Lecturer: Dr. Giorgos Leloudas Affiliation: Weizmann Institute of Science Abstract: ASASSN-15lh was proposed to be the most luminous supernova ever discovered. Based on new evidence we suggest that this event is not a superluminous supernova but a tidal disruption event around a supermassive black hole. Arguments in favor of this interpretation include: the light curve and temperature evolution, the spectroscopic properties of the event and the surrounding medium and its location being consistent with the nucleus of a passive and massive galaxy. Due to its high mass, the black hole has to be spinning rapidly for the tidal disruption to occur outside its event horizon. Additional details of the upcoming Astrophysics' seminars can be found on the following link. ‏האירוע הזה כולל שיחת וידאו ב-Google Hangouts. הצטרף: https://plus.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.7dih1h195q324fhm7ctvu3vsvg&hs=121