Milena Crnogorčević: Do We See Superluminous Supernovae in Gamma Rays?

Thursday 7 May 2026, 13:15 → 14:00 Europe/Stockholm

FC61

I’ll present our new paper (with Tim Linden, Ariel Goobar, and Brian Metzger) searching for GeV emission from the largest sample of SLSNe to date. Using 17 years of Fermi-LAT data and physically motivated transparency windows, we find no population-level detections and place strong constraints on gamma-ray efficiency—well below standard model predictions. However, one source (SN 2017egm) shows a suggestive excess that is well described by a magnetar model, hinting that gamma-ray-bright SLSNe may exist but are rare or diverse.