Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC
A. U. Abeysekara, A. Albert, R. Alfaro, José Roberto Ángeles Camacho, J. C. Arteaga-Velázquez, K. P. Arunbabu, D. Avila Rojas, H. A. Ayala Solares, Vardan Baghmanyan, E. Moreno, S. BenZvi, C. Brisbois, K. S. Caballero‐Mora, T. Capistrán, A. Carramiñana, S. Casanova, U. Cotti, J. Cotzomi, S. Coutinõ de León, E. De la Fuente, C. de León, S. Dichiara, B. L. Dingus, M. A. DuVernois, J. C. Díaz–Vélez, R. W. Ellsworth, K. Engel, C. Espinoza, Henrike Fleischhack, N. Fraija, A. Galván-Gaméz, D. García, J. A. García-González, F. Garfias, M. M. González, J. A. Goodman, J. P. Harding, S. Hernández, J. A. Hinton, B. Hona, D. Huang, F. Hueyotl‐Zahuantitla, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, Vikas Joshi, S. Kaufmann, D. Kieda, A. Lara, W. H. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, J. Lundeen, R. López-Coto, K. Malone, S. S. Marinelli, O. Martı́nez, I. Martínez-Castellanos, J. Martínez-Castro, H. Martínez-Huerta, J. A. Matthews, P. Miranda-Romagnoli, J. A. Morales-Soto, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, Alison Peisker, E. G. Pérez-Pérez, J. Pretz, Zhixiang Ren, Chang Dong Rho, C. Rivière, D. Rosa‐González, M. Rosenberg, E. Ruiz-Velasco, F. Salesa Greus, A. Sandoval, M. Schneider, Harm Schoorlemmer, G. Sinnis, A. J. Smith, R. W. Springer, P. Surajbali, E. Tabachnick, Meghan Tanner, O. Tibolla, Kirsten Tollefson, I. Torres, R. Torres-Escobedo, L. Villaseñor, T. Weisgarber, J. Wood, T. Yapici, H Zhang
Abstract
We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from the High Altitude Water Cherenkov Observatory, a wide field-of-view observatory capable of detecting gamma rays up to a few hundred TeV. Nine sources are observed above 56 TeV, all of which are likely galactic in origin. Three sources continue emitting past 100 TeV, making this the highest-energy gamma-ray source catalog to date. We report the integral flux of each of these objects. We also report spectra for three highest-energy sources and discuss the possibility that they are PeVatrons.