# Summary of K2 Program GO5081

Title: Searching for Terrestrial Planets Orbiting Cool Stars and Brown Dwarfs with K2

PI: Demory, Brice-Olivier (University of Cambridge)
CoIs: Laughlin, Gregory P.; Lissauer, Jack J.; Dragomir, Diana; Zsom, Andras; Selsis, Franck; Stamenkovic, Vlada; Gillon, Michael; Payne, Matthew J; Huber, Daniel; de Wit, Julien

We propose to use K2 to conduct a detailed search for Earth-sized planets orbiting the brightest cool stars and brown dwarfs (spectral types from M0 to L8). We have identified 243 suitable targets for campaigns 4 and 5. This population of objects presents several advantages for exoplanet surveys. First, cool stars and brown dwarfs are small and thus result in favorable planet-to-star area ratios. Second, because of their low effective temperature, the inner edge of their habitable zone can be extremely close (down to a few days only). Third, our targets are bright at infrared wavelengths, which will enable detailed follow-up studies. Our program therefore represents a unique opportunity to find a transiting Earth-size exoplanet for which atmospheric features (including biosignatures) could be detected with near-to-come facilities such as JWST. Such an exoplanet has not been discovered yet. As of today, K2 is the only facility that provides the required stability and photometric precision to make this survey successful. This proposal is a continuation of our K2 campaigns 0, 1, 2 and 3 observations.

# Targets requested by this program that have been observed (110)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
211301854, 133.908685, 9.882912, 17.857, GO5081_LC
211303324, 132.523605, 9.914832, 17.969, GO5081_LC
211311813, 132.769804, 10.089181, 17.351, GO5081_LC
211321707, 133.87445, 10.287085, 17.51, GO5081_LC
211321992, 134.135902, 10.293075, 18.188, GO5081_LC
211328277, 130.888478, 10.413071, 17.798, GO5036_SC|GO5081_LC|GO5030_LC|GO5036_LC
211331473, 132.835007, 10.473391, 9.286, GO5020_LC|GO5081_LC
211332457, 128.848607, 10.492178, 14.465, GO5036_SC|GO5036_LC|GO5081_LC
211357895, 132.649725, 10.954338, 18.0, GO5023_LC|GO5036_LC|GO5081_LC|GO5030_LC
211364964, 133.867884, 11.075428, 12.007, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5081_LC|GO5106_LC|GO5060_LC|GO5109_LC
211385897, 127.267145, 11.418134, 11.67, GO5006_LC|GO5007_LC|GO5020_LC|GO5029_LC|GO5081_LC|GO5104_LC|GO5106_LC|GO5060_LC|GO5011_LC|GO5109_LC
211427097, 133.042468, 12.048243, 11.725, GO5006_LC|GO5007_LC|GO5020_LC|GO5033_LC|GO5048_LC|GO5081_LC|GO5106_LC|GO5060_LC|GO5109_LC
211480655, 136.55852, 12.859502, 12.214, GO5002_SC|GO5002_LC|GO5006_LC|GO5020_LC|GO5029_LC|GO5081_LC|GO5097_LC
211481688, 136.910721, 12.874814, 11.806, GO5020_LC|GO5029_LC|GO5081_LC|GO5104_LC|GO5106_LC|GO5060_LC|GO5109_LC
211498244, 123.62329, 13.114926, 11.882, GO5020_LC|GO5029_LC|GO5081_LC|GO5104_LC|GO5106_LC|GO5060_LC
211599658, 126.490026, 14.534761, 12.022, GO5020_LC|GO5029_LC|GO5081_LC|GO5106_LC|GO5060_LC|GO5011_LC|GO5109_LC
211602578, 130.150541, 14.573549, 17.739, GO5081_LC|GO5038_LC|GO5030_LC
