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Detailed Analysis of the TeV γ-Ray Sources 3HWC J1928+ 178, 3HWC J1930+ 188, and the New Source HAWC J1932+ 192

Abstract:

The latest High Altitude Water Cherenkov (HAWC) point-like source catalog up to 56 TeV reported the detection of two sources in the region of the Galactic plane at galactic longitude 52< ℓ< 55, 3HWC J1930+ 188 and 3HWC J1928+ 178. The first one is associated with a known TeV source, the supernova remnant SNR G054. 1+ 00.3. It was discovered by one of the currently operating Imaging Atmospheric Cherenkov Telescope (IACT), the Very Energetic Radiation Imaging Telescope Array System (VERITAS), detected by the High Energy Stereoscopic System (HESS), and identified as a composite SNR. However, the source 3HWC J1928+ 178, discovered by HAWC and coincident with the pulsar PSR J1928+ 1746, was not detected by any IACT despite their long exposure on the region, until a recent new analysis of HESS data was able to confirm it. Moreover, no X-ray counterpart has been detected from this …