# TESS Program G05101 Title: Searching For Variability In Spectrophotometric Standard Stars PI: Mullally, Susan - Space Telescope Science Institute Type: MINI Summary: We propose to monitor well known photometric standard stars from the HST/CALSPEC database to identify significant variability from pulsations, spots and flares using the TESS 2-minute data. This database is used to calibrate astronomical images in the optical and infrared, including telescopes like Spitzer and the James Webb Space Telescope (JWST). These stars are necessary to accurately calibrate the absolute and relative flux across different instruments and observatories, a requirement for precise astronomical measurements. TESS has already shown its value in identifying variability larger than 1 percent in a subset of these stars. Here we request to search for variability on stars yet to be observed by TESS and monitor the rest for unexpected variability. # Sector 056 targets observed (2 min: 7, 20 s: 2) 258822592,332.8841,18.0932,8.96,G05101 420814525,330.7951,18.8842,7.13,G05101;G05015;G05144;G05069;20SECONDTARGET 452740376,327.7957,28.8636,10.87,G05101;G05057;20SECONDTARGET 383623835,270.6279,58.6274,6.76,G05101 219089401,268.8176,66.1698,12.46,G05101 219097989,269.6583,66.7811,12.94,G05101 207440438,244.9421,55.5716,15.62,G05101 # Sector 057 targets observed (2 min: 6, 20 s: 2) 426959594,9.0732,18.3537,15.93,G05103;G05101;20SECONDTARGET 288144896,355.9597,32.5459,13.05,G05084;G05101;G05115;G05081;G05109;20SECONDTARGET 219089401,268.8176,66.1698,12.46,G05101 219097989,269.6583,66.7811,12.94,G05101 219796019,265.1444,65.4541,12.35,G05101 383623835,270.6279,58.6274,6.76,G05101 # Sector 058 targets observed (2 min: 4, 20 s: 0) 219089401,268.8176,66.1698,12.46,G05101 219097989,269.6583,66.7811,12.94,G05101 219796019,265.1444,65.4541,12.35,G05101 383623835,270.6279,58.6274,6.76,G05101 # Sector 059 targets observed (2 min: 4, 20 s: 1) 298411553,149.4739,85.4945,16.15,G05101;G05084;G05115;G05081;20SECONDTARGET 219089401,268.8176,66.1698,12.46,G05101 219097989,269.6583,66.7811,12.94,G05101 383623835,270.6279,58.6274,6.76,G05101 # Sector 060 targets observed (2 min: 6, 20 s: 1) 81103318,124.8437,54.082,9.2,G05101 298411553,149.4739,85.4945,16.15,G05101;G05084;G05115;G05081;20SECONDTARGET 219089401,268.8176,66.1698,12.46,G05101 219097989,269.6583,66.7811,12.94,G05101 219796019,265.1444,65.4541,12.35,G05101 383623835,270.6279,58.6274,6.76,G05101 # Sector 061 targets observed (2 min: 3, 20 s: 0) 802881650,120.0592,-10.7915,17.32,G05101 933650,130.214,-16.3482,9.19,G05101 267330921,113.3638,-50.5842,6.75,G05101 # Sector 062 targets observed (2 min: 1, 20 s: 0) 267330921,113.3638,-50.5842,6.75,G05101 # Sector 064 targets observed (2 min: 1, 20 s: 0) 5914520,193.3148,-18.5274,7.81,G05101 # Sector 066 targets observed (2 min: 2, 20 s: 1) 148533811,265.705,-40.3235,8.21,G05101 468150691,307.1032,-87.4726,7.48,G05101;G05155;20SECONDTARGET # Sector 067 targets observed (2 min: 2, 20 s: 1) 79154271,316.6468,-49.9658,8.39,G05101 468150691,307.1033,-87.4726,7.48,G05101;G05155;20SECONDTARGET # Sector 069 targets observed (2 min: 2, 20 s: 2) 200779640,50.5618,-53.755,15.31,G05101;G05084;G05115;G05081;20SECONDTARGET 207200679,47.4514,-56.3966,14.35,G05101;G05084;G05115;G05081;20SECONDTARGET