The Likely Fermi detection of the supernova remnant SN 1006

TL;DR

This study reports the likely detection of GeV gamma-ray emission from SN 1006 using Fermi LAT data, supporting the leptonic origin of its broadband emission and confirming its shell-like morphology in gamma rays.

Contribution

First detection of GeV gamma-ray emission from SN 1006, linking it to TeV emission and supporting leptonic models for its broadband spectrum.

Findings

Gamma-ray source detected with 4 sigma significance

Position and spectrum match TeV emission from SN 1006

Broadband spectrum consistent with leptonic scenario

Abstract

We report the likely detection of gamma-ray emission from the northeast shell region of the historical supernova remnant (SNR) SN 1006. Having analyzed 7 years of Fermi LAT Pass 8 data for the region of SN 1006, we found a GeV gamma-ray source detected with 4 sigma significance. Both the position and spectrum of the source match those of HESS J1504-418 respectively, which is TeV emission from SN 1006. Considering the source as the GeV gamma-ray counterpart to SN~1006, the broadband spectral energy distribution is found to be approximately consistent with the leptonic scenario that has been proposed for the TeV emission from the SNR. Our result has likely confirmed the previous study of the SNRs with TeV shell-like morphology: SN 1006 is one of them sharing very similar peak luminosity and spectral shape.