Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/external/hienergy/E9002/

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. ##############################################################################

IMPORTANT NOTICE:

In August 1999, this version was superseded by E9003. See:
http://adc.gsfc.nasa.gov/adc-cgi/cat.pl?/external/hienergy/E9003/ .

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The following is an abbreviated "ReadMe" document that describes this external data set.
Superseded  The First ROSAT High Resolution Imager Source Catalog  (Arida+ 1998)
================================================================================
The First 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)(1998)> 
===============================================================================
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 from public ROSAT 
   HRI observations. More than 2000 HRI observations were analyzed to obtain 
   over 5000 bright sources (signal-to-noise ratio > 4). The catalog consists 
   of all source parameters derived 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. Flags are divided into "SEQUENCE FLAGS" which describe an entire 
   data sequence, and "SOURCE FLAGS" which describe an individual source. The 
   HRI source flags are associated with the primary SASS parameters like count 
   rates, positions, etc., and with qualitative source characteristics. 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 of the entire field at a plate scale of 5"/pixel and of the inner 
   part of the field at 2"/pixel, 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.

   See also:
   Superseded by E9003 in August 1999:

   E9003 : The Second ROSAT High Resolution Imager Source Catalog  (Arida+ 1999)
   at URL http://adc.gsfc.nasa.gov/adc-cgi/cat.pl?/external/hienergy/E9003/


****SUPERSEDED****
================================================================================
(End)                     Gail L. Schneider      [ADC/SSDOO]       11-June-1998
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