2007ApJS..171...61Healey+
    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.