Planet Hunters Talk

C9 K2 finds

  • Dolorous_Edd by Dolorous_Edd

    The K2 C9 minimally corrected lightcurves, courtesy of Mark Omohundro (ajamyajax)

    Posted

  • Dolorous_Edd by Dolorous_Edd

    Possible PCs EPICs

    226547563 - possible PC or EB period 0.719; depth ~0.5%

    224504404 - dip at 2673.195 and 2686.100 period 12.844 or ~5 days

    224389484 - 2 dips, one at 2699.60 and 2721.17

    224389138 - PC period 5.923 depth ~1%

    Possible EBs EPIC

    227719084 - period 4.445

    227563774

    227515758 - period 12.926

    226775940

    226609366 - possible EB? HB?

    225191577 - period 2.256

    224510238 - single dip at 2693.32

    224493585 - period 5.610

    224466741 - eb period 4.567 start at 2671.7 ; maybe trinary some of the dips have interesting configurations

    224439122 - 2 dips ; at 2682.799 and 2717.96 ; period 35.180

    224417043 - EB dip at 2677.80

    224412309 - period 0.188

    224400629 - possible HB ; period ~3.88

    224430834 - period 0.151

    224351176 - period 4.576

    224328571 - maybe single dip at 2688.94

    224328215 - possible Trinary; period 10.336 ; third body period 1.366; additional dips at 2675.68 and 2685.00 and 2694.02 (fourth? body ) period 9.3d; if it is not all contamination

    223646517

    223254456 - EB; possible Trinary; period 1.197; maybe even trinary , there a third set of transits (noted by Mark )

    223252417 - EB ; primary at 2684.42 ; and probably secondary at 2673.3 ( noted by Mark ) from new data period 22d

    222267075 - period 1.205 (noted by Mark)

    222907137

    222579973

    222556570

    221937241

    Possible Cepheid and RR lyr EPICs

    248368732 - R

    248368728 - R

    248368727 - R

    248368724 - R

    248368722 - R

    248368687 - R

    248368684 - R

    248368681 - R

    248368677 - R

    248368674 - R

    248368671 - R

    248368667 - R

    248368665 - R

    248368664 - R

    227315843 - C

    226338470 - C

    225102663 - C

    225099906 - C

    225008081 - maybe C ?

    224451295 - maybe C

    224392069 - maybe C

    223381838 - R

    223556966 - R

    223493966 - maybe C

    223482421 - maybe C

    223205550 - maybe C

    223051042 - maybe C

    222964820 - R

    222832946 - C

    228147439 - R

    225945064 - R

    222691358 - R ( noted by Mark )

    222668291 - maybe C

    223557439 - C

    222541171 - R

    222539630 - R

    222343049 - C

    222229673 - R (noted by Mark)

    227916945 - C

    222759976 - C

    227267697 - C

    226742010 - R

    226412831 - C

    226377509 - C

    225102663 - C

    225322328 - C

    222361622 - C

    221938867 - R

    Flares, lens, SSO cross EPIC

    226926619 at 2685.722

    227028693 at 2675.137 and 2686.29

    226564268 at 2672.265

    226007518 - at 2677.70

    225677621 - flares, noteable events at 2676.75 and 2675.81 and 2688.13

    225587997 at 2675.1058 and 2684.046

    225389644 at 2675.11 and 2684.0

    225377677 - at 2675.1

    225330052 - at 2686.29

    225112638 - flares; noteable events at 2669.72 and 2675.106; 2688.13

    224439122 at 2676.54645

    224367988 - at 2675.9

    223700424 - at 2668.50 and 2670.191

    223557439 at 2675.116 and 2684.046

    222832946 - flares; 2668.97 ;2671.682 ; 2672.90; 2677.75; 2679.00; 2679.24 ; 2679.478 ; 2681.4 ; 2685.395

    222441601 - at 2669.0 ; 2679.81

    222429836 - flares; 2677.792 ; 2679.00; 2679.24 ; 2679.478 ; 2685.405; maybe even HB

    222361076 - at 2668.167 and 2692.6289

    226879801 at 2675.137 and 2685.865

    226865747 at 2684.762

    226774328 at 2675.1371 and 2686.724

    226742929 - at 2675.137 and 2677.783 and 2685.31

    224947037 - at 2672.0201 and 2672.67

    224895617 - at 2676.78 and at 2676.8

    224847398 - at 2669.55 and 2670.518

    224825377 - at 2675.9

    224794507 - at 2675.7903

    224794507 - at 2675.780

    224782319 - 2680.1326

    224757434 - at 2675.72

    224700649 - at 2687.877 and 2688.52

    224689894 - 2687.71 and 2688.52

    224669306 - at 2682.881 and 2683.62

    224661760 - maybe flare or lens 2680.49 and 2681.12 and 2681.20

    Other EPIC

    227007143- some big dips that don't fit LC

    225990054 - maybe PC with period 4.869; start at 2674.2

    225438573 - maybe outburst at 2692.03

    224453162 - maybe dip at 2678.49

    223832867 - GDOR

    223341215 - looks like RR lyr ( maybe contamination )

    223802647 - looks like RR lyr ( maybe contamination )

    223665374 - periodic variable of some sort

    223573464 - looks like RR lyr ( maybe contamination )

    223192670 - look similiar to 223096357 contamination by RR lyr

    223096357- interesting LC

    221938867 - interesting LC; multiple dips; check later with more corrected data

    224450714 - interesting drop at 2685.762

    Doubtful dips

    224387244 - maybe EB ; two dips ; 2675.81 and 2721.759

    225452539 at 2688.94

    224382041 at 2689.185

    224319871 - at 2733.315

    223096777 at 2693.59

    222996651 at 2693.1

    222759976 - at 2688.79 and 2684.29 and 2691.08630

    222037354 - at 2690.7

    226298559 at 2672.9810

    223257422 - dip at 2707.54?

