Fermi-LAT detection of GeV $gamma$-ray emission from Type Ia supernova remnant G272.2-3.2. (arXiv:2103.15384v4 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Xiang_Y/0/1/0/all/0/1">Yun-Chuan Xiang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jiang_Z/0/1/0/all/0/1">Ze-Jun Jiang</a>
A new $gamma$-ray source with a significance level of approximately
5$sigma$ was identified in the region of SNR G272.2-3.2, using Fermitools and
data from 12.4 yr of observations from the Fermi Large Area Telescope
(Fermi-LAT). Its $gamma$-ray spatial distribution did not have extended
feature, and it had a soft spectrum with a power-law spectral index of
2.56$pm$0.01. No significant LC variability was identified, and its spatial
positions in the X-ray and GeV bands overlapped. We suggest that the new
$gamma$-ray source is likely to be a counterpart to SNR G272.2-3.2. Combined
with its spectrum, we discussed the likely origins of the $gamma$-ray
emission.
A new $gamma$-ray source with a significance level of approximately
5$sigma$ was identified in the region of SNR G272.2-3.2, using Fermitools and
data from 12.4 yr of observations from the Fermi Large Area Telescope
(Fermi-LAT). Its $gamma$-ray spatial distribution did not have extended
feature, and it had a soft spectrum with a power-law spectral index of
2.56$pm$0.01. No significant LC variability was identified, and its spatial
positions in the X-ray and GeV bands overlapped. We suggest that the new
$gamma$-ray source is likely to be a counterpart to SNR G272.2-3.2. Combined
with its spectrum, we discussed the likely origins of the $gamma$-ray
emission.
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