Journal
ASTROPHYSICAL JOURNAL
Volume 843, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/aa7556
Keywords
catalogs; gamma rays: general; surveys
Categories
Funding
- US National Science Foundation (NSF)
- US Department of Energy Office of High-Energy Physics
- Laboratory Directed Research and Development (LDRD) program of Los Alamos National Laboratory
- Consejo Nacional de Ciencia y Tecnologia (CONACyT), Mexico [271051, 232656, 260378, 179588, 239762, 254964, 271737, 258865, 243290, 132197]
- Laboratorio Nacional HAWC de rayos gamma
- L'OREAL Fellowship for Women in Science
- Red HAWC, Mexico
- DGAPA-UNAM [IG100317, IN111315, IN111716-3, IA102715, 109916, IA102917]
- VIEP-BUAP
- PIFI, PROFOCIE
- University of Wisconsin Alumni Research Foundation
- Institute of Geophysics, Planetary Physics, and Signatures at Los Alamos National Laboratory
- Polish Science Centre [DEC-2014/13/B/ST9/945]
- Coordinacion de la Investigacion Cientifica de la Universidad Michoacana
- Division Of Physics
- Direct For Mathematical & Physical Scien [1506145] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1308033, 1308127, 1606566] Funding Source: National Science Foundation
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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 similar to 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 degrees 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 degrees.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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