The 2HWC HAWC Observatory Gamma-Ray Catalog
A. U. Abeysekara(University of Utah), A. Albert(Los Alamos National Laboratory), R. Alfaro(Universidad Nacional Autónoma de México), C. Álvarez(Universidad Autónoma de Chiapas), J. D. Álvarez(Universidad Michoacana de San Nicolás de Hidalgo), R. Arceo(Universidad Autónoma de Chiapas), J. C. Arteaga‐Velázquez(Universidad Michoacana de San Nicolás de Hidalgo), H. A. Ayala Solares(Michigan Technological University), A. S. Barber(University of Utah), B. M. Baughman(University of Maryland Extension), N. Bautista-Elivar(Universidad Politécnica de Pachuca), J. Becerra González(Goddard Space Flight Center), A. Becerril(Universidad Nacional Autónoma de México), E. Moreno(Universidad Nacional Autónoma de México), S. BenZvi(University of Rochester), D. Berley(University of Maryland Extension), A. Bernal(Universidad Nacional Autónoma de México), J. Braun(University of Wisconsin–Madison), C. Brisbois(Michigan Technological University), K. S. Caballero‐Mora(Universidad Autónoma de Chiapas), T. Capistrán(National Institute of Astrophysics, Optics and Electronics), A. Carramiñana(National Institute of Astrophysics, Optics and Electronics), S. Casanova(Institute of Nuclear Physics, Polish Academy of Sciences), M. Castillo(Universidad Michoacana de San Nicolás de Hidalgo), U. Cotti(Universidad Michoacana de San Nicolás de Hidalgo), J. Cotzomi(Benemérita Universidad Autónoma de Puebla), S. Coutinõ de León(National Institute of Astrophysics, Optics and Electronics), E. De la Fuente(Universidad de Guadalajara), C. De León(Benemérita Universidad Autónoma de Puebla), R. Díaz Hernández(National Institute of Astrophysics, Optics and Electronics), B. L. Dingus(Los Alamos National Laboratory), M. A. DuVernois(University of Wisconsin–Madison), J. C. Díaz–Vélez(Universidad de Guadalajara), R. W. Ellsworth(George Mason University), K. Engel(University of Maryland Extension), D. W. Fiorino(University of Maryland Extension), N. Fraija(Universidad Nacional Autónoma de México), J. A. García-González(Universidad Nacional Autónoma de México), F. Garfias(Universidad Nacional Autónoma de México), M. Gerhardt(Michigan Technological University), Alfonso Muñoz(Universidad Nacional Autónoma de México), M. M. González(Universidad Nacional Autónoma de México), J. A. Goodman(University of Maryland Extension), Z. Hampel-Arias(University of Wisconsin–Madison), J. P. Harding(Los Alamos National Laboratory), S. Hernández(Universidad Nacional Autónoma de México), A. Hernández-Almada(Universidad Nacional Autónoma de México), J. A. Hinton(Max Planck Institute for Nuclear Physics), C. M. Hui(Marshall Space Flight Center), P. Hüntemeyer(Michigan Technological University), A. Iriarte(Universidad Nacional Autónoma de México), A. Jardin-Blicq(Max Planck Institute for Nuclear Physics), Vikas Joshi(Max Planck Institute for Nuclear Physics), S. Kaufmann(Universidad Autónoma de Chiapas), D. Kieda(University of Utah), A. Lara(Universidad Nacional Autónoma de México), R. Lauer(University of New Mexico), W. H. Lee(Universidad Nacional Autónoma de México), D. Lennarz(Georgia Institute of Technology), H. León Vargas(Universidad Nacional Autónoma de México), J. Linnemann(Michigan State University), A. L. Longinotti(National Institute of Astrophysics, Optics and Electronics), G. Luis-Raya(Universidad Politécnica de Pachuca), R. Luna-García(Instituto Politécnico Nacional), R. López-Coto(Max Planck Institute for Nuclear Physics), K. Malone(Pennsylvania State University), S. S. Marinelli(Michigan State University), O. Martı́nez(Benemérita Universidad Autónoma de Puebla), I. Martínez-Castellanos(University