246852289 78.9336 16.2845 52.24 12.649 13

    246847879 78.9119 16.2399 142.51 14.313 13

    epic_number,tm_name,ra,dec,Huber_ExoFOP_teff,Huber_ExoFOP_rad,Huber_ExoFOP_mass,k2_kepmag,k2_pmra,k2_pmdec,Huber_ExoFOP_dist,k2_propid

    246851721,2MASS J05154075+1616435,78.919746,16.278741,6968,1.721,1.478,11.257,1.900,-12.200,3.908e+02,GO13071_LC; GO13122_LC; GO13024_LC

    Aliases

    TYC 1283-739-1

    WISE J051540.75+161643.3

    Programs GO13071_LC; GO13122_LC; GO13024_LC:

    GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    GO13024 Cochran Planets Around Low-Metallicity Stars (K2 GO4)

    F1

    Posted

  • Dolorous_Edd by Dolorous_Edd in response to ajamyajax's comment.

    Seems consistent with a fairly hot F-type star here.

    spot on, fitted spectral type rF8V according to All-sky spectrally matched Tycho2 stars (Pickles+, 2010)

    Posted

  • ajamyajax by ajamyajax in response to Dolorous_Edd's comment.

    I'm glad my quick calc was close in size to the catalog value, but I should mention Huber et al got an even hotter and larger F-type star here. All of these seem to support a planetary transit though.

    Posted

  • ajamyajax by ajamyajax

    Re 247365042 from Ivan's and Hans Martin's lists: only partial MAST transit data of two possible events, but most signs here suggest a stellar transit in an evolving star system or a main sequence binary. 1.8 RSun produces a transiting object with an estimated 29Re and Huber et al sees a giant larger than that. Also noticed there are a fair number of visually nearby stars in the field of view.

    s1=3002.835 p1=41.7 d1=0.4375 (10.5 hours +/-)

    Semi-Major Axis a (A.U.) = 0.254

    Radius (R_Sun) = 1.8

    Mass (M_Sun)= 1.263

    Period ~= 41.703 days

    Duration ~= 10.502 hours

    Duration in BKJD ~= 0.4376 days

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247365042 , 2MASS J04560986+2106427 , 11.824 , 11.263 , 11.120 , 0.561 , 0.143 , ('K6V', 0.7) , ('K5V',0.75)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247365042 74.0411 21.1119 0.01 13.813 13

    epic_number,tm_name,ra,dec,Huber_ExoFOP_teff,Huber_ExoFOP_rad,Huber_ExoFOP_mass,k2_kepmag,k2_pmra,k2_pmdec,Huber_ExoFOP_dist,k2_propid

    247365042,2MASS J04560986+2106427,74.041088,21.111853,4868,3.084,1.257,13.813,-4.400,-10.300,9.634e+02,GO13019_LC

    Aliases

    WISE J045609.85+210642.8

    Program GO13019 Guzik Statistics of Variability in Main-Sequence Stars of Kepler 2 Fields 11, 12 and 13

    F1

    Posted

  • zoo3hans by zoo3hans

    Well, I try to contribute to K2_C13_Corr (as usual from the last one):

    PC candidates

    246851148 MPC, P1=18.8983 days, starting at BKJD 2990.11, duration 3.5 hours, depth 0.0016, mentioned by Ivan, P2=7.2683 days, starting at BKJD 2991.90, duration 2.5 hours, depth 0.0009

    246861155 maybe MPC, P1=2.5737 days, starting at BKJD 2990.72, duration 5.9 hours, depth 0.0024, P2=4.9039 days, starting at BKJD 2988.93, duration 4.4 hours, depth 0.0046 (periods found by the BLS routine of LcViewer)

    246891819 MPC, P1=2.217259 days, starting at BKJD 2990.69, duration 2.5 hours, depth 0.0008, P2=4.807 days, starting at BKJD 2991.98, duration 3.5 hours, depth 0.0015, P3=8.49 days, starting at BKJD 2990.58, duration 3.0 hours, depth 0.0027, P4=16.423 days, starting at BKJD 2993.0, duration 4.0 hours, depth 0.0017, mentioned by Ivan with 3 planets

