TESS and AGN multi-wavelength variability

In late June 2018, increased hard X-ray emission was detected from NGC 1566. Soon after, UVOT data collected using the Neil Gehrels Swift Observatory showed a significant brightening, in tandem with the ASAS-SN light curve showing dramatic variability. Combining data taken using TESS, Swift, ASAS-SN, and Las Cumbres Observatory, we analyzed 4263 photometric observations spread out over ~100 days following the flare. Swift's X-ray and UV/optical, ASAS-SN's g-band, and TESS's redder filter make an ideal combination for continuum reverberation mapping studies because it provides broad wavelength coverage. These measurements of inter-band correlation and lag are used to ultimately test and constrain continuum-emission disk accretion models. In the era of TESS, our goal is to perform this analysis on a large scale. By discovering and studying variable AGN with TESS in combination with other surveys including ASAS-SN, we will be able to create a robust sample to investigate the cause of variability. This will ultimately shed light on the high-energy environment surrounding black holes.