# TESS Program G07180 Title: Monitoring Variability In Spectrophotometric Standard Stars PI: Dutkiewicz, Thomas - Space Telescope Science Institute Type: MINI Summary: We propose to monitor the HST/CALSPEC database of photometric standard stars for significant variability using the TESS 2-minute data. This database calibrates astronomical images in the optical and infrared, including those taken by telescopes like Spitzer and the James Webb Space Telescope (JWST). TESS has already identified variability larger than 1% in a subset of these stars. These stars are necessary to accurately calibrate the absolute and relative flux across different instruments and observatories. By monitoring these targets with TESS, we will detect and constrain their variability, empowering observatories like JWST to efficiently choose stars that will produce the best possible spectrophotometric calibrations. # Sector 084 targets observed (2 min: 20, 20 s: 0) 426959594,9.0737,18.3537,15.93,G07180 288144896,355.9596,32.5459,13.05,G07180 314771701,319.7334,54.2128,12.54,G07180;G07092 323139945,321.7416,73.6436,13.05,G07180;G07009 387813185,315.404,68.1633,6.77,G07180;G07037;G07141;G07166 229945862,288.1966,64.1769,9.34,G07180 233075513,271.372,64.4645,12.23,G07180 233095291,273.0399,63.4951,11.6,G07180 383676357,279.3895,62.5269,5.78,G07180;G07036 219089401,268.8176,66.1698,12.46,G07180 219094190,269.3051,67.0612,11.6,G07180 219097989,269.6583,66.7811,12.94,G07180 219114641,272.1448,69.458,11.92,G07180 219897252,263.2193,71.0786,12.46,G07180 219796019,265.1444,65.4541,12.35,G07180 219863212,258.2743,69.5214,13.5,G07180;G07036 198456033,261.52,58.652,6.38,G07180;G07036 219752116,261.2179,60.4308,9.7,G07180 219820925,268.1057,60.3967,6.68,G07180 383623835,270.6279,58.6274,6.76,G07180;G07036 # Sector 085 targets observed (2 min: 18, 20 s: 4) 415880209,28.0124,47.0027,12.63,G07180;G07092;20SECONDTARGET 323139945,321.7416,73.6436,13.05,G07180;G07009;20SECONDTARGET 387813185,315.404,68.1633,6.77,G07180;G07037;G07141;G07166 229945862,288.1966,64.1769,9.34,G07180 233075513,271.372,64.4645,12.23,G07180 383676357,279.3895,62.5269,5.78,G07180;G07036;20SECONDTARGET 219089401,268.8176,66.1698,12.46,G07180 219094190,269.3051,67.0612,11.6,G07180 219097989,269.6583,66.7811,12.94,G07180 219114641,272.1448,69.458,11.92,G07180 219863212,258.2743,69.5214,13.5,G07180;G07036;20SECONDTARGET 219897252,263.2193,71.0786,12.46,G07180 233205654,265.7687,66.9171,13.3,G07180 219796019,265.1444,65.4541,12.35,G07180 198456033,261.52,58.652,6.38,G07180;G07036 219820925,268.1057,60.3967,6.68,G07180 233067231,270.6132,60.7265,12.0,G07180 383623835,270.6279,58.6274,6.76,G07180;G07036 # Sector 086 targets observed (2 min: 20, 20 s: 6) 327587572,76.3777,52.8304,12.17,G07180;20SECONDTARGET 298411553,149.4738,85.4945,16.15,G07180;G07092;20SECONDTARGET 383553764,263.0553,86.5868,4.36,G07180;20SECONDTARGET 323139945,321.7416,73.6436,13.05,G07180;G07009;20SECONDTARGET 387813185,315.404,68.1633,6.77,G07180;G07037;G07141;G07166 229945862,288.1966,64.1769,9.34,G07180 219089401,268.8176,66.1698,12.46,G07180 219094190,269.3051,67.0612,11.6,G07180 219097989,269.6583,66.7811,12.94,G07180 219114641,272.1448,69.458,11.92,G07180 219863212,258.2743,69.5214,13.5,G07180;G07036;20SECONDTARGET 219897252,263.2193,71.0786,12.46,G07180 233205654,265.7687,66.9171,13.3,G07180 198456033,261.52,58.652,6.38,G07180;G07036 207440438,244.9421,55.5716,15.62,G07180 219752116,261.2179,60.4308,9.7,G07180 233067231,270.6132,60.7265,12.0,G07180 233095291,273.0399,63.4951,11.6,G07180 383623835,270.6279,58.6274,6.76,G07180;G07036 383676357,279.3895,62.5269,5.78,G07180;G07036;20SECONDTARGET # Sector 087 targets observed (2 min: 6, 20 s: 3) 440765193,108.6304,13.8602,9.38,G07180 32869782,87.0833,-24.4641,7.27,G07180;20SECONDTARGET 317923609,89.8325,-14.0818,18.88,G07180 100589904,86.4996,-32.3066,5.47,G07180;G07037;20SECONDTARGET 140282069,85.216,-31.3536,7.25,G07180;20SECONDTARGET 267330921,113.3638,-50.5842,6.75,G07180 # Sector 088 targets observed (2 min: 4, 20 s: 1) 802881650,120.0592,-10.7915,17.32,G07180 933650,130.2142,-16.3485,9.19,G07180 267330921,113.3638,-50.5842,6.75,G07180 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET # Sector 089 targets observed (2 min: 2, 20 s: 1) 267330921,113.3638,-50.5842,6.75,G07180 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET # Sector 090 targets observed (2 min: 4, 20 s: 2) 398243520,181.3615,-23.5518,12.61,G07180;20SECONDTARGET 181240911,175.0566,-39.1467,7.28,G07180 23226265,166.9499,-34.3495,13.81,G07180;G07092 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET # Sector 091 targets observed (2 min: 3, 20 s: 2) 294401924,218.5675,-12.5154,8.57,G07180;20SECONDTARGET 54837036,238.5817,-8.5805,8.11,G07180 135656809,243.9069,-8.3729,4.91,G07180;20SECONDTARGET # Sector 092 targets observed (2 min: 1, 20 s: 0) 301173823,349.9933,-5.1656,12.2,G07180;G07167 # Sector 093 targets observed (2 min: 4, 20 s: 2) 148533811,265.7049,-40.3238,8.21,G07180 365653206,274.4353,-61.7098,8.36,G07180 468150691,307.1054,-87.4726,7.48,G07180;20SECONDTARGET 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET # Sector 094 targets observed (2 min: 3, 20 s: 2) 79154271,316.6469,-49.9659,8.39,G07180 468150691,307.1054,-87.4726,7.48,G07180;20SECONDTARGET 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET # Sector 095 targets observed (2 min: 3, 20 s: 2) 441120034,324.7954,-27.3072,6.17,G07180;20SECONDTARGET 79154271,316.6469,-49.9659,8.39,G07180 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET # Sector 096 targets observed (2 min: 5, 20 s: 4) 80313923,7.827,-43.6064,7.37,G07180 166698220,35.7281,-51.0917,5.75,G07180;20SECONDTARGET 200779640,50.5618,-53.755,15.31,G07180;G07020;20SECONDTARGET 207200679,47.4516,-56.3966,14.35,G07180;20SECONDTARGET 41232189,91.5393,-66.0394,5.75,G07180;G07036;20SECONDTARGET