    246907677 maybe single transit at BKJD 3026.64, duration 4.4 hours, depth 0.0013

    246920193 maybe MPC, P1=10.19394 days, starting at BKJD 2993.24, duration 3 hours, depth 0.0004, P2=54.1155 days, starting at BKJD 3004.14, duration 5 hours, depth 0.0002

    246932192 P=35.9925 days, starting 3011.14, duration 18 hours, depth 0.0021

    246933150 maybe MPC, P=1.52787 days, starting at BKJD 2989.58, duration 2.5 hours, depth 0.0017, P2=11.8913 days, starting at BKJD 2996.52, duration 2.5 hours, depth 0.0013, P3=15.93 days, starting at BKJD 2989.56, duration 6.5 hours, depth 0.0014, more dips visible

    247018395 maybe P1=26.582 days, starting at BKJD 2989.33, duration 5.0 hours, depth 0.0003, P2=46.72 days, duration 7.5 hours, depth 0.0004

    247310581 P=16.57 days, starting at BKJD 2989.15, duration 2.5 hours, depth 0.00085. Mentioned by Ivan

    247721155 P=11.921 days, starting at BKJD 2997.99, duration 9.3 hours, depth 0.0016

    247724061 P=2.310258 days, starting at BKJD 2988.62, duration 2.5 hours, depth 0.0006

    247963566 P1=0.6414 days, starting at BKJD 2989.03, duration 3.9 hours, depth 0.0005, second transit at BKJD 3002.16, duration 8.3 hours, depth 0.0009

    247988033 P1=5.167 days, starting at BKJD 2992.72, duration 3.5 hours, depth 0.0005, P2=15.94 days, starting at BKJD 2996.43, duration 4.9 hours, depth 0.0005

    248045685 single transit at BKJD 2995.386, duration 4.9 hours, depth 0.0009, U-shaped, P2=60.478 days, starting at BKJD 3002.15, duration 3 hours, depth 0.00015, U-shaped

    248072361 maybe transit at BKJD 3002.548, duration 6.4 hours, depth 0.0108

    248230823 P=9.912 days, starting at BKJD 2988.65, duration 6.8 hours, depth 0.0013

    EB candidates

    210744674 P=25.2379 days, from the C4_C13 overlap, as Mark said, it's likely an EB, the depth gives a R = 28 R-Earth estimate

    210905963 P=41.0727 days, additional dips with period P2=16.104 days, starting at BKJD 2992.52, duration 9.3 hours, depth 0.0011, P2=1.655 days, starting at BKJD 2988.69, duration 5.4 hours, depth 0.0013

    246820559 P=1.92559 days

    247549544 P=9.833 days

    247555683 P=5.9659 days

    247580908 P=0.7749 days

    247605210 probably contaminated by 247606591 or 247606658, P=1.768096 days

    247606275 probably contaminated by 247606591 or 247606658, P=1.768096 days

    247893813 large dip at BKJD 3059.74, duration 22 hours, depth 0.17, contaminates 247895628 at BKJD 3059.74, duration 22 hours, depth 0.0205, also contaminates EPIC 247895153, mentioned by Mark

    248222323 P=9.4275 days

    Posted

  • ajamyajax by ajamyajax

    Re 246769933 from Ivan's list: appears to be an alternating eclipsing binary with a small secondary and transits at the flux minimas, but the transit depth is fairly shallow. So if not a small stellar companion maybe a chance for a high impact gas giant with a smaller F-type primary.

    s1=2990.7441 p1=3.933313 d1=0.09 (2.16 hours +/-)

    Semi-Major Axis a (A.U.) = 0.061

    Radius (R_Sun) = 2.22

    Mass (M_Sun)= 1.97

    Period ~= 3.94 days

    Duration ~= 2.1566 hours

    Duration in BKJD ~= 0.0899 days

    Estimated duration for center of star transit ~= 5.0867 hours

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    246769933 , 2MASS J05034344+1524389 , 10.619 , 10.489 , 10.379 , 0.13 , 0.11 , ('F1V', 1.5) , ('K4V',0.78)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    246769933 75.9309 15.4108 0.01 11.738 13

    246770387 75.9127 15.416 65.91 12.496 13

    246770285 75.9633 15.415 113.23 13.883 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist,k2_propid

