J/ApJS/224/2ivo://CDS.VizieR/J/ApJS/224/2doi:10.26093/cds/vizier.22240002CDSHuber D.Bryson S.T.Haas M.R.Barclay T.Barentsen G.Howell S.B.,Sharma S.Stello D.Thompson S.E.2017-01-23T22:00:00Z2016-07-21T13:06:06ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmetallicitystellar-massesstellar-radiistellar-distancesurveysThe K2 Mission uses the Kepler spacecraft to obtain high-precision photometry over ~80 day campaigns in the ecliptic plane. The Ecliptic Plane Input Catalog (EPIC) provides coordinates, photometry, and kinematics based on a federation of all-sky catalogs to support target selection and target management for the K2 mission. We describe the construction of the EPIC, as well as modifications and shortcomings of the catalog. Kepler magnitudes (Kp) are shown to be accurate to ~0.1mag for the Kepler field, and the EPIC is typically complete to Kp~17 (Kp~19 for campaigns covered by Sloan Digital Sky Survey). We furthermore classify 138600 targets in Campaigns 1-8 (~88% of the full target sample) using colors, proper motions, spectroscopy, parallaxes, and galactic population synthesis models, with typical uncertainties for G-type stars of ~3% in Teff, ~0.3dex in logg~40% in radius, ~10% in mass, and ~40% in distance. Our results show that stars targeted by K2 are dominated by K-M dwarfs (~41% of all selected targets), F-G dwarfs (~36%), and K giants (~21%), consistent with key K2 science programs to search for transiting exoplanets and galactic archeology studies using oscillating red giants. However, we find significant variation of the fraction of cool dwarfs with galactic latitude, indicating a target selection bias due to interstellar reddening and increased contamination by giant stars near the galactic plane. We discuss possible systematic errors in the derived stellar properties, and differences with published classifications for K2 exoplanet host stars.2016ApJS..224....2Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/224/2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)V/146 : LAMOST DR1 catalogs (Luo+, 2015)III/272 : RAVE 4th data release (Kordopatis+, 2013)I/322 : UCAC4 Catalogue (Zacharias+, 2012)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)I/297 : NOMAD Catalog (Zacharias+ 2005)I/259 : The Tycho-2 Catalogue (Hog+ 2000)J/MNRAS/456/2260 : K2 Variability Catalogue II (Armstrong+, 2016)J/ApJS/222/14 : Planetary cand. from 1st yr K2 mission (Vanderburg+, 2016)J/MNRAS/452/4283 : 33 RR Lyrae observed in Pisces with K2-E2 (Molnar+, 2015)J/MNRAS/452/3561 : Kepler eclipsing binary stars. K2 C0 (LaCourse+, 2015)J/A+A/579/A19 : K2 Variable Catalogue (Armstrong+, 2015)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/ApJS/215/19 : APOKASC catalog of Kepler red giants (Pinsonneault+, 2014)J/ApJ/787/110 : SAGA: Stromgren data of seismic KIC stars (Casagrande+, 2014)J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)J/ApJ/767/127 : Asteroseismic solutions for 77 Kepler stars (Huber+, 2013)J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)J/ApJ/728/48 : Multicolor eclipse data for 6 new binaries (Kraus+, 2011)J/MNRAS/384/1178 : 2MASS, SDSS and BVRI photometry for 825 stars (Bilir+, 2008)J/AN/326/321 : Absolute magnitudes for late-type dwarfs (Bilir+, 2005)J/A+AS/141/371 : Low-mass stars evolutionary tracks+isochrones (Girardi+, 2000)http://archive.stsci.edu/k2/catalogs.html : K2 catalogs on MASThttp://keplerscience.arc.nasa.gov/ : Kepler & K2 Science Centerhttp://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/224/2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/224/2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/224/2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/224/2https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/224/2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/224/2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/224/2/table5 (Stellar properties of K2 targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/224/2/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/224/2/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/224/2/table5?GETtext/xml+votable180.050000true176.828097-6.0037050.0055555555555555563/73 4/17 19 22 25 28 29 267 289 1126 1127 1133 1144 1146 1152 1154 1160 1161 1164 1603 1606 1609 1612 1686 1687 1692 1693 1730 1809 1812 1813 1814 1834 1920 2684 2686 2687 2772 2773 3003 5/67 73 75 80 82 84 85 92 94 95 97 120 264 266 1063 1067 1074 1075 1078 1082 1083 1086 1130 1155 1164 1165 1167 1200 1204 1216 1218 1224 4499 4502 4503 4528 4529 4531 4537 4540 4541 4543 4546 4556 4582 4583 4588 4590 4612 4613 4614 4620 4622 4623 4624 4627 4634 4652 4653 4654 4660 4662 4664 4665 5870 5871 5882 5883 6394 6395 6396 6398 6401 6402 6403 6404 6406 6407 6409 6411 6418 6419 6422 6423 6428 6430 6431 6433 6452 6453 6454 6725 