# Summary of K2 Program GO4001

Title: A Search for Habitable Planets Around White Dwarfs in Fields 4 and 5

PI: Kilic, Mukremin (University of Oklahoma)
CoIs: Mazeh, Tsevi Moshe; Loeb, Abraham; Mullally, Fergal; Maoz, Dan; Debes, John Henry; Brown, Warren R; Agol, Eric

A large fraction of white dwarfs (WDs) may hot planets in their habitable zones. These planets may provide our best chance to detect bio-markers on a transiting exoplanet, thanks to the diminished contrast ratio between the Earth-sized WD and its Earth-sized planets. The James Webb Space Telescope is capable of obtaining the first spectroscopic measurements of such planets, yet there are no known planets around WDs. Here we propose to take advantage of the unique capability of the K2 mission to perform a transit survey that is capable of detecting the first planet in the habitable zone of a white dwarf. There are nearly 400 WDs known in Fields 4 and 5. Thanks to the large field of view of Kepler, for the first time in history, a large number of WDs can be observed at the same time, which is essential for discovering transits. This survey will maintain Kepler's spirit of searching for habitable Earths, but near new hosts.

# Targets requested by this program that have been observed (28)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
210315527, 58.349502, 11.200202, 18.838, GO4041_LC|GO4017_LC|GO4001_LC
210346126, 59.820121, 12.112158, 16.915, GO4001_LC
210355209, 59.578643, 12.364351, 17.208, GO4001_LC
210372930, 59.724929, 12.822374, 18.734, GO4001_LC
210377280, 61.103849, 12.928716, 18.518, GO4001_LC
210398578, 59.225646, 13.433897, 18.367, GO4073_SC|GO4001_LC|GO4073_LC
210403895, 57.164901, 13.558093, 18.056, GO4041_LC|GO4017_LC|GO4001_LC|GO4003_LC
210471507, 62.244192, 14.918842, 19.93, GO4001_LC
210480719, 56.728601, 15.081714, 18.679, GO4073_SC|GO4001_LC|GO4073_LC
210484300, 64.559712, 15.143604, 18.983, GO4017_SC|GO4041_LC|GO4017_LC|GO4001_LC
210507741, 63.828671, 15.542097, 19.546, GO4001_LC
210520485, 58.185501, 15.749874, 18.709, GO4073_SC|GO4001_LC|GO4073_LC
210571155, 58.773131, 16.539352, 18.307, GO4073_SC|GO4001_LC|GO4073_LC
210605073, 65.62329, 17.037875, 17.887, GO4001_LC
210609259, 56.129281, 17.095534, 17.658, GO4073_SC|GO4001_LC|GO4073_LC
210619926, 57.604035, 17.246507, 9.233, GO4043_SC|GO4027_SC|GO4020_LC|GO4018_LC|GO4057_LC|GO4043_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4001_LC|GO4033_LC|GO4007_LC|GO4072_LC|GO4104_LC|GO4027_LC|GO4024_LC
210659779, 56.320172, 17.802151, 16.521, GO4043_SC|GO4057_LC|GO4043_LC|GO4001_LC|GO4073_LC
210705160, 66.474818, 18.436329, 18.712, GO4001_LC
210705164, 56.145114, 18.436405, 15.731, GO4073_SC|GO4098_SC|GO4041_LC|GO4001_LC|GO4073_LC|GO4098_LC
210802569, 62.572794, 19.906956, 17.462, GO4041_LC|GO4001_LC
220115909, , , , GO4073_SC|GO4001_LC|GO4073_LC
220115918, , , , GO4073_SC|GO4001_LC|GO4073_LC
220115932, , , , GO4001_LC
220115933, , , , GO4073_SC|GO4041_LC|GO4017_LC|GO4001_LC|GO4073_LC
220115937, , , , GO4001_LC
220115941, , , , GO4001_LC
220115944, , , , GO4041_LC|GO4001_LC
220115963, , , , GO4001_LC