    246769933,2MASS J05034344+1524389,75.930941,15.410827,7887.00,2.22,1.97,11.738,-1.400,-4.000,645.10,GO13071_LC; GO13122_LC

    Aliases

    TYC 1281-1634-1

    WISE J050343.44+152438.9

    Programs:

    GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 247098361 from Ivan's and Hans Martin's lists: indeed, looks like a nice warm Jupiter candidate at 13.39Re or 1.185Rj in this estimate using 1.28 RSun. And could be a bit larger. Fairly close with high proper motion values also.

    s1=2992.349 p1=11.17 d1=0.2154167 (5.17 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247098361 , 2MASS J04550395+1839164 , 8.739 , 8.480 , 8.434 , 0.259 , 0.046 , ('G0V', 1.09) , ('F0V',1.58)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247098361 73.7665 18.6545 0.0 9.789 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist,k2_propid

    247098361,2MASS J04550395+1839164,73.766510,18.654535,6057.00,1.28,1.09,9.789,62.000,-48.200,131.60,GO13071_LC; GO13122_LC; GO13024_LC; GO13903_LC

    Aliases

    TYC 1284-745-1

    WISE J045504.00+183915.8

    Listed as HD 286123 -- Star in Cluster on Simbad, Spectral type: G0, Parallaxes (mas): 7.69, Proper motions mas/yr: 62.356 -48.297

    Programs:

    GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    GO13024 Cochran Planets Around Low-Metallicity Stars (K2 GO4)

    GO13903 GO Office Targets with Tycho-Gaia DR1 (TGAS) parallaxes known to better than 5%

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 210927096 from Hans Martin's and Ivan's lists: pretty good evidence of an alternating eclipsing binary in this light curve.

    s1=2988.16 p1=1.45539 d1=0.085833 (2.06 hours +/-) <-- binary period double this value

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    210927096 , 2MASS J04220362+2149086 , 13.065 , 12.412 , 12.191 , 0.653 , 0.221 , ('M7V', 0.098) , ('M0V',0.58)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    210927096 65.5151 21.8191 0.01 15.335 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist,k2_propid

    210927096,2MASS J04220362+2149086,65.515116,21.819090,4212.00,0.51,0.56,15.335,24.900,-11.300,229.40,GO13049_LC; GO13050_LC

    Aliases

    WISE J042203.63+214908.6

    Programs:

    GO13049 Quintana Discovery and Vetting of K2 Exoplanets

    GO13050 Burke K2 Exoplanet Ecliptic Survey - KEES

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 247178163 from Ivan's and Hans Martin's lists: possibly planetary if an early K-type star (shown) or even a bit larger, but Huber et al. estimate 1.26 RSun here so that increase could indicate a small stellar companion.

    s1=3004.853 p1=22.5645; d1=0.144 (3.456 hours +/-)

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    247178163 , 2MASS J05200161+1924561 , 11.426 , 11.007 , 10.878 , 0.419 , 0.129 , ('K1V', 0.86) , ('K4V',0.78)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    247178163 80.0067 19.4156 0.01 13.002 13

    247177859 79.9891 19.4129 60.6 14.416 13

    247181159 79.9858 19.4445 126.1 13.436 13

    247182056 80.0047 19.4531 135.26 12.416 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist,k2_propid

    247178163,2MASS J05200161+1924561,80.006725,19.415584,6006.00,1.26,1.12,13.002,15.400,-6.500,386.60,GO13049_LC; GO13123_LC; GO13122_LC

    Aliases

    WISE J052001.62+192456.0

    Programs:

    GO13049 Quintana Discovery and Vetting of K2 Exoplanets

    GO13123 Stello Galactic Archaeology on a grand scale

    GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4

    F1

    Posted

  • zoo3hans by zoo3hans

    EPIC 210897587 is now confirmed with 3 planets in https://arxiv.org/pdf/1801.06249.pdf

    Posted

  • zoo3hans by zoo3hans in response to ajamyajax's comment.

    EPIC 247098361 is now confirmed in https://arxiv.org/abs/1803.02858

    Posted

  • ProtoJeb21 by ProtoJeb21

    @ajamyajax I recently stumbled across a tiny (59.4 ppm) candidate planet signal with a period of 2.2544 days around the star EPIC 210744744. However, it’s listed on ExoFOP as a 4.8 solar radius orange subgiant, while its J-H and H-K values are more comparable to that of a small M-dwarf like Kepler-445. What radius are you able to find for the star?

