2018ApJ...853....2G

Query : 2018ApJ...853....2G

2018ApJ...853....2G - Astrophys. J., 853, 2-2 (2018/January-3)

Detection of GeV gamma-ray emission in the direction of HESS J1731-347 with Fermi-LAT.

GUO X.-L., XIN Y.-L., LIAO N.-H., YUAN Q., GAO W.-H. and FAN Y.-Z.

Abstract (from CDS):

We report the detection of GeV γ-ray emission from supernova remnant HESS J1731-347 using 9 yr of Fermi Large Area Telescope data. We find a slightly extended GeV source in the direction of HESS J1731-347. The spectrum above 1 GeV can be fitted by a power law with an index of Γ = 1.77 ± 0.14, and the GeV spectrum connects smoothly with the TeV spectrum of HESS J1731-347. Either a hadronic-leptonic or a pure leptonic model can fit the multiwavelength spectral energy distribution of the source. However, the hard GeV γ-ray spectrum is more naturally produced in a leptonic (inverse Compton scattering) scenario, under the framework of diffusive shock acceleration. We also searched for the GeV γ-ray emission from the nearby TeV source HESS J1729-345. No significant GeV γ-ray emission is found, and upper limits are derived.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): gamma rays: general - gamma rays: ISM - ISM: individual objects: HESS J1731-347 - ISM: supernova remnants - ISM: supernova remnants

Nomenclature: Table 1: [GXL2018] Source T N=1, [GXL2018] Newpts A (Nos A-F).

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1314 1
2 NAME Pup A SNR 08 24 07 -42 59.8           ~ 636 1
3 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 507 2
4 ESO 134-11 HII 14 40 29 -62 38.7           ~ 585 1
5 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1407 1
6 4FGL J1533.9-5712e SNR 15 34 43.1982422 -57 09 35.999451           ~ 17 0
7 SNR G347.3-00.5 SNR 17 12 27 -39 41.2     12.27     ~ 761 1
8 SNR G348.7+00.3 SNR 17 13 43.0 -38 10 12           ~ 134 2
9 [GXL2018] Newpts D gam 17 23 28 -33 42.2           ~ 1 0
10 HESS J1729-345 gam 17 28 58.43253 -34 31 35.8140           ~ 18 0
11 [GXL2018] Newpts E gam 17 29 04 -36 14.0           ~ 1 0
12 [GXL2018] Newpts C gam 17 29 07 -35 03.1           ~ 1 0
13 [GXL2018] Newpts B gam 17 30 31 -33 52.9           ~ 1 0
14 GAL 353.4-00.4 HII 17 30 31.4 -34 40 59           ~ 20 0
15 [GXL2018] Source T gam 17 31 36 -34 46.5           ~ 1 0
16 SNR G353.6-00.7 SNR 17 31 55.0 -34 42 36           ~ 172 0
17 XMMU J173203.3-344518 X 17 32 03.3 -34 45 18           ~ 40 0
18 [GXL2018] Newpts A gam 17 36 12 -34 22.2           ~ 1 0
19 [GXL2018] Newpts F gam 17 40 39 -34 30.0           ~ 1 0
20 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 1034 2
21 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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