[Okc-wp4] EO seminar May 7th: Milena Crnogorčević: Do We See Superluminous Supernovae in Gamma Rays?

[Haakon Andresen]

Reminder of today's meeting, note the unusual meeting place FC61.

________________________________
From: Okc-wp4-at-fysik.su.se <okc-wp4-at-fysik.su.se-bounces at lists.su.se> on behalf of Haakon Andresen via Okc-wp4-at-fysik.su.se <okc-wp4-at-fysik.su.se at lists.su.se>
Sent: 04 May 2026 11:04:26
To: EO meeting email
Subject: [Okc-wp4] EO seminar May 7th: Milena Crnogorčević: Do We See Superluminous Supernovae in Gamma Rays?


Dear Everyone,


This week we will have a seminar by Milena Crnogorčević. We meed at 13:15 on May 7th.

Importantly, we will meet in FC61 and not our normal room. FC61 is in the astro department on the 6th floor.



Do We See Superluminous Supernovae in Gamma Rays?
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.



Best,
Haakon (on behalf of the organisers)


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