ROSATSRC - ROSAT PSPC source catalog from REV0/1 public pointings
This catalog contains ROSAT point sources detected by the standard analysis
system SASS. The catalog is based on the public PSPC observations.
During the ROSAT workshop at MPE on October 26, 1994 Wolfgang Voges
announced on behalf of the ROSAT Consortium (MPE-Garching, GSFC/SAO-US,
and WFC-Consortium-UK) the public release of "THE FIRST ROSAT SOURCE
CATALOGUE OF POINTED OBSERVATIONS WITH THE PSPC". This catalogue
contains 50,408 sources from 2876 pointed observations. For each source
the following properties are provided: the observation number, the
ROSAT name, the position in equatorial and in galactic co-ordinates,
four positional errors (intrinsic, systematic, boresight, and total),
the source count-rate and its error, the background countrate,
exposure time, hardness-ratios HR1 and HR2 and their errors, extent
and likelihood of extent, likelihoods of the map-detect algorithm and
of the maximum-likelihood detection algorithm, flags to indicate in
which energy band and by what algorithm the source was detected, the
detection cell size, the off-axis radius, the distances to the nearest
rib and source (before and after removal of ambiguous sources), and a
source confusion flag (set if another source is within 2.1*FWHM of the
This catalogue contains observations which have been performed until
the end of May 1993 and which are in the public archive. A visual
inspection of all soft and hard images, and an automated screening
process on the original so called master source lists (MASOL), have
been used to remove confused sources and 124 observations with too
crowded regions and regions of high surface brightness diffuse
emission. The resulting 50,408 sources have a likelihood of at least
10, corresponding to a rate of accidental detections of about 1 percent.
This data base contains 80% of all PSPC observations. Since the
acceptance criteria were rather conservative a total number of about
70,000 X-ray sources detected during the pointed PSPC observation phase
can be expected.
ROSAT source name.
Alternate source name if given.
Source right ascension
Source galactic longitude
Source galactic lattitude
ROSAT observation sequence number
MASOL main running number
Positional accuracy: error radius of Maximum Likelihood algorithm (arcsec)
Positional accuracy: boresight error
Positional accuracy: systematic error
Positional accuracy: total error
Off-axis radius in arcmin
Source counts per second (vignetting corrected)
Error on countrate
Background counts/sec/square arcmin
Exposure time in seconds (vignetting corrected)
Hardness ratio 1. Defined as (B-A)/(B+A).
Error on hardness1.
Hardness ratio 2. Defined as (D-C)/(D+C).
Error on hardness2.
Extent size in arcsec.
Likelihood from maximum-likelihood method
Likelihood of M-Detect algorithm.
Distance to next rib or edge in arcsec
Distance to next source in arcsec before screening
Distance to next source in arcsec after screening
Source detection string. Each character describes the detection/non-detection
in each of the different energy bands in the following order:
detection flag in MDetect broad band
detection flag in LDetect broad band
detection flag in MDetect hard band
detection flag in LDetect hard band
detection flag in MDetect soft band
detection flag in LDetect soft band
detection flag (broad=b,....)
Detect cell size.
Vignetting correction factor.
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