    223004149 - long dip at 2692.905

    222865889 - at 2689.27 and at 2677.80 also at 2674.20 and 2686.99944

    222753500 at 2724.44

    222513336 at 2668.535

    222393846 - maybe dips at 2707.5 and 2734.47

    222076670 - dips at 2698.87 and 2707.0

    222001341 - maybe 3 dips; period 2707.03 and 2726.8

    221312395 - possible dips at 2690.9 and 2692.547

    From C92

    PC

    200069908 - period 1.245 i.e. 2723.90, 2725.15

    200069718 - some dips with period 1.705 i.e. 2726.13

    200070955 - period ~8.405

    EB's (most of the look like contamination) EPIC

    248368796 - two dips 2713.65 and 2721.50

    200070470

    200070467

    200070379

    200070307

    200070279 likely contamin

    200070253

    200070183

    200070175 likely contamin

    200070003

    200069866 this one could be real

    200069773

    200069706

    200069686

    200069680

    200069462

    Flare, SSO, Lens EPIC

    222513336

    200069787 at 2750

    200069325

    200069159

    200069067

    200069031

    200069015

    doubtful dips EPIC

    225484591 at 2719.20

    224336179 - two dips 2700.37 and 2730.27

    200070019 at 2727.28

    200069941 at 2725.68

    Other EPIC

    201403105 - interesting inverse transit at 2748.32

    248368827 - contamination by RR lyr

    248368725 - contamination by RR lyr

    226144734 - maybe Cepheid

    248368665 - interesting pulsation

    224669306 - interesting pulsation

    248368872 - interesting pulsation

    224332620 - GDOR

    227373493 - interesting pulsation

    222541897 - maybe EB

    Cepheid EPIC

    224182751 - C

    Posted

  • zoo3hans by zoo3hans

    Well, I start with the C91_non22 numbers, data courtesy of Mark Omohundro (ajamyajax) (and NASA of course):
    Also from the C92 files:

    PC candidates

    200069469 P=2.53 days, starting at BKJD 2699.86, duration 7 hours, depth 0.003.

    200069478 P=4.638 days, starting at BKJD 2668.88, duration 4 hours, depth 0.0023.

    200069591 P=4.422 days, starting at BKJD 2672.06, duration 6.5 hours, depth 0.006, rather V-shaped though.

    200069689 P=1.84 days, starting at BKJD 2669.50, duration 7 hours, depth 0.0017.

    200069691, single transit at BKJD 2731.67, duration about 13 hours, depth 0.006.

    200069692 P=0.827 days, starting at BKJD 2668.177, duration 4 hours, depth 0.0011, rather V-shaped, so it might be an EB instead.

    200069732 P=2.545 days, starting at BKJD 2668.95, duration 8.5 hours, depth 0.004.

    200069840, P=5.785 days, starting at BKJD 2698.24, duration 5 hours, depth 0.006, U-shaped.

    200069842 P=46.38 days, transit at 2677.01 and 2723.39, duration 5 hours, depth 0.005.

    200070477 P=14.88 days, duration about 6 hours, depth 0.002, at BKJD 2670.67 and 2685.55. Another single and deeper possible transit at BKJD 2680.8, duration about 21 hours, depth 0.003.

    200070880 P=4.42 days, starting at BKJD 2669.32, duration about 5.5 hours, depth 0.002.

    200070955 P=8.405 days, starting at BKJD 2700.3, duration 11 hours, depth 0.0009, nicely U-shaped. Mentioned by Ivan as "doubtful".

    200071225 P=4.03 days, starting at BKJD 2671.33, duration about 6 hours, depth 0.004.

    200071367 P=4.028 days, starting at BKJD 2699.535, duration about 6 hours, depth 0.005, U-shaped.

    200071486, P=0.944 days, starting at BKJD 2698.525, duration about 4 hours, depth 0.007.

    222076670 P=29.465 days, starting at BKJD 2692.42, duration about 3-4 hours, depth 0.015. Other dips as well. Mentioned by Ivan.

    222579973 P=6.057 days, starting at BKJD 2671.5, duration 11.5 hours, depth 0.022. Mentioned by Ivan as an EB.

    222830313 P=1.626 days, starting at BKJD 2698.64, duration 3.5 hours, depth 0.0012. Mentioned by Ivan as "contamination".

    227007143 P1=11.615 days, starting at BKJD 2704.12, duration 9 hours, depth 0.010, fairly U-shaped. P2=9.37 days, starting at BKJD 2699.64, duration 3 hours, depth 0.002. Mentioned by Ivan as "some big dips that don't fit LC".

    248368841 P=22.58 days, starting at BKJD 2699.22, duration 9 hours, depth 0.011, very U-shaped. This is also a RR_Lyrae (in GO9916).

    EB candidates

    200069479 P=2.531 days, duration 7.5 hours, depth 0.04.

    200069674 P=10.19 days, duration about 13 hours, depth 0.0009, eccentrical orbit.

    200069676 P=8.21 days, duration about 11 hours, alternating depths 0.008/0.003.

    200069708 P=2.02 days, duration 4.5 hours, alternating depths 0.014/0.003.

    200069866 P=1.6927 days, duration about 10 hours, depth 0.023, very V-shaped.

    200069945 P=3.68 days, duration 6 hours, alternating depths 0.011/0.007.

    200070005 P=0.4467 days, duration about 5 hours, depth 0.03, slightly alternating depths.

    200070058/20070059 transit at BKJD 2670.17, duration 8 hours, depth 0.035, repeat at 2712.12, which gives a period of 41.95 days.

    200070175 P=2.22 days, duration 10 hours, alternating depths 0.006/0.001.

    200070192 P=1.899 days, depth about 0.03, semi-detached EB.

    200070299, P=2.0725 days, duration 7 hours, depth 0.018.

    200070334 P=1.20765 days, duration 5.5 hours, alternating depths 0.017/0.0025.

    200070397 P=3.057 days, duration about 9 hours, alternating depths 0.095/0.045.

    200070491 P=1.1367 days, duration about 5 hours, depth only 0.0006, so might be a PC instead, although I think I see very shallow secondary dips in between.

    200070627 P=3.5717 days, duration 6 hours, depth 0.03.

    200071158 P=0.849 days, duration about 4 hours, depth 0.0305.

    200071513 P=2.345 days, duration 4.5 hours, depth 0.11.

    221312395 P=3.224 days, duration 5.5 hours, starting at BKJD 2673.2 (primary eclipse).

    221937241 P=1.004 days, duration 4 hours, depth 0.035.

    223252417 P=22.17 days, nice giant EB, as noted by Mark and Ivan

    224314197 P=0.285 days, duration 3.5 hours, depth 0.04, slightly alternating depths.

    222556570 P=1.85 days (or maybe double this value).

    227515758 P=12.926 days, duration 8 hours, depth 0.19. Mentioned by Ivan.

    248368785 P=10.01 days, very eccentrical orbit, duration 5.5 hours and 9.5 hours, depth 0.0045 and 0.005. At BKJD 2703.58 / 2722.59 and 2707.52 / 2726.46. It's also a big Cepheid (in GO9915). Mentioned by Ivan as a "possible eb with 18d period".

