Discovery of the radio and X-ray counterpart of TeV Gamma-ray source HESS J1731-347

Abstract

We discover a faint shell-type radio and X-ray source, G353.6-0.7, associated with HESS J1731-347. G353.6-0.7 is likely an old supernova remnant (SNR), based on radio (0.8 GHz, 1.4 GHz and 5 GHz), infrared (8 $\mu$m from the GLIMPSE Legacy Project and 21 $\mu$m from the Midcourse Space Experiment), and X-ray (0.1 keV - 2.4 keV from the ROSAT survey and 5 - 20 keV from the INTEGRAL survey) data. The SNR, centered at ({\sl l}, {\sl b})=(353.55, -0.65) with a radius of $\sim$ 0.25${}^{\circ }$, closely matches the outline of the recently discovered extended TeV source HESS J1731-347, which has no previously identified counterpart. A diffuse X-ray enhancement detected in the ROSAT all-sky survey is coincident with lower half shell of the SNR. Therefore the SNR is the best radio counterpart of both the HESS source and the diffuse X-ray enhancement. G353.6-0.7 has an age of $\sim$ 27000 yrs. Altogether, the new discovery provides the best case that an old SNR emits TeV $\gamma$-rays.

4 pages, 3 figures, accepted by ApJ Letters

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Cited by in corpus (16)

• The gas-to-extinction ratio and the gas distribution in the Galaxy
• The neutron star in HESS J1731-347: CCOs as laboratories to study the equation of state of superdense matter
• Unified model for the gamma-ray emission of supernova remnants
• Interstellar protons in the TeV gamma-ray SNR HESS J1731-347:Possible evidence for the coexistence of hadronic and leptonic gamma-rays
• Distance Determination to the Crab-like PWN G54.1+0.3 and Search for its Supernova Remnant Shell
• Modeling the X-rays from the Central Compact Object PSR J1852+0040 in Kesteven 79: Evidence for a Strongly Magnetized Neutron Star
• Detection of two TeV shell-type remnants at GeV energies with Fermi-LAT: HESS J1731-347 and SN 1006
• Probing The Local Environment of the Supernova Remnant HESS J1731-347 with CO and CS Observations
• Fermi Large Area Telescope observations of the supernova remnant HESS J1731-347
• Detection of GeV $\gamma$-ray emission in the direction of HESS J1731-347 with Fermi-LAT
• Is HESS J1912+101 associated with an old Supernova Remnant?
• Dense molecular gas at 12 mm towards Galactic TeV gamma-ray sources
• XMM-Newton observations of the non-thermal supernova remnant HESS J1731-347 (G353.6-0.7)
• The structure of TeV-bright shell-type supernova remnants
• Cosmic ray backgrounds for dark matter indirect detection
• Status of Very High Energy gamma-ray Astronomy as of early 2008