  The gamma-ray source 3HWC J1928+178, discovered by HAWC, is coincident with
the 82 kyr pulsar PSR J1928+1746, located 4 kpc away. It has not been reported
by any Imaging atmospheric Cherenkov Telescope (IACT), until the recent
detection of emission from this region by H.E.S.S., using an analysis adapted
to extended sources. No counterpart in GeV gamma-rays from Fermi-LAT data or in
X-ray has been reported so far. In this contribution, I give the
multiwavelength context of the region surrounding 3HWC J1928+178 and present a
multi-component model derived using the Multi-Mission Maximum Likelihood
framework (3ML). I explore the possibility to model the gamma-ray emission of
3HWC J1928+178 by an extended source with continuous diffuse emission. Together
with the age of the pulsar and its extended nature, it may indicate a
transition from a pulsar wind nebulae to a halo, where the electrons have
started to cool and diffuse away from the source.

High Energy Astrophysical Phenomena