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    ProtoJeb: not much to go on here, but always interesting to try and determine the radius of these and more.. Suggest we circle back to this target when more stellar data are available.

    Re 210744744 from ProtoJeb's list: J-H and B-V suggests either a K4-K3 dwarf or subgiant possible, yet Huber et al. see a fairly distant and larger mass iron poor giant class star (561 parsecs, 0.96 MSun, 3.067 logg, -0.486 feh). Although the proper motions seem to suggest a closer target so this needs more research.

    Update: found a parallax of 17.45 in the Gaia DR1 catalogue which converts to a distance in parsecs of 57.31. So this could be more accurate for these proper motions which are similar to the Huber et al. values shown (pmRA -4.6 and pmDE -66.9 from Gaia).

    EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)

    210744744 , 2MASS J04303224+1901431 , 9.471 , 8.923 , 8.635 , 0.548 , 0.288 , ('K4V', 0.78) , ('M4V',0.24)

    From NEA, K2 Targets within search area:

    EPIC Number RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag] Campaign Number

    210744744 67.6344 19.0287 0.01 11.456 13

    epic_number,tm_name,ra,dec,k2_teff,k2_rad,k2_mass,k2_kepmag,k2_pmra,k2_pmdec,k2_dist,k2_propid

    210744744,2MASS J04303224+1901431,67.634373,19.028663,4912.00,4.75,0.96,11.456,-4.100,-63.600,561.30,GO13049_LC; GO13123_LC; GO13018_LC; GO13903_LC

    Aliases

    TYC 1273-294-1

    WISE J043032.23+190142.3

    Programs:

    GO13049 Quintana Discovery and Vetting of K2 Exoplanets

    GO13123 Stello Galactic Archaeology on a grand scale

    GO13018 Crossfield The K2 M Dwarf Project: Campaigns 11-13

    GO13903 GO Office Targets with Tycho-Gaia DR1 (TGAS) parallaxes known to better than 5%

    Listed as TYC 1273-294-1 -- High proper-motion Star on Simbad, Proper motions mas/yr: -2.812 -67.720, 04 30 32.2342 +19 01 43.045

    SDSS DR7 image:

    SDSSDR7

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    ProtoJeb: the just released Gaia DR2 data has these values which favors the smaller dwarf here. I think a bit more research should be done on how these were derived and for the larger star Huber et al. values also. But if your observed transit duration works with the smaller dwarf (and it fold ok), why not go with that.

    Gaia DR2 Plx 17.5758 mas

    Gaia DR2 distance in parsecs 56.9

    Gaia DR2 ePlx 0.0617

    Gaia DR2 PMRa -2.687

    Gaia DR2 ePMRa 0.112

    Gaia DR2 PMDec -67.228

    Gaia DR2 ePMDec 0.069

    Gaia DR2 RV 2.62 km / s

    Gaia DR2 eRV 0.44

    Gaia DR2 Teff 4165.31

    Gaia DR2 RSun 0.61

    Gaia DR2 LSun 0.099

    Posted

  • ProtoJeb21 by ProtoJeb21

    I decided to further analyze some of the more interesting candidates and multi-candidate systems in the giant lists by @ajamyajax @zoo3hans and @Dolorus_Edd. These are what I managed to find using LcViewer and the BLS algorithm.

    EPIC 246851721 was noted to have three candidates, but I was only able to find the large 6.18-day signal because of how noisy the Everest2 data is. There's an enormous amount of data for this system on ExoFOP, so I expect some or all of these candidates to be confirmed within the coming months.

    EPIC 246953392 is another mentioned 3-planet system. I can only find the 0.674 and 25.734 day signals once again due to a relatively noisy light curve (something tells me there are a few LcViewer quality bits I need to check for an optimal LC). The inner USP candidate is a 1.59 R_Earth Super-Earth with an equilibrium temp of 1984 K (3111.5 F, 1710.9 C) for a 0.3 albedo. What's odd is that the folded transit shows signs of secondary eclipses, which means the planet's front side could be very reflective or very hot or both, like K2-141b. The outer candidate is a Hot Neptune with a radius of 3.36 R_Earth and an equilibrium temperature of 589 K (600.5 F, 315.9 C).

