C13 K2 finds
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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:
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
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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
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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 13epic_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
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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
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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
Posted
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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 13epic_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+231722.3Programs:
GO13049_LC: Quintana Discovery and Vetting of K2 Exoplanets
https://keplergo.arc.nasa.gov/data/k2-programs/GO13049.txtGO13050_LC: Burke K2 Exoplanet Ecliptic Survey - KEES
https://keplergo.arc.nasa.gov/data/k2-programs/GO13050.txt
Posted
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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
-
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 Mark247605507 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
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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 daysEPIC, 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 13epic_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+280114.3Programs 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 K2Posted
-
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 13epic_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 1270-877-1From 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 phttp://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%Posted
-
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 daysEPIC, 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 13epic_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+165203.7Programs 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 4Posted
-
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 daysSemi-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 daysSemi-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 daysSemi-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 daysSemi-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 daysEPIC, 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 13epic_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 11-13Posted
-
by Dolorous_Edd
Re: 247887989
SkyView looks good, CFHT I-band
Posted
-
by ajamyajax in response to Dolorous_Edd's comment.
Groovy!!! 😃
Posted
-
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 13epic_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_LCAliases
HIP 23088
98 Tau
BD+24 717
HD 31592
HR 1590
SAO 76862
TYC 1836-01792-1
WDS J04582+2503 AFrom 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 13Posted
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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 13epic_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_LCAliases
TYC 1833-113-1
WISE J042917.80+260948.8Listed 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 starsPosted
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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 13epic_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_LCAliases
WISE J044740.37+231343.7Programs
GO13123 Stello Galactic Archaeology on a grand scale
GO13048 Huber Giants Orbiting Giants: A Search for Transiting Planets around Oscillating Evolved Stars with K2Posted
-
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 daysEPIC, 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 13epic_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_LCAliases
TYC 1283-739-1
WISE J051540.75+161643.3Programs 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)Posted
-
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
-
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
-
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 daysEPIC, 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 13epic_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_LCAliases
WISE J045609.85+210642.8Program GO13019 Guzik Statistics of Variability in Main-Sequence Stars of Kepler 2 Fields 11, 12 and 13
Posted
-
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
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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 hoursEPIC, 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 13epic_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_LCAliases
TYC 1281-1634-1
WISE J050343.44+152438.9Programs:
GO13071 Charbonneau Characterizing Small K2 Planets with the HARPS-N Spectrograph
GO13122 Howard The Masses and Prevalence of Small Planets with K2 - Cycle 4Posted
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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 13epic_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_LCAliases
TYC 1284-745-1
WISE J045504.00+183915.8Listed 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%Posted
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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 13epic_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_LCAliases
WISE J042203.63+214908.6Programs:
GO13049 Quintana Discovery and Vetting of K2 Exoplanets
GO13050 Burke K2 Exoplanet Ecliptic Survey - KEESPosted
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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 13epic_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_LCAliases
WISE J052001.62+192456.0Programs:
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 4Posted
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by zoo3hans
EPIC 210897587 is now confirmed with 3 planets in https://arxiv.org/pdf/1801.06249.pdf
Posted
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by zoo3hans in response to ajamyajax's comment.
EPIC 247098361 is now confirmed in https://arxiv.org/abs/1803.02858
Posted
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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
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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 13epic_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_LCAliases
TYC 1273-294-1
WISE J043032.23+190142.3Programs:
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:
Posted
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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 0.0617Gaia DR2 PMRa -2.687
Gaia DR2 ePMRa 0.112
Gaia DR2 PMDec -67.228
Gaia DR2 ePMDec 0.069Gaia DR2 RV 2.62 km / s
Gaia DR2 eRV 0.44
Gaia DR2 Teff 4165.31
Gaia DR2 RSun 0.61
Gaia DR2 LSun 0.099Posted
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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
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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
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by ProtoJeb21 in response to ajamyajax's comment.
That sounds good. What system(s) should we start with?
Posted
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
Posted
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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.Posted
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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?
Posted
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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.
Posted
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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.
Posted
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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.
Posted
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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. 😃
Posted
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by ProtoJeb21
@ajamyajax should I contact Jessie Christainsen on EE about this study?
Posted
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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.
Posted