    248368917 massive dip at BKJD 2676.5 (depth 0.15). Also at 2715.61 (depth 0.18) and 2676.50 (depth 0.15). So it's an EB with period 58.67 days.

    RR_Lyrae

    200071463

    223999125 (in GO9916)

    228368665 maybe a RR_Lyrae (or contamination by one)

    228368684 maybe a RR_Lyrae (or contamination by one)

    248368824 (in GO9916)

    248368825 (in GO9916)

    248368827 (in GO9916)

    248368828 (in GO9916)

    248368880 (in GO9916)

    248368881 (in GO9916)

    248368898 (in GO9916)

    Cepheids

    223315054 Cepheid (in GO9915)

    223557439 Cepheid (in GO9915)

    223665374 Cepheid (in GO9915)

    224356281 Cepheid (in GO9915)

    224544080 Cepheid (in GO9915)

    225072880 Cepheid (in GO9915)

    225251264 Cepheid (in GO9915)

    225452539 Cepheid (in GO9915)

    225623685 Cepheid (in GO9915)

    225643897 Cepheid (in GO9915)

    226007518 Cepheid (in GO9915)

    226144734 Cepheid (in GO9915)

    226320054 Cepheid (in GO9915)

    248368782 Cepheid (in GO9915)

    248368791 in GO9915 (Cepheids), but may show a microlensing event at BKJD 2687.5. Otherwise it must be some object crossing the field, say planet Mars or the like.

    248368800 Cepheid (in GO9915), but with strange additional dips everywhere

    248368801 Cepheid (in GO9915)

    248368804 Cepheid (in GO9915)

    248368806 Cepheid (in GO9915)

    248368809 Cepheid (in GO9915)

    248368812 Cepheid (in GO9915)

    DSCT

    224343392

    224428514

    224450496

    Other

    200069726 maybe triple system, in any case some regular dips, so at least an EB.

    224328215 very nice triple or quadruple system (mentioned as EB by Ivan). P1=10.385 days, P2=1.367 days (could also be a HJ, duration about 9 hours, depth 0.018).

    224340256 maybe single transit at BKJD 2689.43, duration 4 hours, depth 0.005.

    224757434 maybe a microlensing event at BKJD 2675.77.

    227305488 is in the GO9914 program "K2 Asteroseismology of hot magnetic stars", but it looks like a Cepheid to me.

    227028693 in GO9902 "Symbiotic Stars in the Campaign 9 field"

    248368792 single dip at BKJD 2686.1, duration 3.5 hours, depth 0.002.

    248368829 asteroid crossing at BKJD 2680.358.

    248368916 asteroid/planet crossing at BKJD 2675.78.

    Posted

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

    221312395 is in the GO program 9915 "Classical and Type II Cepheids in the Galactic Bulge". Other EPIC's listed in the same program:

    222668291

    222343049

    227916945

    227267697

    226412831

    226377509

    225322328

    222429836

    223665374

    Posted

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

    228147439 is the GO proram 9916 "RR Lyrae Stars in the Galactic Bulge". Other EPIC's found in the same program:

    225945064

    222691358

    222229673

    223802647

    226742010

    (but there are a lot more there -> Ivan go for them!)

    Posted

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

    BTW how do view non 22 prefix LCs?

    Posted

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

    I'v got them from Mark of course. Maybe you should write him about them.

    Posted

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

    I think we are all square now. If anyone else wants to take a look though, just send me a msg. But note this MC data is just one small step above the first PDC corrections (which still really helps). Credit: NASA, the Kepler Team, and the Archive folks for all their great work there. Thank you!!!

    Posted

  • ajamyajax by ajamyajax

    Re 224389138 from Ivan's list: and certainly a warm or hot Jupiter seems possible here. Of course a good bit of that depends on the size of the host star. Maybe Shellface can take a closer look at this one later.

    s1=2673.365 p1=5.9265 d1=0.195833 (4.70 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)

    224389138 , 2MASS J18034454-2419588 , 11.475 , 11.062 , 10.808 , 0.413 , 0.254 , ('K1V', 0.86) , ('M4V',0.24)

    au min-max 0.07 0.075

    stellar diameter in solar units min-max 1.525 1.705

    stellar mass in solar units min-max 1.3 1.605

    period in days min-max 5.922 5.933

    duration in hours min-max 4.6 4.799

    From NEA, K2 Targets within search area:

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

    224389138 270.9356 -24.333 0.0 13.886 9

    224392324 270.9258 -24.3272 38.4 14.231 9

    224394353 270.9161 -24.3236 72.29 13.848 9

    224389484 270.9113 -24.3325 79.81 14.527 9

    224393028 270.9113 -24.3259 83.6 14.821 9

    224386961 270.9612 -24.337 85.32 14.339 9

    224379078 270.8999 -24.351 133.87 14.371 9

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

    224389138,2MASS J18034454-2419588,270.935578,-24.333025,,,,13.886,-4.500,-8.500,

    F1

    Posted

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

    225102663 is in the GO program GO9923 "Asteroseismology of the Brightest K2 Stars". It's clearly a Cepheid (as mentioned by Ivan).

    Posted

  • Artman40 by Artman40

    http://ssc.spitzer.caltech.edu/warmmission/scheduling/approvedprograms/ddt/13156.txt

    Microlensing follow-up accepted for Spitzer's DDT program.

    Posted

  • ajamyajax by ajamyajax

    Re 224825377 as a flare or lens event: well with C9 it seems like a good idea to take a closer look at all the possible lensing candidates... But so far anyway I've seen only SSO's. Maybe 2000 XF49 in this case. This one is a bit different, either because of the angle of crossing perhaps or because it is Mars instead. So the search continues.

    K2 ephemeris for 2000 XF49 from JPL/Horizons...

    Object '2000 XF49' is visible in C9 (mag 20.5..21.4; 7.3..36.1"/h; ra 265.506..275.879; dec -26.082..-22.860).

    Object '2000 XF49' is visible in C11 (mag 20.6..21.4; 1.1..32.3"/h; ra 259.329..268.948; dec -29.296..-29.033).

