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2021ApJ...918...24X - Astrophys. J., 918, 24-24 (2021/September-1)

Fermi-LAT detection of GeV γ-ray emission from the Type Ia supernova remnant G272.2-3.2.

XIANG Y. and JIANG Z.

Abstract (from CDS):

A new γ-ray source with a significance level of approximately 5σ was reported in the region of the supernova remnant (SNR) G272.2-3.2 by analyzing the approximately 12.4 yr of observation data from the Fermi Large Area Telescope. Its γ-ray spatial distribution did not show an extended feature, and it had a soft spectrum with a spectral index of 2.56 ± 0.01 in the power-law model. No significant variability of its light curve with 10 time bins was identified, and its spatial positions in the X-ray and GeV bands overlapped. We suggest that the new γ-ray source is a likely counterpart of SNR G272.2-3.2. Analyzing its spectrum, we discussed the likely origins of the γ-ray emission.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Gamma-ray observatories - Gamma-ray astronomy - Type ia supernovae

Simbad objects: 16

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