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ROSAT Point Source Catalogue (medium WGA, Feb. 1991 to Mar. 1994).

Contents

Table name: 	wga_med
Records: 	49,721
Version:        1994 November.
Spectral Band: 	X-ray	
Kind of Object:	Various.	
Mode:
PreView:
Coordinates: 	J2000

Reference

Fields

Name
Meaning
id
A unique source id for each detection. This is composed of: xxrornumber_region_id, where xx is either `rp' for US sequence or `wp' for German/UK sequence, region is either `out' for source detected in the outer region or `in' for source detected in the inner region, id is the source number detected in the field. `rornumber' is a sequence number described in the original `help' file (see above).
name
The source designation within this catalog. To distinguish these sources from those found in other searches of the ROSAT archive, the designation WGAJ1223-3751 is used. `WGA' stands for White, Giommi and Angelini, the authors of the catalog; it is followed by the source coordinate given as `Jhhmm-/+ddmm`.
r_a
The source right ascension in J2000.
dec
The source declination in J2000.
lii
The source galactic longitude.
bii
The source galactic latitude.
cnt_rate
The background subtracted source count rate in counts/sec., corrected for telescope vignetting and point spread function.
cnt_rate_err
The error of the count rate.
exposure
The exposure time of the field, given in seconds.
qflag
A quality flag. In general 1-4 is bad, 5-10 is good. 0 means the field has not been quality checked. For an ultra clean source use qflag >= 5.
snr
The signal to noise ratio of the source. The threshold was set at 2.
prob
The probability that the detection is a background fluctuation. The threshold was set to 1.0E-04.
field
Original field name as found in the event list.
offset
The Offset of the Target position in arcmin from the Image Center.
region
The region of the rosat image used (i =in or o=out).
oid_1
The name of the optical ID.
xid_1
The name of the pre-ROSAT X-ray ID.
rid_1
Name of radio ID.
irname
IRAS name.
vmag
The V Mag of any optical ID.
qv_mag
GSC Quasi-V MAG.
qb_mag
GSC Quasi-B MAG.

Contact Persons:

Any questions about, or problems with, the original WGA catalogue should be addressed to Nick White, Paolo Giommi and Lorella Angelini at `wgacat@athena.gsfc.nasa.gov`. Questions pertaining to the CADC implementation within STARCAT should be addressed to `cadc@dao.nrc.ca'.

References :