    AN1

    Posted

  • ajamyajax by ajamyajax

    Re 223254456 from our list: I'm sure this busy field has complicated many observations, but Kepler shows this target is a binary and not an RR Lyrae variable as is in the current record. There could be a blended period from another such source, or a nearby binary though. Or this could be a trinary. But with all the activity the former seems a bit more likely.

    s1=2668.63 p1=1.197 d1=0.12 (2.88 hours +/-)

    s2=2669.228 p2=1.197 d2=0.12 (2.88 hours +/-)

    s3=2668.56 p3=0.4915 d3=0.10 (2.4 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)

    223254456 , 2MASS J18092224-2616214 , 13.426 , 12.635 , 12.482 , 0.791 , 0.153 , ('L0V', '...') , ('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

    223254456 272.3428 -26.2726 0.0 15.643 9

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

    223254456,2MASS J18092224-2616214,272.342791,-26.272611,,,,15.643,-20.400,-13.300,

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

    0.03 OGLE-BLG-RRLYR-14607 -- 18 09 22.38 -26 16 20.9 Sgr RRAB 0.49088584 16.188 (0.785) Ic

    2.12 MACHO 178.22747.916 -- 18 09 20.22 -26 18 25.4 Sgr RRAB 0.48144152 16.683 (0.633) I

    https://www.aavso.org/vsx/index.php?view=detail.top&oid=267629

    Listed as OGLE BLG-RRLYR-14607 -- Variable Star of RR Lyr type on Simbad, 18 09 22.38 -26 16 20.9

    T1
    T2

    Posted

  • Dolorous_Edd by Dolorous_Edd

    From C92

    PC

    221887964 - maybe dips with 2.331 period

    221312395 - with new data dips period 1.611

    Cepheid and RR lyr EPIC

    226479027 - maybe C

    226338470 - maybe C

    226007518 - maybe C

    227315843 - C

    222365259 - C

    200069364

    EB's EPIC

    248368917 - 3 dips at 2715.60 ; 2730.27; 2735.2062

    227515758 - period ~12.9

    227115126 - period ~6.5d

    227108971 - maybe EB

    227007143 - with new data period 11.638d

    226927839 - possible HB with ~4d period

    226609366 - dips with ~17d period

    225382260 - period 2.940

    224177119 - dip at 2716.1910

    222440330 - maybe EB

    200070068 - EB period 4.116

    200069427

    200069380

    200069303

    SSO,Flare,Lens EPIC

    248368778 at 2716.55

    226865747 at 2722.74

    227553507 at 2734.19

    226263932 at 2704.390

    225377677 at 2722.05 and 2722.88

    224380202 at 2736.07 and 2738.76

    224361631 - 2 similiar features; at 2703.67 and 2728.89 also at 2725.499

    224353581 at 2719.90

    224314764 at 2726.31 and 2733.53

    224297601 at 2706.24 and 2723.149

    200069325 at 2737.48

    200069159 at 2707.05 and 2711.10 and 2730.036 and 2739.037

    200069111 at 2727.60

    200069067 at 2725.30

    200069029 at 2723.098

    200069015 at 2722.291

    200069013 at 2707.59; 2707.59 ; 2709.7 ; 2710.28 ; 2710.5; 2710.7 ; 2711.481; 2713.71; 2719.56; 2722.148

    200068993 at 2720.92

    200068931 at 2716.661

    200068799 at 2702.47

    Doubtful dips EPIC

    248368785 - possible eb with 18d period

    224412458 - dips with 1.573d period

    222901159 - at 2700.44; 2726.214; 2730.189

    224444934 at 2709.71 and 2738.35

    222569485 - maybe period 0.749 ; i.e. 2726.55, 2727.2, 2728.06

    200068787 - dip at 2727.16

    Maybe contamination EPIC

    222830313 - period 1.626

    248368898 - with new data looks like contamination from RR lyr

    248368684 - with new data looks like contamination from RR lyr

    222406832 - with new data looks like contamination from RR lyr

    222038957 - with new data looks like contamination from RR lyr

    221938867 - with new data looks like contamination from RR lyr

    221937241- period ~d

    200069442

    Other EPIC

    228248761 - very interesting raise at the end

    227420856 - interesting decrease in flux over time

    248368801 - periodic variable

    227206884 - very interesting raise at 2712.820, maybe also dips

    227028693 - very interesting raise at 2712.820

    226373479 - maybe GDOR

    225448198 - maybe GDOR

    224427127 - maybe GDOR

    224332620 - maybe GDOR

    224314265 - maybe GDOR

    222643038 - maybe GDOR

    Posted

  • ajamyajax by ajamyajax

    Re 223252417 from our list: and a possible slightly eccentric binary with fairly long durations here. It seems to be a suspected binary as listed on VSX, but the c92 data certainly helps constrain the period. Also note in the NEA search results this target and several others nearby are on the current campaign 11 list.

    s1=2684.445 p1=22.16 d1=1.55 (37.2 hours +/-)

    s2=2673.48 p2=22.16 d2=1.20 (28.8 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)

    223252417 , 2MASS J17495040-2616330 , 11.020 , 10.260 , 9.988 , 0.76 , 0.272 , ('M9V', 0.065) , ('M3V',0.4)

    From NEA, K2 Targets within search area:

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

    223252417 267.46 -26.2758 0.0 13.715 9

    223252417 267.46 -26.2758 0.04 13.715 11

    244688516 267.4692 -26.2644 50.64 15.796 11

    223239781 267.4613 -26.2961 73.05 11.441 11

    223233950 267.4824 -26.3055 128.79 13.085 11

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

    223252417,2MASS J17495040-2616330,267.460039,-26.275826,,,,13.715,-1.500,-4.200,

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

    0.64 NSV 9723 -- 17 49 47.70 -26 16 45.0 Sgr E -- 15.7 - 16.5 p

    https://www.aavso.org/vsx/index.php?view=detail.top&oid=48347

    T1

    Posted

  • ajamyajax by ajamyajax

    Re 224466741: is a known binary designated as HD 165246 but notable because it contains a rare O-type star.

    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)

    224466741 , 2MASS J18060468-2411437 , 7.306 , 7.288 , 7.231 , 0.018 , 0.057 , ('A3V', 2.0) , ('F6V',1.25)

    From NEA, K2 Targets within search area:

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

    224466741 271.5195 -24.1955 0.0 8.414 9

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

    224466741,2MASS J18060468-2411437,271.519496,-24.195523,,,,8.414,-0.500,-1.900,

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

    0.00 V5631 Sgr 000-BLX-071 18 06 04.68 -24 11 43.9 Sgr EA 4.5928 7.70 - 7.81 V

    Listed as HD 165246 -- Star on Simbad, Proper motions mas/yr: -0.5 -1.9, Spectral type: O8V

    "HD 165246: an early-type binary with a low mass ratio... and is a double-lined spectroscopic binary..."