    EPIC 247455816 was reported to have 7 signals found by the BLS algorithm that were likely error related. After detrending the Everest2 light curve I can find no convincing planet candidates.

    EPIC 247455360 was noted to have a small (~300 ppm) long-period candidate. I was able to find this transit at epoch 3027.423762 lasting about 7.84 hours with a depth of 330.5 ppm. Using the parameters on ExoFOP, this candidate is about 2.7 R_Earth and takes no less than 40.52 days to orbit its star. However, with J-H and H-K values of 0.333 and 0.100, EPIC 247455360 could be smaller, with a radius and mass closer to that of the Sun.

    EPIC 247234505 has two potential transit events from a 64-day candidate. I was able to find this planet, which has an orbital period of 64.654880 days and a mean transit duration of over 12 hours. The long transit duration suggests this could be some type of eclipsing binary, or maybe some form of stellar variability. If a real planet, it is a typical hot Mini-Neptune of 2.3 R_Earth with a temperature around 501 K (442.1 F, 227.9 C).

    EPIC 247164043 was noted for possibly having two planets. The first was very easy to find with the BLS algorithm. It's a 3.35 R_Earth Hot Neptune orbiting every 5.227707 days with an equilibrium temperature of 1433 K (2119.7 F, 1159.9 C). The BLS algorithm also reveals that yes, there is a second planet in the system, a smaller 2.00 R_Earth planet orbiting every 8.509283 days with a somewhat cooler but still overwhelmingly inhospitable temperature of 1219 K (1734.5 F, 945.9 C). No other signals were found.

    EPIC 246891819's three candidates were easily found by the BLS algorithm. The star is likely much smaller than the parameters given on ExoFOP. With J-H/H-K values of 0.586 and 0.143, it is likely a small or medium-sized orange dwarf. The three candidates have transit depths of 1022.9, 1428.4, and 814.8 ppm.

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    ProtoJeb, thanks for the closer looks. We should see if we can find some candidates we can agree on to get some combined PH/EE or EE/PH papers started after the professional scientists have had a good look. I'm thinking once the TESS data starts rolling in, many of them will jump over there so we should have plenty of K2 candidates left to choose from. We will look for exoplanet transits in TESS also of course. Agreed?

    Posted

  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    That sounds good. What system(s) should we start with?

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    How about one of your favorites I believe, HZ candidates? MPCs are better for VESPA, and distinct 3 or more repeat transits are always easier to fit and try to verify.

    Posted

  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    I think we should try either EPIC 220221272, EPIC 248435473, and/or EPIC 201663913. EPIC 220221272 is a compact five-planet system found by Vidar87 and shutcheon over on EE, with four hot Earth-sized and smaller planets and a large temperate Super-Earth. The other two, EPIC 248435473 and EPIC 201663913, are intriguing multi-candidate systems I stumbled across in my C14 survey that were already reported on the C14 thread back in November/December 2017. The first has up to five planets, with my analysis finding three “Hot Marses” and two warm Mini-Neptunes in a very peculiar orbital configuration. EPIC 201663913 has five candidates reported by @zoo3hans orbiting every 11.62, 17.65, 26.71, 35.63, and 48.13 days around a medium sized M-dwarf. However, my initial analysis found only the 17.65 and 26.71 day signals, with a follow-up analysis revealing a potential 71-day candidate from two transit-like events. I’m inclined to believe that the 5-planet results are correct because I feel like I haven’t been preoperly processing my Everest2 C13 and C14 lightcurves during my follow-up analyses.

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    Ok, I'll run all these though my programs, even if I looked at before because of new Gaia data and more new routines I have. Also will check for detail papers / summary ones ok and post results on the K2 campaign pages here (I'm loyal to PH). Then we can put the results up for a vote and I will start a discovery paper for us all on whatever system looks best to everyone, simple as that. You can ask the EE scientists later if they want to help and I will do the same here. And you, HM, Ivan, or anyone just add any more possible HZ candidates you think of here, because these would be an interesting discovery for everyone I think.

