Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/external/hienergy/E9003/

The ADC has expanded its resources in order to better serve our users, we have developed a new category called "external" to complement our catalogs and journal table directories. You can access the data set described here through the URL:
http://heasarc.gsfc.nasa.gov/docs/rosat/rra/roshri/roshri.html.

The following is an abbreviated "ReadMe" document that describes this external data set.
E/IX/3   The Second ROSAT High Resolution Imager Source Catalog  (Arida+ 1999)
================================================================================
The Second ROSAT Source Catalog of Pointed Observations with the High 
Resolution Imager (ROSHRI)
   Arida M., Boller T., Brunner H., Corcoran M., Dennerl K., Englhauser J., 
   Gruber R., Haberl F., Harris D., Hasinger G., Junkes N., Petre R.,
   Pietsch W., Priebe A., Pye J., Sembay S., Siebert J., Silverman J., 
   Supper R., Voges W., Vrtilek S., Wambsganss J., Watson M., Zimmermann U.  
  <The ROSAT Consortium (the Max-Planck-Institut fuer extraterrestrische 
  Physik, the Goddard Space Flight Center, the Smithsonian Astrophysical 
  Observatory, Leicester University, and the Astrophysikalisches Institut 
  Potsdam)(1999)> 
===============================================================================
ADC_Keywords: X-ray sources, External catalog
Mission_Name: ROSAT

Location: http://heasarc.gsfc.nasa.gov/docs/rosat/rra/roshri/roshri.html

Description:
   This catalog contains arcsecond positions and count rates of detected 
   sources from nearly 3,000 public ROSAT HRI observations, including more 
   than 7500 firm sources (signal-to-noise ratio > 4). The catalog consists 
   of all primary source parameters from the automated detection algorithm 
   employed by the Standard Analysis Software System (SASS). 

   In addition each observation has been quality checked, both by automatic 
   algorithms and by detailed visual inspection. The results of this quality 
   checking are contained as a set of logical-value flags for each principal 
   source parameter. If a source parameter is suspect, the associated flag is 
   set to "TRUE"; parameters with no obvious problems maintain the default, 
   "FALSE", value. 

   In addition to the catalog, data products for each screened observation are
   also available. These data products include the screened source lists, 
   FITS images, and ASCII files containing information about obvious real 
   sources not detected by the SASS detection algorithms. 

   The ROSAT High Resolution Imager Source Catalog will continue to be updated
   as new HRI observations are screened and become public.
================================================================================
(End)                     Gail L. Schneider [ADC/SSDOO]          25-August-1999
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