202083828 - PC or EB?

• by Dolorous_Edd

  Profile looks reasonably good, though with larger pixel mask anything is possible

  Could be even contamination from BGEB ( dips at 1947.9BKJD and 1962 are veeeeeeeeeeerrrrrrrry suspicious )

  DSS 2 Red 1' x 1' field

  

  Target is listed under GO0111_LC|GO0119_LC|GO0120_LC

  GO0111 Sanchis Ojeda DETECTION OF EARTH-SIZE PLANETS USING K2

  http://keplerscience.arc.nasa.gov/K2/docs/Campaigns/C0/GO0111_SanchisOjeda.pdf

  GO0119 Montet TARGETING M DWARFS WITH K2

  http://keplerscience.arc.nasa.gov/K2/docs/Campaigns/C1/GO1053_Montet.pdf

  GO0120 Lepine NEARBY, HIGH PROPER MOTION M DWARFS FOR THE KEPLER K2 MISSION

  Posted December 10, 2014 9:31 AM

• by Dolorous_Edd

  Also

  https://www.cfa.harvard.edu/~avanderb/k2c0/ep202083828.html

  Posted December 10, 2014 9:32 PM

• by Shellface

  Only one visible star in the aperture. The source's colours indicate a end-K spectral type (~0.6 Rsol and ~4000 K), so the transit depth suggests a radius of ~4 Rearth, or ~1 Rnept. This is an interesting candidate, but will be difficult to follow up due to the small size and faint host star.

  Posted December 10, 2014 9:36 PM

• by ajamyajax

  My guess would be planetary, but only three transits to work with on this one.

  s1=1942.163 p1=14.568 d1=0.23 (5.52 hours)

  

  Posted December 10, 2014 11:55 PM

• by Dolorous_Edd

  Keppixseries for 202083828, I guess if there is a BGEB nearby we would have seen it now

  

  Posted January 6, 2015 9:34 AM

• by Dolorous_Edd

  Redundant or not, here is the UKIRT and SDSS images

  UKIRT

  1'x1'

  

  SDSS

  

  SDSS J061649.55+243546.0

  Posted April 16, 2015 8:11 AM

• by ajamyajax

  Looks confirmed as K2-26 b now:

  http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=k2-26+b&type=CONFIRMED_PLANET

  And maybe we were too caution here, but we certainly had it spotted as a PC.

  Posted January 22, 2016 3:24 PM

• by Dolorous_Edd

  sigh .. oh well

  Posted January 23, 2016 7:56 PM

• by ajamyajax in response to Dolorous_Edd's comment.

  No worries, there are always more. : )

  Posted January 26, 2016 11:29 PM

• by ajamyajax

  Ivan, Hans Martin, Alex, et al. :

  Just noticed we can get proper motions for K2 targets here:

  http://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblSearch/nph-tblSearchInit?app=ExoTbls&config=k2targets

  Posted January 29, 2016 3:06 PM

• by zoo3hans in response to ajamyajax's comment.

  Hi Mark

  thanks, also useful to get the magnitudes of the star, say V, B, K, J, H.

  Posted January 29, 2016 4:32 PM

• by zoo3hans

  Confirmed also in http://arxiv.org/abs/1601.02706

  P=14.5665 days, R=2.67 R_Earth.

  Posted February 10, 2016 2:43 PM

• by zoo3hans

  And yet another confirmation (with the help of the Spitzer telescope):

  http://arxiv.org/abs/1603.01934

  Posted March 8, 2016 12:23 PM