GeV detection of HESS J0632+057
arXiv:1707.04280 · doi:10.3847/1538-4357/aa7ff7
Abstract
HESS J0632+057 is the only gamma-ray binary that has been detected at TeV energies, but not at GeV energies yet. Based on nearly nine years of Fermi Large Area Telescope (LAT) Pass 8 data, we report here on a deep search for the gamma-ray emission from HESS J0632+057 in the 0.1-300 GeV energy range. We find a previously unknown gamma-ray source, Fermi J0632.6+0548, spatially coincident with HESS J0632+057. The measured flux of Fermi J0632.6+0548 is consistent with the previous flux upper limit on HESS J0632+057 and shows variability that can be related to the HESS J0632+057 orbital phase. We propose that Fermi J0632.6+0548 is the GeV counterpart of HESS J0632+057. Considering the Very High Energy (VHE) spectrum of HESS J0632+057, a possible spectral turnover above 10 GeV may exist in Fermi J0632.6+0548, as appears to be common in other established gamma-ray binaries.
17 pages, 4 figures, 1 table; Accepted for publication in ApJ
References in corpus (15)
- Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
- Gamma-ray binaries: pulsars in disguise ?
- Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
- Discovery of High-Energy Gamma-Ray Emission from the Binary System PSR B1259-63/LS 2883 Around Periastron with Fermi
- Understanding the Very High-Energy Emission from Microquasars
- Discovery of a point-like very-high-energy gamma-ray source in Monoceros
- HESS J0632+057 : A new gamma-ray binary?
- Periodic Emission from the Gamma-ray Binary 1FGL J1018.6-5856
- Episodic Transient Gamma-Ray Emission from the Microquasar Cygnus X-1
- A Luminous Gamma-ray Binary in the Large Magellanic Cloud
- Chandra Observations of the Gamma-ray Binary LSI+61303: Extended X-ray Structure?
- Pulsar wind zone processes in LS 5039
- Superorbital modulation of X-ray emission from gamma-ray binary LSI +61 303
- gamma-ray emission from LS I +61 303: The impact of basic system uncertainties
- Fermi Large Area Telescope Observations of the Monoceros Loop Supernova Remnant
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- Probing the Properties of the Pulsar Wind in the Gamma-Ray Binary HESS J0632+057 with NuSTAR and VERITAS Observations
- Investigation of the broadband emission of the gamma-ray binary HESS J0632+057 using an intrabinary shock model
- Possible TeV -ray binary origin of HESS J1828-099