of Maryland Extension), J. Martínez-Castro(Instituto Politécnico Nacional), H. Martínez-Huerta(Instituto Politécnico Nacional), J. Matthews(University of New Mexico), P. Miranda-Romagnoli(Universidad Autónoma del Estado de Hidalgo), E. Moreno(Benemérita Universidad Autónoma de Puebla), M. Mostafá(Pennsylvania State University), L. Nellen(Universidad Nacional Autónoma de México), M. Newbold(University of Utah), M. U. Nisa(University of Rochester), R. Noriega-Papaqui(Universidad Autónoma del Estado de Hidalgo), Rodrigo Pelayo(Instituto Politécnico Nacional), J. Pretz(Pennsylvania State University), E. G. Pérez‐Pérez(Universidad Politécnica de Pachuca), Zhixiang Ren(University of New Mexico), Chang Dong Rho(University of Rochester), C. Rivière(University of Maryland Extension), D. Rosa‐González(National Institute of Astrophysics, Optics and Electronics), M. Rosenberg(Pennsylvania State University), E. Ruiz-Velasco(Universidad Nacional Autónoma de México), H. Salazar(Benemérita Universidad Autónoma de Puebla), F. Salesa Greus(Institute of Nuclear Physics, Polish Academy of Sciences), A. Sandoval(Universidad Nacional Autónoma de México), M. Schneider(University of California, Santa Cruz), Harm Schoorlemmer(Max Planck Institute for Nuclear Physics), G. Sinnis(Los Alamos National Laboratory), A. J. Smith(University of Maryland Extension), R. W. Springer(University of Utah), P. Surajbali(Max Planck Institute for Nuclear Physics), I. Taboada(Georgia Institute of Technology), O. Tibolla(Universidad Autónoma de Chiapas), Kirsten Tollefson(Michigan State University), I. Torres(National Institute of Astrophysics, Optics and Electronics), T. N. Ukwatta(Los Alamos National Laboratory), G. Vianello(Stanford University), L. Villaseñor(Universidad Michoacana de San Nicolás de Hidalgo), T. Weisgarber(University of Wisconsin–Madison), S. Westerhoff(University of Wisconsin–Madison), I. G. Wisher(University of Wisconsin–Madison), J. Wood(University of Wisconsin–Madison), T. Yapici(Michigan State University), P. Younk(Los Alamos National Laboratory), A. Zepeda(Universidad Autónoma de Chiapas), H. Zhou(Los Alamos National Laboratory)
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Abstract
Abstract We present the first catalog of TeV gamma-ray sources realized with data from the newly completed High Altitude Water Cherenkov Observatory (HAWC). It is the most sensitive wide field-of-view TeV telescope currently in operation, with a one-year survey sensitivity of ∼5%–10% of the flux of the Crab Nebula. With an instantaneous field of view >1.5 sr and >90% duty cycle, it continuously surveys and monitors the sky for gamma-ray energies between hundreds of GeV and tens of TeV. HAWC is located in Mexico, at a latitude of 19° N, and was completed in 2015 March. Here, we present the 2HWC catalog, which is the result of the first source search performed with the complete HAWC detector. Realized with 507 days of data, it represents the most sensitive TeV survey to date for such a large fraction of the sky. A total of 39 sources were detected, with an expected number of false detections of 0.5 due to background fluctuation. Out of these sources, 19 are new sources that are not associated with previously known TeV sources (association criteria: <0.°5 away). The source list, including the position measurement, spectrum measurement, and uncertainties, is reported, then each source is briefly discussed. Of the 2HWC associated sources, 10 are reported in TeVCat as PWN or SNR: 2 as blazars and the remaining eight as unidentified.
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