    "As an earlier finding revealed, HD 165246 is also an eclipsing system. We were able to derive consistent orbital and light-curve solutions and all basic physical properties of the system. The period of this O8 V + B7 V binary is 4.592706..."

    From: http://www.aanda.org/articles/aa/abs/2013/02/aa20388-12/aa20388-12.html

    https://en.wikipedia.org/wiki/O-type_star

    T1

    Posted

  • ajamyajax by ajamyajax

    Re 227719084 from Ivan's list: currently on record as a variable, but appears to be an eccentric binary with a heartbeat signature. The primary appears to be a A or B-type star. And this is only a c92 data view. Also note Simbad has this target listed as a class II bright giant.

    s1=2700.40 p1=4.446 d1=0.50 (12.0 hours +/-)

    s2=2701.93 p2=4.446 d2=0.4375 (10.5 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)

    227719084 , 2MASS J18223997-1724369 , 8.601 , 8.513 , 8.476 , 0.088 , 0.037 , ('A9V', 1.66) , ('A3V',2.0)

    From NEA, K2 Targets within search area:

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

    227719084 275.6665 -17.4103 0.0 9.396 9

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

    227719084,2MASS J18223997-1724369,275.666538,-17.410258,,,,9.396,-0.700,-2.900,

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

    0.00 GDS_J1822399-172436 -- 18 22 39.96 -17 24 36.8 Sgr VAR -- 9.37 (0.28) r

    Listed as HD 168862 -- Star on Simbad, Spectral type: B3II, 18 22 39.9685 -17 24 36.906

    T1
    F1

    Posted

  • ajamyajax by ajamyajax

    Re 224328215 from Ivan's and Hans Martin's lists: this target is in a cluster of YSO's with a Orion variable nearby, and more apparently. And that might be as close as we can get to identifying the star type. But there could be a trinary or more here as mentioned. Since only a faint sign at best of contamination in the other nearby EPICs, this target seems to be the most likely source of these transits and/or transit like events of the EPICs listed here anyway.

    s1=2668.04 p1=1.3665 d1=0.35 (8.4 hours +/-)

    s2=2673.395 p2=10.394 d2=0.55 (13.2 hours +/-)

    s3=2668.21 p3=10.394 d3=0.45 (10.8 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)

    224328215 , 2MASS J18043086-2426344 , 11.742 , 11.022 , 10.760 , 0.72 , 0.262 , ('M8V', 0.082) , ('M3V',0.4)

    From NEA, K2 Targets within search area:

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

    224328215 271.1286 -24.4428 0.0 13.957 9

    224328571 271.1215 -24.4422 23.41 16.086 9

    224322753 271.1404 -24.4527 52.29 13.822 9

    224321494 271.1384 -24.455 54.08 14.064 9

    224319597 271.1472 -24.4584 82.74 14.281 9

    224314265 271.1434 -24.4682 103.33 11.980 9

    224330915 271.0968 -24.438 105.94 9.174 9

    224317352 271.1043 -24.4626 106.93 11.487 9

    224327080 271.1686 -24.4449 131.05 16.289 9

    224308209 271.128 -24.4793 131.43 13.879 9

    224317366 271.0889 -24.4625 148.36 15.046 9

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

    224328215,2MASS J18043086-2426344,271.128650,-24.442844,,,,13.957,1.500,4.200,

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

    0.18 V1793 Sgr 000-BFG-210 18 04 30.92 -24 26 44.9 Sgr IN -- 17.1 - 17.8 p

    https://www.aavso.org/vsx/index.php?view=detail.top&oid=29493

    "Type IN: Orion variables. Irregular, eruptive variables connected with bright or dark diffuse nebulae or observed in the regions of these nebulae. Some of them may show cyclic light variations caused by axial rotation. In the Spectrum-Luminosity diagram, they are found in the area of the main sequence and subgiants. They are probably young objects that, during the course of further evolution, will become light-constant stars on the zero-age main sequence (ZAMS). The range of brightness variations may reach several magnitudes. "

    And from Simbad, n arcsecs away:

    0.33: 2MASS J18043086-2426344 -- Young Stellar Object on Simbad, 18 04 30.87 -24 26 34.4

    10.85: V* V1793 Sgr -- Variable Star of Orion Type, 18 04 30.92 -24 26 44.9

    plus many more nearby objects...

    T1

    Posted

  • ajamyajax by ajamyajax

    Re 224351176 from Ivan's list: this target could be contaminated by nearby OGLEII DIA BUL-SC13 (0.50 arcsecs away), however it is the brighter or closer object so would like to see the SC13 light curve also.

    s1=2669.8 p1=4.756011 d1=0.45 (10.8 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)

    224351176 , 2MASS J18172484-2424043 , 8.727 , 8.560 , 8.490 , 0.167 , 0.07 , ('F4V', 1.37) , ('G1V',1.07)

    From NEA, K2 Targets within search area:

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

    224351176 274.3536 -24.4012 0.0 9.582 9

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

    224351176,2MASS J18172484-2424043,274.353560,-24.401226,,,,9.582,6.800,1.800,

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

    0.50 OGLEII DIA BUL-SC13 V0136 -- 18 17 22.95 -24 23 49.1 Sgr E 4.756011 --

    0.54 OGLEII DIA BUL-SC13 V0145 -- 18 17 25.83 -24 23 34.7 Sgr E 1.604154 15.46 - ? Ic

    0.57 OGLE BUL-SC13 V0084 -- 18 17 24.30 -24 24 37.9 Sgr E 0.403918 15.88 - ? Ic

    Posted

  • ajamyajax by ajamyajax

    Re 224493585 from Ivan's list: another YSO or a YSO candidate at least that also appears to be a binary.

    s1=2672.11 p1=5.5945 d1=0.57083 (13.7 hours +/-)

    s2=2669.305 p2=5.5945 d2=0.57083 (13.7 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)

    224493585 , 2MASS J18022376-2408492 , 13.223 , 12.287 , 11.863 , 0.936 , 0.424 , ('L2V', '...') , ('M7V',0.098)

    From NEA, K2 Targets within search area:

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

    224493585 270.599 -24.147 0.0 14.550 9

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

    224493585,2MASS J18022376-2408492,270.599026,-24.147018,,,,14.550,,,

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

    0.21 [HHR2012] J180224.2-240860 -- 18 02 24.24 -24 08 59.7 Sgr VAR -- 13.11 (0.33) r

    Listed as 2MASS J18022376-2408492 -- Young Stellar Object Candidate on Simbad, 18 02 23.766 -24 08 49.26

    F1

    Posted

  • Artman40 by Artman40

    Should YSO candidates be reported to Disk Detective project?

