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Discovery of a point-like very-high-energy gamma-ray source in Monoceros

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arxiv 0704.0171 v1 pith:GARSUNWO submitted 2007-04-02 astro-ph

classification astro-ph
keywords gamma-raysourceregionmonocerossourcesassociateddatadiscovery
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The complex Monoceros Loop SNR/Rosette Nebula region contains several potential sources of very-high-energy (VHE) gamma-ray emission and two as yet unidentified high-energy EGRET sources. Sensitive VHE observations are required to probe acceleration processes in this region. The H.E.S.S. telescope array has been used to search for very high-energy gamma-ray sources in this region. CO data from the NANTEN telescope were used to map the molecular clouds in the region, which could act as target material for gamma-ray production via hadronic interactions. We announce the discovery of a new gamma-ray source, HESS J0632+058, located close to the rim of the Monoceros SNR. This source is unresolved by H.E.S.S. and has no clear counterpart at other wavelengths but is possibly associated with the weak X-ray source 1RXS J063258.3+054857, the Be-star MWC 148 and/or the lower energy gamma-ray source 3EG J0634+0521. No evidence for an associated molecular cloud was found in the CO data.

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Cited by 2 Pith papers

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  1. Large-scale emission from gamma-ray binaries: the case of LS 5039

    astro-ph.HE 2026-07 conditional novelty 6.0 of 10

    The arcminute X-ray emission around LS 5039 is consistently explained as synchrotron radiation from electrons accelerated at the termination shock of the mixed stellar/pulsar wind, with different source ages giving co...

  2. Fermi-LAT and FAST observation of the gamma-ray binary HESS J0632+057

    astro-ph.HE 2025-04 conditional novelty 5.0 of 10

    Fermi-LAT data spanning 15 years yield a power-law GeV spectrum for HESS J0632+057 with a possible 10-100 GeV turnover, and FAST observations set a 2 microJy upper limit on radio pulsations from the system.

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