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The unidentified TeV source MGRO J1908+06, with emission extending fromhundreds of GeV to beyond 100TeV, is one of the most intriguing sources in theGalactic plane. MGRO J1908+06 spatially associates with an IceCube hotspot ofneutrino emission. Although the hotspot is not significant yet, this suggests apossible hadronic origin of the observed gamma-ray radiation. Here we describea multiwavelength analysis on MGRO J1908+06 to determine its nature. Weidentify, for the first time, an extended GeV source as the counterpart of MGROJ1908+06, discovering possibly associated molecular clouds (MCs). The GeVspectrum shows two well-differentiated components: a soft spectral componentbelow $\sim10$ GeV, and a hard one ($\Gamma\sim1.6$) above these energies. Thelower-energy part is likely associated with the dense MCs surrounding thesupernova remnant SNR G40.5$-$0.5, whereas the higher-energy component, whichconnects smoothly with the spectrum observed in TeV range, resembles theinverse Compton emission observed in relic pulsar wind nebulae. This simplescenario seems to describe the data satisfactorily, but raises questions aboutthe interpretation of the emission at hundreds of TeV. In this scenario, nodetectable neutrino flux would be expected.

Investigating the nature of MGRO J1908+06 with multiwavelength observations