    Posted

  • ajamyajax by ajamyajax

    I imagine any listings on VSX or Simbad mean they are already known.

    Posted

  • ajamyajax by ajamyajax

    Re 224417043 from Ivan's list: and a fascinating T Tauri/YSO target in a cluster of such objects, if the c92 data shown is the most accurate PDC flux correction. Note what you see here is not this distinct in other parts of c92 nor in c91.. However if correct, it is possible there is a rotating disk here with a primary period of ~3.85 days.. Plus a number of shorter quasi-periodic transit-like events within that period.

    So obviously it will be interesting to revisit this target later with more corrected data, as well as several neighbors that could also be a T Tauri or a binary.

    s1=2703.47 p1=3.85 d1=3.5 (84 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)

    224417043 , 2MASS J18035526-2417000 , 12.467 , 11.922 , 11.752 , 0.545 , 0.17 , ('K4V', 0.78) , ('K7V',0.64)

    From NEA, K2 Targets within search area:

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

    224417043 270.9803 -24.2833 0.0 14.115 9

    224418655 270.9927 -24.2804 42.29 14.584 9

    224400629 270.9868 -24.3125 107.34 8.148 9

    224419164 270.9453 -24.2794 115.47 10.907 9* possible T Tauri...

    224419741 271.0213 -24.2784 135.68 16.171 9

    224396425 271.0003 -24.32 147.46 15.014 9

    224412309 271.0248 -24.2917 149.1 14.666 9* possible binary...

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

    224417043,2MASS J18035526-2417000,270.980265,-24.283324,,,,14.115,-2.200,1.000,

    From VSX:

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

    0.01 Cl* NGC 6530 WFI 28700 -- 18 03 55.24 -24 17 00.1 Sgr TTS/ROT 1.94983 14.700 - ? V

    "Type ROT: T Tauri stars showing periodic variability due to spots. For those members of this class where special features are well known, the subtype classifications of CTTS/ROT or WTTS/ROT may be applied. Where not precisely known, the subtype of TTS/ROT is used."

    Listed as 2MASS J18035526-2417000 -- Young Stellar Object on Simbad, Spectral type: K4-K5V, 18 03 55.27 -24 17 00.0

    T1

    Posted

  • ajamyajax by ajamyajax

    And just a few more closer looks at possible binaries here...

    Re 222267075 from our list: another possible binary as seen in the c9 data. Transit depth ~4.72%.

    s1=2668.685 p1=1.20476 d1=0.3125 (7.5 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)

    222267075 , 2MASS J18104534-2744347 , 13.215 , 12.618 , 12.447 , 0.597 , 0.171 , ('K5V', 0.75) , ('K7V',0.64)

    From NEA, K2 Targets within search area:

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

    222267075 272.6889 -27.743 0.0 15.164 9

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

    222267075,2MASS J18104534-2744347,272.688906,-27.742984,,,,15.164,-79.200,48.000,

    T1

    Re 225191577: interesting because an unusual ApSi spectral type for this ~P=2.42 periodic and regular variable binary. Transit depth ~2.0%.

    s1=2668.73 p1=2.25663 d1=0.28 (6.72 hours +/-)

    s2=2669.86 p2=2.25663 d2=0.28 (6.72 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)

    225191577 , 2MASS J18002414-2257521 , 9.363 , 9.330 , 9.261 , 0.033 , 0.069 , ('A7V', 1.76) , ('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

    225191577 270.1006 -22.9645 0.0 9.910 9

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

    225191577,2MASS J18002414-2257521,270.100608,-22.964474,,,,9.910,-0.300,-2.600,

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

    0.25 [HHR2012] J180023.4-225803 -- 18 00 23.38 -22 58 03.2 Sgr VAR -- 11.25 (0.15) i

    Listed as HD 164068 -- Star on Simbad, Proper motions mas/yr: -1.70 -5.70, Spectral type: ApSi, 18 00 24.1484 -22 57 52.169

    T1

    Re 224430834 from Ivan's list: possible short period binary at P=0.301849 (or an interval of this period), if not a periodic variable. Transit depth ~1.41%.

    s1=2668.17 p1=0.301849 d1=0.12 (2.88 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)

    224430834 , 2MASS J18023207-2415318 , 13.196 , 11.812 , 10.918 , 1.384 , 0.894 , ('', 0.0) , ('',0.0)

    From NEA, K2 Targets within search area:

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

    224430834 270.6336 -24.2589 0.0 14.523 9

    224432834 270.6609 -24.2554 90.54 7.293 9

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

    224430834,2MASS J18023207-2415318,270.633593,-24.258870,,,,14.523,-6.500,5.500,

    Image not shown.

    Re 224412309 from Ivan's list: possible short period binary at P=0.374951 (or an interval of this period), if not a periodic variable or contamination. Transit depth ~0.44%.

    s1=2668.27 p1=0.374951 d1=0.15 (3.6 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)

    224412309 , 2MASS J18040594-2417302 , 12.935 , 12.623 , 12.502 , 0.312 , 0.121 , ('G6V', 0.97) , ('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

    224412309 271.0248 -24.2917 0.0 14.666 9

    224419741 271.0213 -24.2784 49.45 16.171 9

    224418655 270.9927 -24.2804 112.77 14.584 9

    224403700 271.0548 -24.307 112.83 13.828 9

    224419990 271.0596 -24.278 124.61 12.571 9

    224396425 271.0003 -24.32 129.51 15.014 9

    224400629 270.9868 -24.3125 145.16 8.148 9

    224410960 271.0692 -24.2941 146.19 15.536 9

    224417043 270.9803 -24.2833 149.1 14.115 9

    224420797 271.0672 -24.2766 149.47 12.495 9

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

    224412309,2MASS J18040594-2417302,271.024754,-24.291740,,,,14.666,-6.900,-3.800,

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

    0.22 Cl* NGC 6530 WFI 27470 -- 18 04 06.48 -24 17 41.3 Sgr TTS/ROT 0.18743 17.948 - ? V

    Image not shown.

