Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC

HAWC Collaboration: A.U. Abeysekara; A. Albert; R. Alfaro; J.R.; Angeles Camacho; J.C. Arteaga-Vel\'azquez; K.P. Arunbabu; D. Avila Rojas,; H.A. Ayala Solares; V. Baghmanyan; E. Belmont-Moreno; S.Y. BenZvi; C.; Brisbois; K.S. Caballero-Mora; T. Capistr\'an; A. Carrami\~nana; S. Casanova,; U. Cotti; J. Cotzomi; S. Couti\~no de Le\'on; E. De la Fuente; C. de Le\'on,; S. Dichiara; B.L. Dingus; M.A. DuVernois; J.C. D\'iaz-V\'elez; R.W.; Ellsworth; K. Engel; C. Espinoza; H. Fleischhack; N. Fraija; A.; Galv\'an-G\'amez; D. Garcia; J.A. Garc\'ia-Gonz\'alez; F. Garfias; M.M.; Gonz\'alez; J.A. Goodman; J.P. Harding; S. Hernandez; J. Hinton; B. Hona; D.; Huang; F. Hueyotl-Zahuantitla; P. H\"untemeyer; A. Iriarte; A. Jardin-Blicq,; V. Joshi; S. Kaufmann; D. Kieda; A. Lara; W.H. Lee; H. Le\'on Vargas; J.T.; Linnemann; A.L. Longinotti; G. Luis-Raya; J. Lundeen; R. L\'opez-Coto; K.; Malone; S.S. Marinelli; O. Martinez; I. Martinez-Castellanos; J.; Mart\'inez-Castro; H. Mart\'inez-Huerta; J.A. Matthews; P. Miranda-Romagnoli,; J.A. Morales-Soto; E. Moreno; M. Mostaf\'a; A. Nayerhoda; L. Nellen; M.; Newbold; M.U. Nisa; R. Noriega-Papaqui; A. Peisker; E.G. P\'erez-P\'erez; J.; Pretz; Z. Ren; C.D. Rho; C. Rivi\`ere; D. Rosa-Gonz\'alez; M. Rosenberg; E.; Ruiz-Velasco; F. Salesa Greus; A. Sandoval; M. Schneider; H. Schoorlemmer; G.; Sinnis; A.J. Smith; R.W. Springer; P. Surajbali; E. Tabachnick; M. Tanner; O.; Tibolla; K. Tollefson; I. Torres; R. Torres-Escobedo; L. Villase\~nor; T.; Weisgarber; J. Wood; T. Yapici; H. Zhang; and H. Zhou

arXiv:1909.08609·astro-ph.HE·January 16, 2020

Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC

HAWC Collaboration: A.U. Abeysekara, A. Albert, R. Alfaro, J.R., Angeles Camacho, J.C. Arteaga-Vel\'azquez, K.P. Arunbabu, D. Avila Rojas,, H.A. Ayala Solares, V. Baghmanyan, E. Belmont-Moreno, S.Y. BenZvi, C., Brisbois, K.S. Caballero-Mora, T. Capistr\'an, A. Carrami\~nana

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TL;DR

This paper presents the first catalog of gamma-ray sources emitting above 56 TeV detected by HAWC, including sources that emit past 100 TeV, advancing understanding of the highest-energy gamma-ray emitters in our galaxy.

Contribution

The paper provides the first catalog of ultra-high-energy gamma-ray sources above 56 TeV, including the identification of sources emitting beyond 100 TeV and their spectral analysis.

Findings

01

Nine sources detected above 56 TeV, all likely Galactic.

02

Three sources emit past 100 TeV, the highest-energy gamma-ray sources cataloged.

03

Spectral analysis suggests some sources may be PeVatrons.

Abstract

We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from the High Altitude Water Cherenkov (HAWC) 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.

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