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    Abeysekara, A. U.; Archer, A.; Chromey, A. J.; Cui, W.; Daniel, M. K.; Feng, Q.; Finley, J. P.; Hervet, O.; Humensky, T. B.; Kertzman, M.; McArthur, S.; Mukherjee, R.; O'Brien, S.; Otte, A. N.; Pohl, M.; Pueschel, E.; Ragan, K.; Richards, G. T.; Roache, E.; Sembroski, G. H.; Shahinyan, K.; Tyler, J.; Weinstein, A.; Wilcox, P.; Wilhelm, A.; Williams, D. A.; Ajello, M.; Barbiellini, G.; Bellazzini, R.; Bissaldi, E.; Bonino, R.; Brandt, T. J.; Buehler, R.; Cavazzuti, E.; Chiaro, G.; Cohen-Tanugi, J.; Cutini, S.; Domínguez, A.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gasparrini, D.; Giglietto, N.; Green, D.; Guiriec, S.; Horan, D.; Kensei, S.; Larsson, S.; Loparco, F.; Lubrano, P.; Mazziotta, M. N.; Mizuno, T.; Ojha, R.; Omodei, N.; Persic, M.; Porter, T. A.; Rainò, S.; Rani, B.; Reimer, O.; Sgrò, C.; Siskind, E. J.; Spinelli, P.; Thayer, J. B.; Tosti, G.; Vogel, M.; Arceo, R.; BenZvi, S. Y.; Brisbois, C.; Cotzomi, J.; Fuente, E. De la; Enriquez-Rivera, O.; Fiorino, D. W.; Fleischhack, H.; Garfias, F.; Muñoz, A. González; Hampel-Arias, Z.; Iriarte, A.; Joshi, V.; Kaufmann, S.; Luis-Raya, G.; López-Coto, R.; Martínez-Castro, J.; Martínez-Huerta, H.; Miranda-Romagnoli, P.; Nellen, L.; Newbold, M.; Nisa, M. U.; Pelayo, R.; Ren, Z.; Rivière, C.; Rosa-González, D.; Greus, F. Salesa; Schneider, M.; Arroyo, M. Seglar; Tollefson, K.; Torres, I.; Westerhoff, S.; Wisher, I. G.; Wood, J.; Zhou, H.

    Astrophysical journal/˜The œAstrophysical journal, 10/2018, Letnik: 866, Številka: 1
    Journal Article

    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.