Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.sao.ru/cats/doc/CRATES.html Дата изменения: Thu Apr 10 09:32:57 2008 Дата индексирования: Mon Oct 1 21:27:21 2012 Кодировка: Поисковые слова: craters

The Astrophysical Journal Supplement Series, 171:61-71, 2007 July 2007. The American Astronomical Society. All rights reserved. Printed in U.S.A. *CRATES: An All-Sky Survey of Flat-Spectrum Radio Sources* Stephen E. Healey , 1 Roger W. Romani , 1 Gregory B. Taylor , 2 Elaine M. Sadler , 3 Roberto Ricci , 4 Tara Murphy , 3, 5 James S. Ulvestad , 6 and Joshua N. Winn 7 /Received 2006 December 19; accepted 2007 February 5/ *ABSTRACT* We have assembled an 8.4 GHz survey of bright, flat-spectrum (? > -0.5) radio sources with nearly uniform extragalactic (|/b/| > 10 &j0; ) coverage for sources brighter than /S/_4.8 GHz = 65 mJy. The catalog is assembled from existing observations (especially CLASS and the Wright et al. PMN-CA survey), augmented by reprocessing of archival VLA and ATCA data and by new observations to fill in coverage gaps. We refer to this program as CRATES, the Combined Radio All-Sky Targeted Eight GHz Survey. The resulting catalog provides precise positions, subarcsecond structures, and spectral indices for some 11,000 sources. We describe the morphology and spectral index distribution of the sample and comment on the survey's power to select several classes of interesting sources, especially high-energy blazars. Comparison of CRATES with other high-frequency surveys also provides unique opportunities for identification of high-power radio sources. /Subject headings:/ galaxies: active?quasars: general?surveys /Online material: /machine-readable tables 1 <#cfn1> Department of Physics/KIPAC, Stanford University, Stanford, CA 94305; sehealey@astro.stanford.edu , rwr@astro.stanford.edu . 2 <#cfn2> Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131. 3 <#cfn3> School of Physics, University of Sydney, NSW 2006, Australia. 4 <#cfn4> Australia Telescope National Facility, CSIRO, Epping, NSW 1710, Australia. 5 <#cfn5> School of Information Technologies, University of Sydney, NSW 2006, Australia. 6 <#cfn6> National Radio Astronomy Observatory, Socorro, NM 87801. 7 <#cfn7> Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.