Detection of Two TeV Shell-type Remnants at GeV Energies with FERMI LAT: HESS J1731-347 and SN 1006

被引：21

作者：

Condon, B. ^{[1
]}

Lemoine-Goumard, M. ^{[1
]}

Acero, F. ^{[2
]}

Katagiri, H. ^{[3
]}

机构：

[1] Univ Bordeaux 1, CNRS, Ctr Etud Nucl Bordeaux Gradignan, IN2P3, BP120, F-33175 Gradignan, France

[2] Univ Paris Diderot, Lab AIM, CEA Saclay, CEA IRFU,CNRS, F-91191 Gif Sur Yvette, France

[3] Ibaraki Univ, Coll Sci, 2-1-1,Bunkyo, Mito, Ibaraki 3108512, Japan

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 851卷 / 02期

关键词：

acceleration of particles; cosmic rays; ISM: individual objects (HESS J1731-347; SN; 1006); ISM: supernova remnants; GAMMA-RAY EMISSION; SUPERNOVA; ACCELERATION; RX-J0852.0-4622; DISCOVERY;

D O I：

10.3847/1538-4357/aa9be8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first high-significance GeV gamma-ray detections of supernova remnants HESS J1731-347 and SN 1006, both of which have been previously detected by imaging atmospheric Cherenkov Telescopes above 1 TeV. Using 8 years of Fermi-LAT Pass 8 data at energies between 1 GeV and 2 TeV, we detect emission at the position of HESS. J1731-347 with a significance of similar to 5 sigma and a spectral index of Gamma= 1.66 +/- 0.16(stat) +/- 0.12(syst). The hardness of the index and the good connection with the TeV spectrum of HESS J1731-347 support an association between the two sources. We also confirm the detection of SN. 1006 at similar to 6 sigma with a spectral index of Gamma= 1.79 +/- 0.17(stat) +/- 0.27(syst). The northeast (NE) and southwest (SW) limbs of SN. 1006 were also fit separately, resulting in the detection of the NE region (Gamma= 1.47 +/- 0.26(stat)) and the non-detection of the SW region. The significance of different spectral components for the two limbs is 3.6 sigma, providing first indications of an asymmetry in the GeV gamma-ray emission.

引用

页数：7

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