    Re 224314197 from Hans Martin's list: possible short period binary at P=0.142924 (or an interval of this period), if not a periodic variable or contamination.

    s1=2668.27 p1=0.142924 d1=0.07 (1.68 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)

    224314197 , 2MASS J18032593-2428060 , 13.565 , 13.015 , 12.852 , 0.55 , 0.163 , ('K4V', 0.78) , ('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

    224314197 270.8581 -24.4684 0.0 15.340 9

    224332620 270.8441 -24.4349 129.01 11.858 9

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

    224314197,2MASS J18032593-2428060,270.858105,-24.468383,,,,15.340,-4.100,-9.600,

    Image not shown.

    Re 226547563 from Ivan's list: as seen in the Aladin Lite image, these coordinates do not align with a visible star. But there are number of objects listed on Simbad at this location. Apparently it is considered an O-type cluster with the investigating proposal indicating that as well. So the transit seems to be the primary from one of these faint objects or a nearby binary.

    s1=2668.59 p1=0.7176 d1=0.195833 (4.7 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)

    226547563 , 2MASS J18092601-2019311 , 13.404 , 11.246 , 10.229 , 2.158 , 1.017 , ('', 0.0) , ('',0.0)

    From NEA, K2 Targets within search area:

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

    226547563 272.3584 -20.3253 0.0 14.730 9

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

    226547563,2MASS J18092601-2019311,272.358399,-20.325306,,,,14.730,,,

    Listed as 2MASS J18092601-2019311 -- Star in Cluster on Simbad, Spectral type: O3-4V, 18 09 26.02 -20 19 31.1

    "GO9918 Kalari Wind clumping in O stars"

    https://keplerscience.arc.nasa.gov/data/k2-programs/GO9918_Kalari.pdf

    AL1
    F1

    Re 227515758 from Ivan's and Hans Martin's lists: eccentric A or B-type component binary with the better quality transits visible in c92.

    s1=2676.096 p1=12.926 d1=0.80 (19.2 hours +/-)

    s2=2670.987 p2=12.926 d2=0.30 (7.2 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)

    227515758 , 2MASS J18180467-1757273 , 9.453 , 9.412 , 9.413 , 0.041 , -0.001 , ('A5V', 1.9) , ('B7V',3.9)

    From NEA, K2 Targets within search area:

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

    227515758 274.5195 -17.9576 0.0 9.730 9

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

    227515758,2MASS J18180467-1757273,274.519487,-17.957589,,,,9.730,-0.300,4.300,

    Listed as HD 167902 -- Star on Simbad, Proper motions mas/yr: -0.5 1.2, Spectral type: B3V, 18 18 04.677 -17 57 27.31

    "GO9907 Pápics Probing the Internal Mixing Processes and Angular Momentum Transport in B-type Hybrid Pulsators on the Main Sequence"

    https://keplerscience.arc.nasa.gov/data/k2-programs/GO9907_Papics.pdf

    Image not shown.

    Re 248368785 from Ivan's and Hans Martin's list: dim 17.100 KepMag ecccentric binary, but little other information available.

    RA/Dec 272.4325400, -25.3790800 and a number of periodic objects listed on VSX and the usual busy c9 field there and on Simbad.

    s1=2703.58 p1=19.01 d1=0.20 (4.8 hours +/-)

    s2=2707.47 p2=19.01 d2=0.40 (9.6 hours +/-)

    "GO9915 Plachy Classical and Type II Cepheids in the Galactic Bulge"

    Image not shown.

    Re 248368917 from Hans Martin's list: an eccentric binary at 10.531 Kepmag and this C9 targeting appears to be for a Wolf-Rayet Star.

    RA/Dec 270.1430000, -22.7942000

    s1=2676.50 p1=58.72 d1=2.5 (60.0 hours +/-)

    s2=2715.60 p2=58.72 d2=4.1 (98.4 hours +/-)

    0.89 arcsecs away per Simbad, WR 102l -- Wolf-Rayet Star, Spectral type: WN, 18 00 34.33 -22 47 40.0

    "GO9922 Cao Exploring Pulsations of Wolf-­Rayet Stars"

    "The classification of Wolf Rayet spectra is complicated by the frequent association of the stars with dense nebulosity, dust clouds, or binary companions."

    From: https://en.wikipedia.org/wiki/Wolf–Rayet_star

    F1

    Re 222830313 from Hans Martin's and Ivan's lists: very busy apparent lensing target field which also seems to have a periodic transit. So this could be contamination from a number of sources, but there might be a chance for a PC here.

    s1=2669.372 p1=1.6262 d1=0.125 (3.0 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)

    222830313 , 2MASS J18060347-2655172 , 12.747 , 11.866 , 11.605 , 0.881 , 0.261 , ('L3V', '...') , ('M3V',0.4)

    au min-max 0.03 0.03

    stellar diameter in solar units min-max 1.5 1.61

    stellar mass in solar units min-max 1.35 1.375

    period in days min-max 1.619 1.633

    duration in hours min-max 2.901 3.099

    From NEA, K2 Targets within search area:

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

    222830313 271.5145 -26.9215 0.0 15.502 9

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

    222830313,2MASS J18060347-2655172,271.514467,-26.921476,,,,15.502,328.000,412.000,

    At 23.85 arcsecs: MOA-TR 8 -- (Micro)Lensing Event on Simbad, 18 06 02.26 -26 55 34.8

    "GO9919 Asplund Dating the oldest stars: Asteroseismology of Milky Way bulge stars from redshifts z>10"

    https://keplerscience.arc.nasa.gov/data/k2-programs/GO9919_Asplund.pdf

    F1

    Posted

  • ajamyajax by ajamyajax

    Re 227007143 from Hans Martin's and Ivan's lists: and a possible multi-planet system as identified by Hans Martin. This star is a B-type star proposal target though (see below). And Simbad lists this a possible giant and/or a double star system too. And their B5V star would be ~4.6 M_sol or possibly greater if a giant. So a trinary or a blend of several binaries is also possible here. But if this star is smaller than current estimates or these are high-impact transits, planets could be possible.

    s1=2669.315 p1=11.607 d1=0.29 (6.96 hours +/-)

    s2=2671.54 p2=9.373 d2=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)

    227007143 , 2MASS J18150113-1912275 , 8.576 , 8.586 , 8.494 , -0.01 , 0.092 , ('A2V', 2.1) , ('K0V',0.89)

    From NEA, K2 Targets within search area:

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

    227007143 273.7547 -19.2077 0.0 9.489 9

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

    227007143,2MASS J18150113-1912275,273.754682,-19.207679,,,,9.489,-6.800,1.400,

    Per VSX:

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

    0.00 ASAS J181501-1912.5 -- 18 15 01.14 -19 12 27.6 Sgr MISC 1483.9 8.712 (0.108) Ic

    Listed as HD 167247 -- Star on Simbad, Proper motions mas/yr: -6.8 1.4, Spectral type: B5III/V, 18 15 01.1231 -19 12 27.620

    And BD-19 4924C -- Star in double system at 15.61 arcsecs.

