# TESS Program G022176

Title: Photometric Variability Among Helium-Rich White Dwarf Stars As An Indicator For The Presence Of Magnetic Fields

PI: Holberg, Jay - University Of Arizona

Type: SMALL

Summary: We propose TESS observations of a sample of cool helium-rich white dwarf stars to search for rotational photometric modulations associated with the presence of magnetic spots. Examples of this are seen in hydrogen-rich white dwarfs. Finding clear examples of this in cool He-rich white dwarfs would help to clarify the true frequency of magnetism in white dwarfs and help explain the distinct deficit of binary systems among white dwarfs, by strengthening the link between white dwarf magnetism and common envelope mergers.


# Sector 014 targets observed (4)
394178499,289.7445,38.7213,14.14,G022077;G022028;G022176;G022017
233212451,267.0123,70.8827,13.27,G022077;G022028;G022176;G022017
202420264,225.2095,64.2775,16.15,G022077;G022028;G022176
138589319,176.4333,63.0979,15.72,G022077;G022028;G022176

# Sector 015 targets observed (6)
136513972,317.4646,42.9513,15.65,G022077;G022028;G022176
428831740,315.4353,31.8092,14.99,G022077;G022028;G022176
233212451,267.0122,70.8827,13.27,G022077;G022028;G022176;G022017
165735741,231.4282,56.4849,16.28,G022077;G022176
202420264,225.2095,64.2775,16.15,G022077;G022028;G022176
138589319,176.4332,63.0979,15.72,G022077;G022028;G022176

# Sector 016 targets observed (7)
136513972,317.4646,42.9513,15.65,G022077;G022028;G022176
119996731,334.504,39.1444,16.09,G022077;G022028;G022176;G022065
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0121,70.8827,13.27,G022077;G022028;G022176;G022017
202420264,225.2095,64.2775,16.15,G022077;G022028;G022176
199574211,248.5786,57.1757,14.5,G022077;G022028;G022176
165735741,231.4282,56.4849,16.28,G022077;G022176

# Sector 017 targets observed (7)
22499336,2.3955,31.1436,16.59,G022077;G022176
58843181,19.5002,16.1688,13.75,G022077;G022028;G022176;G022017
312150095,10.3438,55.8349,12.75,G022028;G022176
291688847,358.736,40.4553,14.73,G022077;G022028;G022176
428986688,345.6621,76.5013,16.29,G022028;G022176
233212451,267.012,70.8828,13.27,G022077;G022028;G022176;G022017
1271325892,250.0955,73.1774,18.89,G022176

# Sector 018 targets observed (4)
312150095,10.3438,55.8349,12.75,G022028;G022176
275139100,10.4545,73.3555,16.12,G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0119,70.8828,13.27,G022077;G022028;G022176;G022017

# Sector 019 targets observed (7)
470429964,65.7857,50.1039,16.13,G022028;G022176
669319381,67.8133,58.9698,12.12,G022176
275139100,10.4545,73.3555,16.12,G022028;G022176
428986688,345.6621,76.5013,16.29,G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0118,70.8828,13.27,G022077;G022028;G022176;G022017
199574211,248.5784,57.1758,14.5,G022077;G022028;G022176

# Sector 020 targets observed (6)
156939760,109.507,45.7971,15.17,G022077;G022028;G022176
321104192,107.5588,37.67,17.28,G022028;G022176
741946199,103.0556,36.7616,16.93,G022077;G022176
284021737,118.3628,52.4907,15.35,G022077;G022028;G022176
53426287,119.0045,57.6975,15.01,G022077;G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176

# Sector 021 targets observed (8)
166532159,134.8091,32.9534,15.07,G022077;G022028;G022176
138589319,176.4332,63.0978,15.72,G022077;G022028;G022176
251080865,138.9735,53.417,13.58,G022077;G022028;G022176;G022017
453433386,147.569,53.2539,15.02,G022077;G022028;G022176
8292387,163.0475,40.8335,16.37,G022077;G022176
202420264,225.2095,64.2775,16.15,G022077;G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0117,70.8828,13.27,G022077;G022028;G022176;G022017

# Sector 022 targets observed (8)
165718070,164.2914,30.2267,14.58,G022176
3896252,171.3376,21.1858,16.55,G022077;G022176
202362742,179.1807,18.3721,15.37,G022028;G022176;G022065
165735741,231.4282,56.4849,16.28,G022077;G022176
202420264,225.2095,64.2775,16.15,G022077;G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0116,70.8829,13.27,G022077;G022028;G022176;G022017
199574211,248.5783,57.1758,14.5,G022077;G022028;G022176

# Sector 023 targets observed (6)
376917238,205.3384,5.0128,15.6,G022077;G022028;G022176
359161445,196.0084,28.5279,16.0,G022176
199574211,248.5783,57.1759,14.5,G022077;G022028;G022176
165735741,231.4282,56.4849,16.28,G022077;G022176
202420264,225.2095,64.2775,16.15,G022077;G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176

# Sector 024 targets observed (6)
199574211,248.5782,57.1759,14.5,G022077;G022028;G022176
165735741,231.4282,56.4849,16.28,G022077;G022176
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0115,70.8829,13.27,G022077;G022028;G022176;G022017
275139100,10.4546,73.3555,16.12,G022028;G022176
428986688,345.6621,76.5013,16.29,G022028;G022176

# Sector 025 targets observed (6)
345813041,258.6267,21.4512,16.36,G022176;G022077
199574211,248.5782,57.1759,14.5,G022077;G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176
233212451,267.0114,70.8829,13.27,G022077;G022028;G022176;G022017
275139100,10.4546,73.3555,16.12,G022028;G022176
428986688,345.6622,76.5013,16.29,G022028;G022176

# Sector 026 targets observed (5)
199574211,248.5781,57.176,14.5,G022077;G022028;G022176
233212451,267.0113,70.883,13.27,G022077;G022028;G022176;G022017
345813041,258.6267,21.4512,16.36,G022176;G022077
470998232,278.4933,19.7625,16.16,G022077;G022028;G022176
1271325892,250.0955,73.1774,18.89,G022176