Very high energy Fermi/LAT detection of HESS J0632+057

Abstract

We report on the results of ~7 yrs of the very-high energy (10-600 GeV) observations of HESS J0632+057 with FERMI/LAT. In the highest energy band, 200-600 GeV, the source is clearly detected with the statistical significance >3.6sigma at orbital phases 0.2-0.4 and 0.6-0.8 at which HESS J0632+057 is known to demonstrate enhanced emission in TeV energy band. The analysis did not reveal the emission from HESS J0632+057 at lower energies and different orbital phases. Using the upper limits on source's flux we locate the break of the spectrum to >80 GeV and low-energy slope <2.0 (2sigma statistical significance).

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References in corpus (5)

• 2FHL: The Second Catalog of Hard Fermi-LAT Sources
• Discovery of a point-like very-high-energy gamma-ray source in Monoceros
• HESS J0632+057 : A new gamma-ray binary?
• Probing the nature of the TeV gamma-ray binary HESS J0632+057 by monitoring Be disk variability
• A rotating hollow cone anisotropy of TeV emission from binary systems

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• GeV detection of HESS J0632+057
• A hydrodynamics-informed, radiation model for HESS J0632$+$057 from radio to gamma rays
• Decade-long X-ray observations of HESS J0632+057
• X-ray imaging observations of the high-mass gamma-ray binary HESS J0632+057
• Analysis Methods for Gamma-ray Astronomy