    Also notable at 149.89 arcsecs, PSR B1812-19.1 -- Pulsar, 18 15 03.08 -19 10 00.4

    "GO9907 Pápics Probing the Internal Mixing Processes and Angular Momentum Transport in B-type Hybrid Pulsators on the Main Sequence"

    https://keplerscience.arc.nasa.gov/data/k2-programs/GO9907_Papics.pdf

    T1

    Posted

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

    From Gaia:

    parallax = 1.068
    distance = 936 parsecs = 3053 ly

    Posted

  • Dolorous_Edd by Dolorous_Edd

    Re 248368917

    brr also noted it

    Posted

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

    EPIC 248368917, WR 102l Wolf-Rayet Star, SMSNPL 17

    18 00 34.32, -22 47 39.20

    "WR 102 is a Wolf-Rayet star in the constellation Sagittarius, an extremely rare star on the WO oxygen sequence."

    "It has been calculated that WR 102 will explode as a supernova within 1,500 years."

    From: https://en.wikipedia.org/wiki/WR_102

    Posted

  • ajamyajax by ajamyajax in response to Artman40's comment.

    "Citizen scientists discover place to search for exoplanets"

    by Nicole Kiefert

    http://www.astronomy.com/news/2016/10/citizen-scientists-discover-place-to-search-for-exoplanets

    Artman40, are you one of the eight?...

    Posted

  • Artman40 by Artman40

    Not in this paper. I was in the previous one.

    Posted

  • ajamyajax by ajamyajax in response to Artman40's comment.

    Nice going with the previous paper then and congratulations!

    Posted

  • ajamyajax by ajamyajax

    (Updated) here are the c9/c11 crossover candidates from k2fov 6.2:

    epic,ra,dec,kepmag,type

    225966075,262.929454,-21.531514,14.91,STAR

    225990054,262.764435,-21.485287,9.61,STAR

    226224032,264.115008,-21.02339,15.6,STAR

    226235777,263.785256,-20.99895,13.84,STAR

    226244584,264.114162,-20.980821,14.25,STAR

    226263932,263.41415,-20.941665,15.45,STAR

    226276972,264.176019,-20.914763,15.32,STAR

    226286176,263.67886,-20.895495,13.83,STAR

    226289619,263.286382,-20.888188,13.94,STAR

    226290767,264.087327,-20.885683,15.39,STAR

    226296275,264.255464,-20.8743,15.01,STAR

    226302750,263.489898,-20.860265,14.19,STAR

    226334876,264.20875,-20.793268,13.56,STAR

    226364977,263.711895,-20.730472,14.41,STAR

    226371609,263.473588,-20.716473,14.45,STAR

    226466534,263.881041,-20.511825,15.76,STAR

    226472639,264.09068,-20.497998,15.14,STAR

    226476890,264.073118,-20.488421,14.39,STAR

    226480658,263.248996,-20.479743,15.02,STAR

    226484756,264.111871,-20.470264,12.63,STAR

    226488703,263.42086,-20.461063,14.15,STAR

    226543615,264.007467,-20.334356,14.39,STAR

    226546818,264.044999,-20.327045,15.3,STAR

    226557170,264.036863,-20.303066,12.38,STAR

    226558313,263.061063,-20.30028,14.78,STAR

    226564613,263.63567,-20.285476,14.77,STAR

    226582044,263.058692,-20.244964,15.07,STAR

    226584143,264.112457,-20.240189,14.19,STAR

    226603064,263.439877,-20.196174,14.44,STAR

    226619552,264.096777,-20.157389,14.36,STAR

    226633525,263.126054,-20.124567,15.09,STAR

    226635995,263.152362,-20.118635,15.1,STAR

    226679131,263.876738,-20.015937,15.2,STAR

    226694186,263.787752,-19.979499,14.79,STAR

    226742929,263.965519,-19.860401,14.65,STAR

    226758086,263.378735,-19.822563,15.07,STAR

    226768290,262.805655,-19.796947,15.12,STAR

    226774328,263.068252,-19.781831,13.37,STAR

    226838013,263.967048,-19.623269,13.91,STAR

    226879801,263.728701,-19.519736,13.93,STAR

    226926619,263.842042,-19.402203,14.24,STAR

    226936070,263.372879,-19.37886,14.55,STAR

    223126835,266.073652,-26.473694,13.27,STAR

    223252417,267.460039,-26.275826,13.71,STAR

    223482421,266.24449,-25.899663,14.84,STAR

    223573464,267.251728,-25.749536,8.69,STAR

    224258716,266.966476,-24.569506,13.29,STAR

    224287270,267.461839,-24.517563,13.16,STAR

    Posted

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

    Just a correction during a quiet holiday period: realized the other day I could create minimally corrected light curves from selected groups of TPF pixel data. Well in the case of 223254456, the center area is indeed a RR lyr star as listed on VSX and Simbad, while the binary we predominantly see in the LC is in the lower left area as shown below.

    PX center area
    LC center area

    PX lower left area
    LC lower left area

    Posted

  • ProtoJeb21 by ProtoJeb21

    I've found a handful of possible transits in C9, two of which are already mentioned here.

    EPIC 221718350: Strong, curving dip at BKJD 2725.601650 with a depth of 51413 ppm. Might be too large for a planet.

    EPIC 222092065: Has two dips that appear to be from different objects. I'm not too sure if the second one is too wide for a transit, but I would need stellar radius to be sure, which I don't have for this star.

    EPIC 222094935: Two large transit events that could be caused by a giant planet orbiting every 37.9076 days.


    EPIC 222160975: Strong dip at BKJD 2725.59125, possibly caused by a giant planet with a year of over 70 days.

    EPIC 222265697: A small but promising looking signal lasting about 4.9 hours with a depth of about 7550 ppm.

    There were a few others I found, but I'm less confident in them:
    EPIC 222170135
    EPIC 222176508
    EPIC 222233642

    Posted