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HAWC J2227+610 and its association with G106.3+2.7, a new potential Galactic PeVatron

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arxiv 2005.13699 v1 pith:AOSFQOIT submitted 2020-05-27 astro-ph.HE

HAWC J2227+610 and its association with G106.3+2.7, a new potential Galactic PeVatron

A. Albert , R. Alfaro , C. Alvarez , J.R. Angeles Camacho , J.C. Arteaga-Vel\'azquez , K.P. Arunbabu , D. Avila Rojas , H.A. Ayala Solares
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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 L. Diaz-Cruz B.L. Dingus M.A. DuVernois J.C. D\'iaz-V\'elez R.W. Ellsworth K. Engel C. Espinoza K.L. Fan K. Fang M. Fern\'andez Alonso H. Fleischhack N. Fraija A. Galv\'an-G\'amez D. Garcia J.A. Garc\'ia-Gonz\'alez F. Garfias G. Giacinti 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 W.H. Lee H. Le\'on Vargas J.T. Linnemann A.L. Longinotti G. Luis-Raya J. Lundeen K. Malone S.S. Marinelli O. Martinez I. Martinez-Castellanos J. Mart\'inez-Castro 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 N. Omodei A. Peisker Y. P\'erez Araujo E.G. P\'erez-P\'erez C.D. Rho D. Rosa-Gonz\'alez E. Ruiz-Velasco H. Salazar F. Salesa Greus A. Sandoval M. Schneider H. Schoorlemmer J. Serna Franco G. Sinnis A.J. Smith R.W. Springer P. Surajbali E. Tabachnick M. Tanner O. Tibolla K. Tollefson I. Torres R. Torres-Escobedo F. Ure\~na-Mena L. Villase\~nor T. Weisgarber A. Zepeda H. Zhou C. de Le\'on J.D. \'Alvarez
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keywords emissionhawcj2227g106galacticgamma-raypevatronprotons
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We present the detection of VHE gamma-ray emission above 100 TeV from HAWC J2227+610 with the HAWC observatory. Combining our observations with previously published results by VERITAS, we interpret the gamma-ray emission from HAWC J2227+610 as emission from protons with a lower limit in their cutoff energy of 800 TeV. The most likely source of the protons is the associated supernova remnant G106.3+2.7, making it a good candidate for a Galactic PeVatron. However, a purely leptonic origin of the observed emission cannot be excluded at this time.

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