    Posted

  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    That sounds good. I'll try to reach out to Vidar87 and/or Jessie Christainsen about this either today or tomorrow. Currently I'm going through some of the interesting multi-candidate systems on the C14 thread and from my C14 survey. Something I quickly realized was that a good amount of the signals reported by Hans or Dolorus_Edd are ones that I would skip over if I found. Case in point: EPIC 248575009. The BLS algorithm was easily able to find all three signals of 13.233, 15.208, and 33.477 days. However, their folded transits look nothing like what I would consider to be a candidate planet. I'm getting the feeling that I don't understand what to look for when it comes to weak planet candidate signals, and that I've been excluding many signals that might actually be legitimate planets.

    Also, I decided to calculate the near-resonances of the EPIC 201663913 system (the five-planet interpretation) and found something interesting: All planet candidates are extremely close to exact resonances. The ratios of their orbital periods are less than 1.5% off from being an exact 2:3 or 3:4 MMR - for example, the ratio between the orbital periods of the second and third signals (17.64794 and 26.706898 days) is 0.6608008, compared to 0.6666666... for an exact 2:3 resonance. These near-perfect MMRs between the candidates in the five-planet interpretation supports this being the correct interpretation, as random noise mistaken for planetary signals would be very unlikely to, by chance, be in these precise configurations. Unfortunately, the BLS algorithm couldn't find most of these signals, but that may be due to them being too weak for the algorithm to detect.

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    ProtoJeb: will have a look at 248575009 for another opinion. And 248435473 from your list (c14) an excellent MPC with TTV, but have heard the professionals are working on this target so let's see what they do with this first. And that is the last of your previous list of three. If you have any more HZ candidates you like that are not yet in any papers, please post. Of course we have many other MPCs here also, and I would be glad to add you and any other serious EE contributors to a paper draft should I start one up for any of those.

    Posted

  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    I was able to get in contact with Vidar87 last week, and it seems like he’ll be able to join in this collaboration. He also suggested the HZ Candidates EPIC 211788221.01 (potentially similar to Kepler-438 Ab) and EPIC 220266225.01 (has just about the same radius and stellar flux as Earth with current stellar parameters). I’d also like to suggest EPIC 220355335.01, which is smaller and significantly cooler than Earth with the current parameters for the host star. However, since the star is likely somewhat larger, the candidate planet could still orbit in the habitable zone and may have an Earth-like stellar flux. I may find at least one other MPC system or HZ candidate for this study.

    A few questions: what’s EPIC 248575009? I don’t recognize the designation from my C14 studies. Secondly, do you know if Jessie Christiansen’s team is working on EPIC 248435473 or if it’s a different group? Last I heard, the former was working on EPIC 210693462.01. Thirdly, how’s the analysis on EPIC 220221272 been going since the other day?

    Posted

  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    Ok thanks, will look at those targets too when I can. And HZ a nice bonus and a worthy goal for us here I think. 248575009 mentioned in your previous post, but all I know about it so far. Regarding 248435473, we heard from Andrew Vanderburg they are interested in this target and Joey Rodriguez leading the effort there but that's all I know. Regarding 220221272, the p=9.731 candidate is looking a bit better with some LC clean up. I posted a vespa update, but unfortunately still a fpp to vespa. And there likely are more candidates at the extra interesting HZ distance too in my opinion/agree with you, but more difficult to try and verify at any level I presume with only one or two blended-in transits.

    Posted

  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    What were the periods and epochs of the extra candidate(s) you found around EPIC 220221272? I want to check them out when I get the time.

    Posted

  • ajamyajax by ajamyajax

    Any of the remaining possible transits are still candidates and all I have there so far. If you want to look for any similar depths and durations that might help too. Thanks.

    Posted

  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    I don’t have much time this weekend, but I’ll see what I can find. What are your thoughts on the 31-day signal I posted on Exoplanet Explorers a few weeks back?

    Posted

  • ProtoJeb21 by ProtoJeb21

    @ajamyajax should we also analyze the K2-72 system in this study? There is likely a fifth planet orbiting about once a month in the system's habitable zone, and there have been no studies mentioning or describing it.

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  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    Sure, seems like a good idea and sounds very interesting! If closely studied by the pros though, they likely already know about what you mentioned even if not documented.

