Search for gamma-ray production in supernovae located in a dense circumstellar medium with fermi-LAT

Anna Franckowiak, Kohta Murase, Eran Ofek

Research output: Contribution to journalConference articlepeer-review

Abstract

Supernovae (SNe) exploding in a dense circumstellar medium (CSM) are predicted to accelerate cosmic rays in collisionless shocks and emit GeV gamma rays and TeV neutrinos on a time scale of several months. Here we summarize the results of the first systematic search for gamma-ray emission in Fermi-LAT data in the energy range from 100 MeV to 300 GeV from a large sample of SNe exploding in dense CSM. We search for a gamma-ray excess at the position of 147 SNe Type IIn in a one year time window after the optical peak time. In addition we combine the closest and optically brightest sources of our sample in a joint likelihood analysis in three different time windows (3, 6 and 12 months). No excess gamma-ray emission is found and limits on the gammaray luminosity and the ratio of gamma-ray to optical luminosity are presented.

Original languageEnglish (US)
Article number702
JournalProceedings of Science
Volume30-July-2015
StatePublished - Jan 1 2015
Event34th International Cosmic Ray Conference, ICRC 2015 - The Hague, Netherlands
Duration: Jul 30 2015Aug 6 2015

All Science Journal Classification (ASJC) codes

  • General

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