Speaker
Description
LS 5039 is a high mass X-ray binary with an orbital periodicity of 3.9 days located about 1.5 degrees from the galactic plane. Previously, the H.E.S.S. telescope detected very high energy gamma-ray emissions from this source and measured the spectral energy in a broad inferior conjunction phase (0.45<phi<0.9) and a complimentary superior conjunction phase. However, the behavior of the emission spectrum beyond tens of TeV remains unclear. The High-Altitude Water Cherenkov (HAWC) gamma-ray observatory recently disentangled gamma-ray emission of LS 5039 from the emission of other objects in a complex galactic plane region using a multi-source model fit. An artificial neural network was applied to reconstruct the energies of the gamma-rays. The preliminary HAWC measurement shows that the spectral energy distribution of LS 5039 extends beyond tens of TeV without suppression. In a further analysis, the fluxes in the superior and inferior conjunction phases are measured separately. We will present these flux measurements between ~1 TeV and >100 TeV.
| Collaboration name | HAWC |
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