UNVEILING THE NATURE OF UNIDENTIFIED gamma-RAY SOURCES. VI. gamma-RAY BLAZAR CANDIDATES IN THE WISH SURVEY AND THEIR RADIO PROPERTIES
Nori M, Giroletti M, Massaro F, D'Abrusco R, Paggi A, Tosti G, Funk S (2014)
Publication Status: Published
Publication Type: Journal article
Publication year: 2014
Journal
Publisher: American Astronomical Society
Book Volume: 212
DOI: 10.1088/0067-0049/212/1/3
Abstract
According to the Fermi Large Area Telescope Second Source Catalog (2FGL), about one-third of the gamma-ray sources listed have no assigned counterparts at lower energies. Many statistical methods have been developed to find proper counterparts for these sources. We explore the sky area covered at low radio frequency by the Westerbork in the Southern Hemisphere (WISH) survey to search for blazar-like associations among the unidentified gamma-ray sources (UGSs) listed in the 2FGL. Searching the WISH and NRAO Very Large Array Sky Survey radio surveys within the positional uncertainty regions of the 2FGL UGSs, we select as gamma-ray blazar candidates the radio sources characterized by flat radio spectra between 352 MHz and 1400 MHz. We propose new gamma-ray blazar associations for eight UGSs and we also discuss their spectral properties at low radio frequencies. We compare the radio flux density distribution of the low radio frequency gamma-ray blazar candidates with that of gamma-ray blazars associated with other methods. We find significant differences between these distributions. Finally, we discuss the results of this association method and its possible applicability to other regions of the sky and future radio surveys.
Authors with CRIS profile
Involved external institutions
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
Harvard University
United States (USA) (US)
Università degli Studi di Perugia
Italy (IT)
Italy (IT)
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
Harvard University
United States (USA) (US)
Università degli Studi di Perugia
Italy (IT)
How to cite
APA:
Nori, M., Giroletti, M., Massaro, F., D'Abrusco, R., Paggi, A., Tosti, G., & Funk, S. (2014). UNVEILING THE NATURE OF UNIDENTIFIED gamma-RAY SOURCES. VI. gamma-RAY BLAZAR CANDIDATES IN THE WISH SURVEY AND THEIR RADIO PROPERTIES. Astrophysical Journal Supplement Series, 212. https://doi.org/10.1088/0067-0049/212/1/3
MLA:
Nori, M., et al. "UNVEILING THE NATURE OF UNIDENTIFIED gamma-RAY SOURCES. VI. gamma-RAY BLAZAR CANDIDATES IN THE WISH SURVEY AND THEIR RADIO PROPERTIES." Astrophysical Journal Supplement Series 212 (2014).
BibTeX: Download