211613507, 125.382219, 14.723092, 18.389, GO5057_LC|GO5081_LC|GO5030_LC
211628806, 127.277674, 14.939601, 16.15, GO5036_SC|GO5036_LC|GO5081_LC|GO5030_LC
211642294, 129.28317, 15.129313, 10.787, GO5002_SC|GO5102_SC|GO5098_SC|GO5002_LC|GO5020_LC|GO5029_LC|GO5071_LC|GO5081_LC|GO5104_LC|GO5060_LC|GO5102_LC|GO5011_LC|GO5109_LC|GO5072_LC|GO5098_LC
211680042, 127.842566, 15.647536, 17.266, GO5036_LC|GO5081_LC|GO5030_LC
211727819, 129.38677, 16.293901, 18.144, GO5036_LC|GO5081_LC|GO5030_LC
211788733, 125.270747, 17.155417, 11.952, GO5020_LC|GO5023_LC|GO5081_LC|GO5083_LC|GO5109_LC|GO5006_LC|GO5011_LC
211845940, 130.794473, 17.962279, 11.872, GO5006_LC|GO5020_LC|GO5029_LC|GO5081_LC|GO5104_LC|GO5022_LC|GO5060_LC|GO5011_LC|GO5109_LC
211884659, 123.79803, 18.503218, 18.586, GO5081_LC
211889233, 130.933359, 18.568668, 11.585, GO5006_LC|GO5020_LC|GO5029_LC|GO5081_LC|GO5104_LC|GO5106_LC|GO5060_LC|GO5109_LC
211891128, 129.218309, 18.595991, 18.046, GO5036_LC|GO5081_LC|GO5030_LC
211892034, 136.429034, 18.609377, 11.583, GO5002_SC|GO5002_LC|GO5006_LC|GO5020_LC|GO5029_LC|GO5081_LC|GO5104_LC|GO5060_LC|GO5109_LC
211893584, 123.475255, 18.632198, 17.84, GO5081_LC
211896791, 123.365196, 18.680014, 18.043, GO5081_LC
211910449, 123.784627, 18.882805, 18.204, GO5081_LC
211942125, 125.317842, 19.356836, 18.042, GO5081_LC
211944676, 127.906656, 19.394321, 9.904, GO5023_LC|GO5071_LC|GO5081_LC|GO5098_LC
211944856, 127.905928, 19.397023, 11.018, GO5081_LC|GO5097_LC|GO5064_LC|GO5109_LC
211945363, 134.314257, 19.404908, 12.349, GO5002_SC|GO5039_SC|GO5020_LC|GO5029_LC|GO5081_LC|GO5097_LC|GO5011_LC|GO5109_LC|GO5002_LC|GO5039_LC
211953626, 124.415658, 19.527273, 18.123, GO5081_LC
211962038, 126.677623, 19.656242, 17.713, GO5036_SC|GO5036_LC|GO5081_LC
211963497, 137.450931, 19.678574, 16.132, GO5036_SC|GO5039_SC|GO5036_LC|GO5081_LC|GO5030_LC|GO5039_LC
211970944, 124.469425, 19.791103, 17.037, GO5036_LC|GO5081_LC
211974835, 126.552608, 19.852228, 17.606, GO5081_LC
211978086, 126.345901, 19.902601, 17.311, GO5081_LC
211978512, 136.379267, 19.909292, 17.434, GO5036_LC|GO5081_LC|GO5030_LC
211981633, 129.499046, 19.95775, 17.889, GO5036_LC|GO5081_LC|GO5030_LC
211981759, 126.128452, 19.959557, 17.74, GO5081_LC
211992989, 127.052651, 20.139147, 12.796, GO5007_LC|GO5029_LC|GO5081_LC|GO5060_LC|GO5011_LC
211994941, 128.184433, 20.171436, 17.8, GO5048_LC|GO5081_LC
212002661, 127.225454, 20.298323, 18.013, GO5095_LC|GO5081_LC
212003005, 126.411029, 20.304609, 18.463, GO5081_LC
212006725, 126.342652, 20.365768, 17.683, GO5004_LC|GO5018_LC|GO5024_LC|GO5026_LC|GO5037_LC|GO5048_LC|GO5081_LC
212010183, 124.189874, 20.423515, 17.562, GO5081_LC
212013823, 124.498726, 20.483442, 18.294, GO5081_LC
212017195, 124.187744, 20.540335, 18.288, GO5081_LC
212017281, 128.008202, 20.541706, 18.164, GO5081_LC
212019105, 126.540474, 20.570967, 16.892, GO5011_LC|GO5081_LC
212020021, 124.442435, 20.58647, 16.987, GO5081_LC
212021699, 127.868424, 20.615244, 17.885, GO5081_LC
212022056, 126.938609, 20.621183, 17.426, GO5081_LC
212022763, 126.620861, 20.632746, 18.203, GO5081_LC
