PT Journal AU HAWC Collaboration (Albert, Aea Salesa Greus, F TI HAWC Study of the Ultra-high-energy Spectrum of MGRO J1908+06 SO Astrophysical Journal JI Astrophys. J. PY 2022 BP 116 EP 13pp VL 928 IS 2 DI 10.3847/1538-4357/ac56e5 LA English AB We report TeV gamma-ray observations of the ultra-high-energy source MGRO J1908+06 using data from the High Altitude Water Cherenkov Observatory. This source is one of the highest-energy known gamma-ray sources, with emission extending past 200 TeV. Modeling suggests that the bulk of the TeV gamma-ray emission is leptonic in nature, driven by the energetic radio-faint pulsar PSR J1907+0602. Depending on what assumptions are included in the model, a hadronic component may also be allowed. Using the results of the modeling, we discuss implications for detection prospects by multi-messenger campaigns. ER