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Title: The 2HWC HAWC Observatory Gamma-Ray Catalog

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. Ofmore » the 2HWC associated sources, 10 are reported in TeVCat as PWN or SNR: 2 as blazars and the remaining eight as unidentified.« less

Authors:
;  [1];  [2]; ; ;  [3]; ; ;  [4]; ;  [5]; ;  [6]; ;  [7];  [8];  [9];  [10];  [11];  [12] more »; « less
  1. Department of Physics and Astronomy, University of Utah, Salt Lake City, UT (United States)
  2. Physics Division, Los Alamos National Laboratory, Los Alamos, NM (United States)
  3. Instituto de Física, Universidad Nacional Autónoma de México, Mexico City (Mexico)
  4. Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas (Mexico)
  5. Universidad Michoacana de San Nicolás de Hidalgo, Morelia (Mexico)
  6. Department of Physics, Michigan Technological University, Houghton, MI (United States)
  7. Department of Physics, University of Maryland, College Park, MD (United States)
  8. Universidad Politecnica de Pachuca, Pachuca, Hidalgo (Mexico)
  9. NASA Goddard Space Flight Center, Greenbelt, MD (United States)
  10. Department of Physics and Astronomy, University of Rochester, Rochester, NY (United States)
  11. Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City (Mexico)
  12. Department of Physics, University of Wisconsin-Madison, Madison, WI (United States)
Publication Date:
OSTI Identifier:
22663445
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 843; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATALOGS; CHERENKOV COUNTING; COSMIC GAMMA SOURCES; CRAB NEBULA; DETECTION; FLUCTUATIONS; GAMMA RADIATION; GAMMA SOURCES; GEV RANGE; OPERATION; SENSITIVITY; SPECTRA; TELESCOPES; TEV RANGE; WATER

Citation Formats

Abeysekara, A. U., Barber, A. S., Albert, A., Alfaro, R., Becerril, A., Belmont-Moreno, E., Alvarez, C., Arceo, R., Caballero-Mora, K. S., Álvarez, J. D., Arteaga-Velázquez, J. C., Solares, H. A. Ayala, Brisbois, C., Baughman, B., Berley, D., Bautista-Elivar, N., Gonzalez, J. Becerra, BenZvi, S. Y., Bernal, A., Braun, J., E-mail: riviere@umdgrb.umd.edu, and and others. The 2HWC HAWC Observatory Gamma-Ray Catalog. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA7556.
Abeysekara, A. U., Barber, A. S., Albert, A., Alfaro, R., Becerril, A., Belmont-Moreno, E., Alvarez, C., Arceo, R., Caballero-Mora, K. S., Álvarez, J. D., Arteaga-Velázquez, J. C., Solares, H. A. Ayala, Brisbois, C., Baughman, B., Berley, D., Bautista-Elivar, N., Gonzalez, J. Becerra, BenZvi, S. Y., Bernal, A., Braun, J., E-mail: riviere@umdgrb.umd.edu, & and others. The 2HWC HAWC Observatory Gamma-Ray Catalog. United States. doi:10.3847/1538-4357/AA7556.
Abeysekara, A. U., Barber, A. S., Albert, A., Alfaro, R., Becerril, A., Belmont-Moreno, E., Alvarez, C., Arceo, R., Caballero-Mora, K. S., Álvarez, J. D., Arteaga-Velázquez, J. C., Solares, H. A. Ayala, Brisbois, C., Baughman, B., Berley, D., Bautista-Elivar, N., Gonzalez, J. Becerra, BenZvi, S. Y., Bernal, A., Braun, J., E-mail: riviere@umdgrb.umd.edu, and and others. Sat . "The 2HWC HAWC Observatory Gamma-Ray Catalog". United States. doi:10.3847/1538-4357/AA7556.
@article{osti_22663445,
title = {The 2HWC HAWC Observatory Gamma-Ray Catalog},
author = {Abeysekara, A. U. and Barber, A. S. and Albert, A. and Alfaro, R. and Becerril, A. and Belmont-Moreno, E. and Alvarez, C. and Arceo, R. and Caballero-Mora, K. S. and Álvarez, J. D. and Arteaga-Velázquez, J. C. and Solares, H. A. Ayala and Brisbois, C. and Baughman, B. and Berley, D. and Bautista-Elivar, N. and Gonzalez, J. Becerra and BenZvi, S. Y. and Bernal, A. and Braun, J., E-mail: riviere@umdgrb.umd.edu and and others},
abstractNote = {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.},
doi = {10.3847/1538-4357/AA7556},
journal = {Astrophysical Journal},
number = 1,
volume = 843,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}