Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS

  title={Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS},
  author={Thomas W.-S. Holoien and Patrick J. Vallely and Katie Auchettl and Krzysztof Zbigniew Stanek and Christopher S. Kochanek and K. Decker French and Jos{\'e} Luis Prieto and Benjamin. J. Shappee and Jonathan S. Brown and Michael M. Fausnaugh and Subo Dong and Todd A. Thompson and Subhash Bose and Jack M. M. Neustadt and Paulo Cacella and Joseph Brimacombe and Malhar R. Kendurkar and Rachael L. Beaton and Konstantina Boutsia and Laura B. Chomiuk and Thomas Connor and Nidia I. Morrell and Andrew B. Newman and Gwen C. Rudie and Laura Shishkovksy and Jay Strader},
  journal={The Astrophysical Journal},
We present the discovery and early evolution of ASASSN-19bt, a tidal disruption event (TDE) discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d ≃ 115 Mpc and the first TDE to be detected by TESS. As the TDE is located in the TESS Continuous Viewing Zone, our data set includes 30 minute cadence observations starting on 2018 July 25, and we precisely measure that the TDE begins to brighten ∼8.3 days before its discovery. Our data set also includes 18 epochs of… 

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