Study of HESS J1857 with HAWC for a Multi-wavelength Analysis

The High Energy Stereoscopic System (H.E.S.S.) collaboration reported the emission of two extended sources, HESS J1857+027 and HESS J1858+020, separated by ∼ 1^◦, both lacking known counterparts. However, in the 3HWC catalog, the High-Altitude Water Cherenkov (HAWC) collaboration reported the emission of 3HWC J1857+027. We present a multi-source fitting analysis of the HESS J1857 region with ∼2860 days of observations from the HAWC observatory as part of a multi-wavelength study effort to better understand the emission mechanisms of HESS J1857+026. With the improved performance and enriched statistics, we can now resolve the emission from both sources in the region beyond tens of TeV and observe a cutoff in the emission for J1857 for energies beyond ∼30 TeV.