The Discovery of the First "Changing Look" Quasar: New Insights into the Physics & Phenomenology of AGN

Stephanie M. LaMassa, Sabrina Cales, Edward C. Moran +6

SDSS J015957.64+003310.5 is an X-ray selected, $z=0.31$ AGN from the Stripe 82X survey that transitioned from a Type 1 quasar to a Type 1.9 AGN between 2000 and 2010. This is the m…