# TESS Program G022219

Title: A Search For Flickering To Probe Accretion Activity And Binarity In Agb Stars (Cycle 2)

PI: Sahai, Raghvendra - NASA/Jpl

Type: SMALL

Summary: Our X-ray surveys of a small sample of cool AGB stars with FUV excesses reveal X-ray emission in 40% of our sample. The X-ray emission shows the unexpected presence of magnetically-confined and very hot gas (Tx~35-150 MK), and quasi-periodic variations on hour-long timescales, likely associated with an accretion disk around a main-sequence companion. HST UV observations show flickering on ~minute time-scales for our key fuvAGB object, confirming the presence of an accretion disk. We propose continuation of our successful cycle 1 TESS survey to search for flickering in TESS's optical band for a statistical sample of AGB stars with UV emission. The resulting database of high-cadence, high-sensitivity light curves will provide an unprecedented window into binary interactions in AGB stars.


# Sector 014 targets observed (5)
219878176,260.8145,71.87,4.12,G022219
259272661,293.8508,69.8056,4.06,G022219
233185267,224.3948,65.9326,2.07,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
310965252,161.1597,68.7756,4.88,G022219
149928206,161.9028,65.6164,4.63,G022219

# Sector 015 targets observed (7)
126452270,315.8741,23.9962,3.46,G022219
236217289,313.7405,33.764,4.74,G022219
259272661,293.8508,69.8056,4.06,G022219
349977461,305.0253,68.8805,2.97,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
219878176,260.8145,71.87,4.12,G022219
207435026,244.314,59.7552,2.99,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
233185267,224.3948,65.9326,2.07,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25

# Sector 016 targets observed (9)
164178379,335.985,31.2618,4.21,G022219
259272661,293.8508,69.8056,4.06,G022219
349977461,305.0253,68.8805,2.97,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
219878176,260.8145,71.87,4.12,G022219
233185267,224.3948,65.9326,2.07,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
207435026,244.314,59.7552,2.99,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
441706783,215.7206,53.8103,7.52,G022219
165370745,200.7728,47.0021,4.06,G022219
393960365,211.9824,43.8543,2.65,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25

# Sector 017 targets observed (10)
61336064,23.4768,35.6082,4.76,G022219
267942318,11.8289,32.6856,6.79,G022219
440659103,7.0057,27.0974,6.54,G022219
13961601,13.8113,24.557,3.86,G022219
333130507,11.6371,15.4752,3.08,G022133;G022219;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25
127420450,5.7391,38.7543,4.57,G022219
354534670,1.7924,34.8538,5.97,G022219
455767350,358.0314,37.8502,5.95,G022219
259272661,293.8508,69.8056,4.06,G022219
422989548,263.4909,53.9604,7.69,G022219