Fermi-LAT detection of GeV \(\gamma\)-ray emission from Type Ia supernova remnant G272.2-3.2

A new \(\gamma\)-ray source with a significance level of approximately 5\(\sigma\) was reported in the region of SNR G272.2-3.2, analysing the approximately 12.4 years of observation data from the Fermi Large Area Telescope (Fermi-LAT). Its \(\gamma\)-ray spatial distribution did not show extended f...

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Bibliographic Details
Published in:arXiv.org 2021-06
Main Authors: Yun-Chuan Xiang, Ze-Jun Jiang
Format: Article
Language:English
Subjects:
Emission analysis
Gamma emission
Gamma rays
Light curve
Spatial distribution
Spectral energy distribution
Supernova remnants
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Summary:A new \(\gamma\)-ray source with a significance level of approximately 5\(\sigma\) was reported in the region of SNR G272.2-3.2, analysing the approximately 12.4 years of observation data from the Fermi Large Area Telescope (Fermi-LAT). Its \(\gamma\)-ray spatial distribution did not show extended feature, and it had a soft spectrum with the spectral index of 2.56\(\pm\)0.01 of a power-law model. No significant variability of its light curve (LC) with 10 time bins was identified, and its spatial positions in the X-ray and GeV bands overlapped. We suggest that the new \(\gamma\)-ray source is a likely counterpart of SNR G272.2-3.2. Analysing its spectrum, we discussed the likely origins of the \(\gamma\)-ray emission.
ISSN:2331-8422
DOI:10.48550/arxiv.2103.15384