CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates

By S. E. Healey, R. Romani, G. Cotter, P. Michelson, Edward F. Schlafly, A. Readhead, P. Giommi, S. Chaty, I. Grenier, L. Weintraub. 2007

229 citations recorded by the source corpus.

We describe a uniform all-sky survey of bright blazars, selected primarily by their flat radio spectra, that is designed to provide a large catalog of likely γ-ray active galactic nuclei (AGNs). The defined sample has 1625 targets with radio and X-ray properties similar to those of the EGRET blazars, spread uniformly across the |b| > 10° sky. We also report progress toward optical characterization of the sample; of objects with known R < 23, 85% have been classified and 81% have measured redshifts. One goal of this program is to focus attention on the most interesting (e.g., high-redshift, high-luminosity,…) sources for intensive multiwavelength study during the observations by the Large Area Telescope (LAT) on GLAST.

Subfields: Instrumentation, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/09874be111fe3966270092cf0b545aa2853fd2b9

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Citations in the corpus

FERMI/LARGE AREA TELESCOPE DISCOVERY OF GAMMA-RAY EMISSION FROM A RELATIVISTIC JET IN THE NARROW-LINE QUASAR PMN J0948+0022 (2009, methodology): “…from 4 September 2007 at 16:25 UTC to 11 February 2009 06:53 UTC (MJD 54347.68-54873.29) at 15 GHz by the Owens Valley Radio Observatory (OVRO) 40 m telescope as part of an ongoing Fermi blazar monitoring program of all 1159 CGRaBS blazars north of declination −20 degrees (Healey et al. 2008).”
THE LUMINOSITY FUNCTION OF FERMI-DETECTED FLAT-SPECTRUM RADIO QUASARS (2011, background): “…these catalogs, the most important ones are the Combined Radio All-sky Targeted Eight GHz Survey (CRATES; Healey et al. 2007), the Candidate Gamma-Ray Blazar Survey (CGRaBS; Healey et al. 2008), and the Roma-BZCAT (Massaro et al. 2009), which is a catalog of blazars identiﬁed at all frequencies.”
SPECTROSCOPY OF BROAD-LINE BLAZARS FROM 1LAC (2012, methodology): “For this paper we adopt the traditional heuristic BL Lac definition: continuum-dominated objects with observed frame line equivalent width (EW) of < 5 Å and, where measured, Balmer break strength of < 0.5 (Healey et al. 2008).”
THE FIRST CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE (2010, background): “The most important ones are the Combined Radio Allsky Targeted Eight GHz Survey (CRATES; Healey et al. 2007), the Candidate Gamma-Ray Blazar Survey (CGRaBS; Healey et al. 2008), and the Roma-BZCAT (Massaro et al. 2009).”
Fermi Large Area Telescope Fourth Source Catalog (2019, unknown): “…Chang et al. (2017) WISE blazar catalog 12319 D’Abrusco et al. (2014) Radio Fundamental Catalog (2019a) 15740 http://astrogeo.org/rfc CGRaBS 1625 Healey et al. (2008) CRATES 11499 Healey et al. (2007) ATCA 20 GHz southern sky survey 5890 Murphy et al. (2010) 105 month Swift/BAT catalog 1632 Oh…”
Roma-BZCAT: A multifrequency catalogue of Blazars (2008, background): “…al. (2002b), (22) Sowards-Emmerd et al. (2005), (23) Londish et al. (2002), (24) Londish et al. (2007), (25) Collinge et al. (2005), (26) Turriziani et al. (2007), (27) Healey et al. (2008), (28) Plotkin et al. (2008). in most cases and are often derived from catalogues, sometimes making it very…”
BLAZARS IN THE FERMI ERA: THE OVRO 40 m TELESCOPE MONITORING PROGRAM (2010, background): “The compilation of the CGRaBS sample (Healey et al. 2008), for example, was based on radio flux density, radio spectral index, and X-ray flux; variability information was not included, not because it was not considered important, but rather because such information was, at the time, unavailable.”
DETECTION OF GAMMA-RAY EMISSION FROM THE STARBURST GALAXIES M82 AND NGC 253 WITH THE LARGE AREA TELESCOPE ON FERMI (2009, methodology): “We considered alternative associations for the two LAT sources of interest aside from M82 and NGC 253 in the CRATES catalog of flat-spectrum radio sources (14,467 entries; Healey et al. 2007) and the Candidate Gamma-Ray Blazar Survey catalog, CGRaBS (1625 entries, Healey et al. 2008).”
SPECTROSCOPY OF THE LARGEST EVER γ-RAY-SELECTED BL LAC SAMPLE (2013, background): “…of the BLL label follows a pragmatic “optical spectroscopic” definition (Marcha et al. 1996): these are blazars with no emission lines greater than 5 Å observed equivalent width, and a limit on any possible 4000 Å spectral break of < 40% (Marcha et al. 1996; Healey et al. 2008; Shaw et al. 2009).”
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG (2010, background): “Our association procedure contains 4 catalogs to cover the blazar source class (BZCAT, CGRaBS, CRATES, BL Lac) and these catalogs have a substantial number of objects in common.”
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG (2010, background): “Our association procedure contains 4 catalogs to cover the blazar source class (BZCAT, CGRaBS, CRATES, BL Lac) and these catalogs have a substantial number of objects in common.”
BRIGHT ACTIVE GALACTIC NUCLEI SOURCE LIST FROM THE FIRST THREE MONTHS OF THE FERMI LARGE AREA TELESCOPE ALL-SKY SURVEY (2009, background): “For504 instance, 0FGL J00174−0503 is a FSRQ at z = 0.227 (Healey et al. 2008) with index = 2.71 and505 radio luminosity Lr = 10 42.36 erg s−1, which could then be a rare case of low-energy peak and low506 radio luminosity blazar.”
SEARCHING FOR DARK MATTER ANNIHILATION IN RECENTLY DISCOVERED MILKY WAY SATELLITES WITH FERMI-LAT (2016, background): “We also investigated associations with sources observed at other wavelengths that are potential γ-ray emitters in the BZCAT (Massaro et al. 2009), CRATES (Healey et al. 2007), CGraBS (Healey et al. 2008), PMN (Wright et al. 1994), and WISE blazar candidate (D’Abrusco et al. 2014) catalogs.”