/ftp/cats/J/ApJS/175/./97



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J/ApJS/175/97  CGRaBS: survey of gamma-ray blazar candidates   (Healey+, 2008)
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	table2.dat
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Beginning of ReadMe : J/ApJS/175/97 CGRaBS: survey of gamma-ray blazar candidates (Healey+, 2008) ================================================================================ CGRaBS: an all-sky survey of gamma-ray blazar candidates. Healey S.E., Romani R.W., Cotter G., Michelson P.F., Schlafly E.F., Readhead A.C.S., Giommi P., Chaty S., Grenier I.A., Weintraub L.C. <Astrophys. J. Suppl. Ser., 175, 97-104 (2008)> =2008ApJS..175...97H ================================================================================ ADC_Keywords: Active gal. nuclei ; Radio sources ; Spectroscopy ; Gamma rays Keywords: BL Lacertae objects: general - galaxies: active - quasars: general - surveys Abstract: 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 gamma-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^|>10deg 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. Description: The sample selection contents over 11000 flat-spectrum radio sources with interferometric measurements at  1 and 8.4GHz from CRATES catalog (Healey et al., 2007, Cat. J/ApJS/171/61) and NVSS (Condon et al., 1998, Cat. VIII/65). To complete the process of optical identification, we have conducted our own imaging campaign, primarily at the 5m Hale Telescope at Palomar, the 3.6m New Technology Telescope (NTT) at La Silla, and the 2.7m Harlan J. Smith Telescope at McDonald. The great workhorse of our spectroscopic effort has been the 9.2m Hobby-Eberly Telescope (HET) at McDonald.