  The HAWC observatory recently published their second source catalog with 39
very high energy gamma-ray sources based on 507 days of exposure time. Among
these, there were 16 sources that are more than one degree away from any known
TeV source. We studied 13 of these 16 sources with VERITAS and
\textit{Fermi}-LAT data. VERITAS, an array of four imaging atmospheric
Cherenkov telescopes observing gamma rays with energies higher than 85 GeV, can
provide a more detailed image of the source with much shorter exposure time and
with better angular resolution. With \textit{Fermi}-LAT data, we searched for
the counterparts at lower energies (E>10 GeV). The exposure of VERITAS varies
among the 13 sources, and we used eight years of \textit{Fermi}-LAT data.
VERITAS found weak gamma-ray emission in the region of PWN~DA~495 coinciding
with 2HWC J1953+294 in this follow-up study. We will discuss the results
especially focusing on the PWN~DA~495 region and the SNR~G~54.1+0.3 region
where \textit{Fermi}-LAT detected a GeV counterpart of SNR~G~54.1+0.3, a known
TeV source detected by both VERITAS and HAWC.
