Due to the amount of time needed to process the information which TESS only transmits to Earth on a two week interval, the tidal disruption data was not available until March 13, 2019. Fortunately, the ground based telescope network (ASAS-SN) was available to provide follow up observations. After ASASSN-19bt had occurred, TESS’s southern viewing zone remained oriented toward it, continuing to capture data as the tidal disruption event unfolded, enabling researchers to study black holes and their relationship with other celestial objects in a way that was never possible until this year. So thank you, TESS.
Title disruption events are quite rare, occurring once every 10,000 to 100,000 years in galaxies like the Milky Way. To date, astronomers have only observed around 40 tidal disruptions, but never this early before. Discovering remnants of similar happenings will allow astronomers further insight into understanding this unique phenomenon.