212026054, 123.310975, 20.687262, 18.576, GO5081_LC
212027121, 127.989263, 20.705931, 17.847, GO5048_LC|GO5081_LC
212028281, 126.006046, 20.725574, 17.897, GO5081_LC
212028433, 127.31235, 20.728119, 18.205, GO5036_LC|GO5048_LC|GO5081_LC
212035340, 129.326365, 20.843037, 17.382, GO5048_LC|GO5081_LC
212067906, 126.857699, 21.417727, 18.815, GO5081_LC
212071306, 130.465737, 21.479488, 17.889, GO5081_LC
212072251, 129.059888, 21.497, 17.879, GO5081_LC
212072712, 127.007957, 21.505678, 17.897, GO5081_LC
212078008, 129.568228, 21.603113, 18.241, GO5081_LC
212078701, 129.693435, 21.616129, 18.567, GO5081_LC
212080305, 129.436322, 21.646883, 17.047, GO5081_LC
212085465, 131.140908, 21.742311, 17.883, GO5081_LC
212090825, 130.038603, 21.844261, 17.04, GO5081_LC
212091105, 130.574835, 21.849335, 17.974, GO5081_LC
212102189, 127.613506, 22.062668, 17.133, GO5036_LC|GO5081_LC
212106472, 130.520343, 22.148357, 17.876, GO5081_LC
212108940, 129.625534, 22.19718, 18.304, GO5081_LC
212109980, 130.974347, 22.218493, 17.625, GO5081_LC
212110421, 132.337908, 22.227102, 17.614, GO5081_LC
212111554, 134.522912, 22.249502, 16.67, GO5036_LC|GO5081_LC|GO5030_LC
212113915, 129.05838, 22.296368, 18.861, GO5081_LC
212123277, 130.244883, 22.480555, 17.73, GO5018_LC|GO5024_LC|GO5026_LC|GO5048_LC|GO5095_LC|GO5081_LC
212127137, 133.496552, 22.560087, 17.818, GO5036_LC|GO5081_LC|GO5030_LC
212128548, 134.199742, 22.58839, 17.151, GO5023_LC|GO5036_LC|GO5057_LC|GO5081_LC|GO5030_LC
212130380, 131.363839, 22.625975, 16.448, GO5081_LC
212130922, 127.505853, 22.636833, 18.613, GO5081_LC
212135209, 130.466064, 22.722221, 18.197, GO5081_LC
212136180, 132.063242, 22.742304, 17.338, GO5081_LC
212136544, 127.858677, 22.749638, 16.323, GO5036_LC|GO5081_LC
212140336, 128.462666, 22.82778, 18.301, GO5081_LC
212141692, 134.019761, 22.856598, 17.915, GO5081_LC
212143886, 131.166455, 22.902657, 18.023, GO5081_LC
212144120, 129.335017, 22.907787, 18.515, GO5011_LC|GO5081_LC
212148445, 128.449792, 22.999876, 17.874, GO5081_LC
212150766, 133.846421, 23.048481, 16.767, GO5081_LC
212153751, 127.497842, 23.11516, 17.196, GO5081_LC
212155930, 132.643829, 23.163855, 17.985, GO5081_LC
212156288, 134.43698, 23.171358, 17.758, GO5081_LC
212158934, 130.157506, 23.230766, 17.689, GO5081_LC
212162176, 133.609702, 23.30221, 18.96, GO5081_LC
212162270, 129.80406, 23.304527, 17.522, GO5081_LC
212162487, 129.868619, 23.310183, 18.09, GO5081_LC
212162615, 130.428703, 23.312993, 12.605, GO5020_LC|GO5029_LC|GO5081_LC|GO5097_LC|GO5106_LC|GO5060_LC|GO5011_LC|GO5109_LC
212165192, 128.252171, 23.374603, 18.842, GO5081_LC
212170651, 129.774803, 23.502945, 18.857, GO5081_LC
212170953, 126.696846, 23.510202, 18.748, GO5081_LC
212171836, 132.524948, 23.531386, 11.65, GO5020_LC|GO5081_LC|GO5011_LC|GO5109_LC|GO5006_LC
212176032, 127.26254, 23.634304, 18.012, GO5081_LC
212177548, 128.47372, 23.67293, 18.755, GO5081_LC
212177709, 128.243072, 23.677305, 18.733, GO5081_LC
212178513, 127.899756, 23.697451, 18.19, GO5036_SC|GO5036_LC|GO5011_LC|GO5081_LC