Discovery of very-high-energy gamma-ray emission from the vicinity of PSR J1913+1011 with H.E.S.S

Abstract

The H.E.S.S. experiment, an array of four Imaging Atmospheric Cherenkov Telescopes with high sensitivity and large field-of-view, has been used to search for emitters of very-high-energy (VHE, >100 GeV) gamma-rays along the Galactic plane, covering the region 30 deg < l < 60 deg, 280 deg < l < 330 deg, and -3 deg < b < 3 deg. In this continuation of the H.E.S.S. Galactic Plane Scan, a new extended VHE gamma-ray source was discovered at alpha(2000)=19h12m49s, delta(2000)=+10d09'06'' (HESS J1912+101). Its integral flux between 1-10 TeV is ~10% of the Crab Nebula flux in the same energy range. The measured energy spectrum can be described by a power law with a photon index Gamma = 2.7+-0.2(stat)+-0.3(sys). HESS J1912+101 is plausibly associated with the high spin-down luminosity pulsar PSR J1913+1011. We also discuss associations with an as yet unconfirmed SNR candidate proposed from low frequency radio observation and/or with molecular clouds found in 13CO data.

6 pages, 2 figures; Accepted for publication in A&A on February 20, 2008

References in corpus (9)

• The ATNF Pulsar Catalogue
• Observations of the Crab Nebula with H.E.S.S
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• Background Modelling in Very-High-Energy gamma-ray Astronomy
• Primary particle acceleration above 100 TeV in the shell-type Supernova Remnant RX J1713.7-3946 with deep H.E.S.S. observations
• First detection of a VHE gamma-ray spectral maximum from a Cosmic source: H.E.S.S. discovery of the Vela X nebula
• H.E.S.S. observations of the supernova remnant RX J0852.0-4622: shell-type morphology and spectrum of a widely extended VHE gamma-ray source
• Energy dependent gamma-ray morphology in the Pulsar wind nebula HESSJ1825-137
• HESS Observations and VLT Spectroscopy of PG 1553+113

Cited by in corpus (18)

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• Constraints on the Galactic Population of TEV Pulsar Wind Nebulae Using Fermi Large Area Telescope Observations
• TeV gamma-ray survey of the Northern sky using the ARGO-YBJ detector
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• Detection of Intra-day Variability Timescales of Four High Energy Peaked Blazars with XMM-Newton
• Detection of Very High Energy radiation from HESS J1908+063 confirms the Milagro unidentified source MGRO J1908+06
• A search for new supernova remnant shells in the Galactic plane with H.E.S.S
• Observation of the TeV gamma-ray source MGRO J1908+06 with ARGO-YBJ
• Discovery of the source HESS J1356-645 associated with the young and energetic PSR J1357-6429
• PSR J1856+0245: Arecibo Discovery of a Young, Energetic Pulsar Coincident with the TeV Gamma-ray Source HESS J1857+026
• Search for Pulsar Wind Nebula Associations of Unidentified TeV Gamma-Ray Sources
• TeV cosmic ray nuclei acceleration in shell-type supernova remnants with hard $\gamma$-ray spectra
• Is HESS J1912+101 associated with an old Supernova Remnant?
• Dense molecular gas at 12 mm towards Galactic TeV gamma-ray sources
• Expectation on Observation of Supernova Remnants with the LHAASO Project
• Polarised radio emission associated with HESS J1912+101
• Features of the gamma-ray pulsar halo HESS J1831$-$098
• Hadronic Scenario for Galactic PeVatron LHAASO J1912+1014u Supported by Fermi-LAT $\gamma$-ray Data and FUGIN CO Data