6726 6727 6733 6735 6736 6738 6739 6742 6743 6757 6780 6914 6915 6926 6944 6945 6946 6952 7233 7235 7244 7245 7246 7260 7261 7262 7424 10715 10727 10733 10735 10741 11076 11077 11079 11096 11097 11100 11101 11180 11182 11192 11194 12006 12007 12016 12017 12018 12022 12023 12024 12026 12027 12030 12125 12127 6/260 261 263 265 266 267 289 291 297 334 335 344 346 347 373 374 375 397 399 437 439 484 485 486 496 497 1160 4245 4246 4247 4250 4251 4262 4263 4265 4290 4293 4295 4306 4320 4322 4325 4327 4336 4338 4339 4349 4350 4351 4514 4515 4524 4526 4613 4615 4645 4664 4665 4756 4757 4759 4804 4805 4820 4876 4878 4900 4904 17071 17082 17083 17086 17087 17130 17973 17975 17981 17987 17990 17991 18002 18003 18006 18007 18120 18121 18123 18145 18147 18168 18169 18171 18177 18178 18179 18180 18182 18188 18190 18191 18202 18203 18206 18208 18210 18213 18216 18218 18219 18222 18223 18228 18230 18232 18233 18234 18236 18320 18322 18326 18327 18356 18357 18366 18376 18378 18400 18460 18461 18462 18484 18486 18487 18504 18520 18522 18530 18531 18532 18533 18534 18540 18542 18544 18592 18593 18596 18597 18599 18605 18607 18620 18621 18646 18652 18664 18665 18668 18669 18674 18680 19537 19540 19541 19712 19713 19716 19717 19728 23470 23471 23479 23522 23523 23524 23526 23545 23546 23547 23548 23550 24927 25533 25534 25535 25570 25571 25590 25596 25597 25598 25601 25602 25603 25622 25632 25633 25635 25641 25642 25643 25665 25666 25667 25670 25671 25681 25682 25683 25684 25686 25687 25716 25718 25719 25728 25729 25741 25780 25781 25783 25820 25824 25826 25828 25829 25831 25840 25842 25864 25890 25896 25898 26899 26928 26929 26931 26939 26948 26950 26961 26963 26964 26966 27025 27037 27108 27109 27111 27124 27125 27128 27651 27652 27654 27655 27672 27674 27698 27788 27789 27790 27792 27794 27812 28929 28931 28965 28967 28988 28989 29052 29053 29120 29121 29124 29224 29226 29312 29313 29314 29326 29327 29338 29360 29362 29363 29368 29700 29702 29704 29706 29728 29730 30736 30738 30744 30752 30753 30754 42859 42872 42874 42877 42878 42879 42902 42903 42905 42906 42907 42928 42929 42931 42937 42938 42939 42960 42961 42970 42971 42973 42974 42975 44313 44341 44393 44396 44409 44412 44413 44414 44711 44717 44718 44719 44726 44727 44732 44733 44734 44774 44780 44781 44782 47982 48014 48015 48022 48023 48036 48037 48039 48043 48045 48046 48047 48076 48077 48083 48086 48087 48102 48103 48113 48114 48115 48116 48126 48127 48478 48479 48497 48596 48597 48599 48605 48607 48629 48810 48811https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/224/2?format=asciidefaultJ/ApJS/224/2/table5Stellar properties of K2 targetsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICK2 Identifiermeta.id;meta.mainlongTeff[1708/16022] Inferred Stellar Effective Temperature (1)Kphys.temperature.effectiveintE_Teff[20/5234] Upper uncertainty on Teff (1)Kstat.error;stat.maxinte_TeffLower uncertainty on Teff (1)Kstat.error;phys.temperature.effectiveintlogg[-0.9/5.4] Inferred Log Surface Gravity (1)log(cm.s**-2)phys.gravityfloatE_logg[0.02/5] Upper uncertainty on logg (1)log(cm.s**-2)stat.error;stat.maxfloate_loggLower uncertainty on logg (1)log(cm.s**-2)stat.errorfloat[Fe/H][-3.5/1] Inferred Metallicity relative to the Sun (1)log(Sun)phys.abund.ZfloatE_[Fe/H][0.05/3] Upper uncertainty on Fe/H (1)log(Sun)stat.error;stat.maxfloate_[Fe/H]Lower uncertainty on Fe/H (1)log(Sun)stat.error;phys.abund.FefloatRad[0.08/532] Inferred Stellar Radius (1)solRadphys.size.radiusfloatE_Rad[0.002/300] Upper uncertainty on Rad (1)solRadstat.error;stat.maxfloate_RadLower uncertainty on Rad (1)solRadstat.errorfloatMass[0.07/6.1] Inferred Mass (1)solMassphys.massfloatE_Mass[0.001/2.2] Upper uncertainty on Mass (1)solMassstat.error;stat.maxfloate_MassLower uncertainty on Mass (1)solMassstat.error;phys.massfloatrho[0/102.5] Inferred Density relative to the Sun (1)Sunphys.densitydoubleE_rhoUpper uncertainty on rho (1)Sunstat.error;stat.maxdoublee_rhoLower uncertainty on rho (1)Sunstat.errordoubleDist[2.9/102700] Inferred Distance (1)pcpos.distance;pos.heliocentricdoubleE_Dist[0.08/482600] Upper uncertainty on Dist (1)pcstat.error;stat.maxdoublee_Dist[0.08/482600] Lower uncertainty on Dist (1)pcstat.errordoubleE(B-V)[0/12.8] Inferred E(B-V) reddening (1)magphot.color.excessfloatE_E(B-V)[0/3.7] Upper uncertainty on E(B-V) (1)magstat.error;stat.maxfloate_E(B-V)Lower uncertainty on E(B-V) (1)magstat.errorfloatFlagClassification Flags (2)meta.code.errorcharRAJ2000Right ascension (J2000) from EPIC catalog (3)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) from EPIC catalog (3)degpos.eq.dec;meta.mainindexedA15Display data from the K2 variable catalog (Armstrong+, 2015, J/A+A/579/A19) if anymeta.ref.urlintnullable2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 2"meta.ref.urlchar