    Also making good progress with your p=20.748587 candidate, and with p=2.232 and p=9.829 for 220221272 too. After a number of minor adjustments and many runs, all have good enough vespa results to consider them real candidates I think.
    Will add these results I have saved in our first draft PH/EE paper, if we decide to push this system forward. Next though I'll finish up runs for your other HZ candidates for this system, then move on to the other HZ ideas you mentioned. Always much to do, as you know.

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  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    Great job! Do you have the VESPA diagrams and radii for the 2.2, 9.8, and 20.8 day candidates? Also, is there anything I can help out with?

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  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    Yes, I have all my preliminary results and diagrams as before. Will put final numbers in the paper draft if or when we agree to push this one forward. I am still working the plan we talked about before, where we look at a few of these and vote on which HZ target to write up first. It is a lot of work as anyone will tell you. And you are welcome to get started on your computer with your own thoughts, and I could try to add your text to the paper format document later.

    p.s one thing you should know is 220221272 is a rather dim target at 14.256 kepmag and might not be easily observed for RV (to confirm these exoplanets) with the instruments our scientists have access to currently. Maybe you could check on that with your EE science team, if you want to. In other words, a brighter HZ system might be a better first choice.

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  • ProtoJeb21 by ProtoJeb21 in response to ajamyajax's comment.

    There are, unfortunately, no stars hosting a candidate HZ planet that are brighter than 13th magnitude. A few are brighter than 14th magnitude, but their candidates are either more likely to be Venus analogues or their systems are far less interesting compared to EPIC 220221272. Even the three HZ candidates I suggested last week orbit dim stars. I think it’s best to stay with EPIC 220221272 since it’s a very intriguing and rare find that’s been under analysis for far longer than any of the other systems I’ve suggested.

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  • ProtoJeb21 by ProtoJeb21

    Maybe EPIC 248527709 or EPIC 248731669 could work as another system to analyze. EPIC 220221272 is a small red/orange dwarf with four transiting planet candidates, including a long-period ~2 Re Mini-Neptune that may reside in the system's habitable zone. However, David Ciardi imaged the star with the Keck telescope and uploaded his results to ExoFOP on March 29th, so it looks like that system may be under study already. Oddly, there were a lot of systems (including EPIC 210693462 and EPIC 248651022) that were observed by him on that night. Looks like a large study may be in the works. The other system, EPIC 248731669, has three likely rocky candidates and seems similar to K2-155. Unfortunately, it's also very dim, and the outermost planet could be a Venus analogue, given that the star's color index suggest it's a larger M1V red dwarf. Nobody else is studying it as far as I know.

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  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    Ok, we can start with 220221272. I just got through the preliminary runs of the "new" HZ candidates in vespa, and P=20.748587 and P=49.056768 still have a chance as candidates in my view (P=49.056768 less so because of only two transit events). The others look like bgeb-type fpp's as shown below.

    Next I will create a first draft for us in sharelatex (very often used for scientific papers it seems, if you want to study how that works). I will include you and all the other great astronomy folks I work with already, and anyone can add content as they wish. Then we'll see what's next.

    On your new candidates, certainly agree 248527709 (kepmag 12.916) very promising, but my guess is another system where the professionals probably interested and we should check with them later to see what they are doing with it, if anything. Something else to do then! Will look at the other one as well. And more later, as usual. 😃

    fpp example 2

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  • ProtoJeb21 by ProtoJeb21

    @ajamyajax should I contact Jessie Christainsen on EE about this study?

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  • ajamyajax by ajamyajax in response to ProtoJeb21's comment.

    ProtoJeb, that's a good idea whenever you are ready. I asked Andrew Vanderburg for his thoughts yesterday and will let you know if or when he replies (busy). Best case I think, we all team up for one nice paper. If not too dim for RV of course. In the meantime I keep working on what I do and will probably start the first sharelatex draft this weekend. In that regard, it occurs to me you are on the LcTools email list that Al sends and I am also. So you can easily see my email there by this screen name and name of course (Mark Omohundro). When you get a chance, would you send me an e-mail of your name and the other EE contributors for this system? Will check tomorrow. I will put everyone in this first paper draft with a link to follow to everyone later when this first c8 target draft is ready. Thanks.

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