Abeysekara, A. U.A. U.AbeysekaraArcher, A.A.ArcherBenbow, W.W.BenbowCavazzuti, ElisabettaElisabettaCavazzutiCiprini, StefanoStefanoCipriniCutini, SaraSaraCutiniGasparrini, DarioDarioGasparrini2020-09-172020-09-172018-10-01https://hdl.handle.net/20.500.13025/5541The Astrophysical Journal, Volume 866, Issue 1, article id. 24, <NUMPAGES>18</NUMPAGES> pp. (2018).The High Altitude Water Cherenkov (HAWC) collaboration recently published their 2HWC catalog, listing 39 very high energy (VHE; >100 GeV) gamma-ray sources based on 507 days of observation. Among these, 19 sources are not associated with previously known teraelectronvolt (TeV) gamma-ray sources. We have studied 14 of these sources without known counterparts with VERITAS and Fermi-LAT. VERITAS detected weak gamma-ray emission in the 1 TeV--30 TeV band in the region of DA 495, a pulsar wind nebula coinciding with 2HWC J1953+294, confirming the discovery of the source by HAWC. We did not find any counterpart for the selected 14 new HAWC sources from our analysis of Fermi-LAT data for energies higher than 10 GeV. During the search, we detected gigaelectronvolt (GeV) gamma-ray emission coincident with a known TeV pulsar wind nebula, SNR G54.1+0.3 (VER J1930+188), and a 2HWC source, 2HWC J1930+188. The fluxes for isolated, steady sources in the 2HWC catalog are generally in good agreement with those measured by imaging atmospheric Cherenkov telescopes. However, the VERITAS fluxes for SNR G54.1+0.3, DA 495, and TeV J2032+4130 are lower than those measured by HAWC, and several new HAWC sources are not detected by VERITAS. This is likely due to a change in spectral shape, source extension, or the influence of diffuse emission in the source region.gamma rays general10.3847/1538-4357/aade4ehttp://adsabs.harvard.edu/abs/2018ApJ...866...24A2018ApJ...866...24A