Abstract for Proposal 086085

A YSE view of extreme variable accretion onto supermassive black holes

Capturing a SMBH within the first few days of it undergoing extreme variable accretion can provide us with novel probes into both the physics and nature of the black holes and the physics of the accretion that they undergo. With transient surveys now detecting several transients a year within hours of their initial outburst, it is time to begin focusing on the earliest epoch of their evolution across multiple wavelengths. Here we propose to take advantage of XMM's large collective area and high spatial and spectral resolution to probe the nature of the X-ray emission from a supermassive black hole undergoing extreme variable accretion that was discovered in our optical survey, the Young Supernova Experiment which focuses on detecting some of the youngest transients in the nearby universe.

Details on Observing Strategy and Trigger Criteria
Here we require the YSE transient to have an absorbed flux of F_X (0.3-10.0) > 2E-13 erg cm^-2 s^-1 and has independent classification as a changing look AGN or a TDE that exhibits X-rays.