Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/external/hienergy/E9004/

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://www.xray.mpe.mpg.de/cgi-bin/rosat/rosat-survey.
or
http://heasarc.gsfc.nasa.gov/docs/rosat/rass.html.

The following is an abbreviated "ReadMe" document that describes this external data set.
E/IX/4   ROSAT All-Sky Survey (RASS3)                             (ROSAT 2000)
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ROSAT All-Sky Survey (RASS3)
    ROSAT Science Data Center at MPE
    <ROSAT News 70, 22-Mar-2000 (2000)>
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ADC_Keywords: Surveys; X-ray sources; External catalog 
Mission Name: ROSAT

Location: http://www.xray.mpe.mpg.de/cgi-bin/rosat/rosat-survey or
           http://heasarc.gsfc.nasa.gov/docs/rosat/rass.html
   
See also:
    IX/10A : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
    IX/29  : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000) 

Description:
   The ROSAT All-Sky X-ray Survey was obtained during 1990/1991 using the
   ROSAT Position Sensitive Proportional Counter (PSPC) in combination with
   the ROSAT X-ray Telescope (XRT). The survey data were reprocessed at the
   Max-Planck-Institut fuer extraterrestrische Physik and were released to
   the public in March 2000.

   There are 1378 RASS3 fields each 6.4 deg*6.4 deg covering the whole sky.
   Neighboring fields are overlapping by at least 0.23 degrees. Each field
   can be identified by an equatorial latitude zone number (running from 1
   to 33) and an equatorial longitude segment number (running from 1 to 64, 
   depending on the zone number). 
   Accordingly there are 1378 directories in the ROSAT Data Archive each 
   containing a README file and 10 standard FITS files. The names of the 
   data directories have been adapted to match other ROSAT archival data.
   A 6-digit number (ROR number) is followed by 'p' for the detector used 
   (PSPC). The ROR number consists of '93' as the first two digits ('9' for 
   the ROR category 'other and survey data','3' stands for RASS3), digits 
   3 and 4 correspond to the zone number, 5 and 6 to the segment number.
   RASS FITS data files start with the 2 characters "rs" to indicate survey 
   data.

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(End)                       N. Odegard [SSDOO/ADC]                   09-Nov-2000
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