Hamburg/RASS Cat. of optical identifications (HRC) (Bade+, 1998)

Details Hamburg/RASS Cat. of optical identifications (HRC) (Bade+, 1998) Hamburg/RASS Cat. of optical identifications (HRC) (Bade+, 1998)

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ycat..41270145b&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/127/145. Originally published in: 1998A&AS..127..145B

Physics

X-Ray Sources, Galaxy Catalogs, Qsos, Cross Identifications

Scientific paper

The file rassid2.cat provides information on optical identifications to X-ray positions of the ROSAT All-Sky Survey (RASS). The file was created by correlating the Bright Source Catalogue of ROSAT (Voges et al., 1996, Cat. ) and the Hamburg/RASS Catalogue of Optical Identifications (HRC) (Bade et al., 1996, in prep.). In the current state (Version 2.0) the catalogue contains 4665 positions in the extragalactic northern sky. For each X-ray position optical information taken from HQS objective prism and direct Schmidt plates (Hagen et al., 1995A&AS..111..195H) is given and a finding chart derived from digitized direct plates as gzipped Postscript file is provided (sky.ps file). If possible, the most likely optical counterpart is marked in the catalogue and on the finding chart. For many of the newly processed HQS fields of Version 2.0 no direct Schmidt plates from the HQS exists. In these cases we put finding charts generated from the STScI Digitized Sky Survey on the ftp server, ftp.hs.uni-hamburg.de, pub/outgoing/rass-id. We remind the reader that the STScI Digitized Sky Survey and HQS prism plates have different epochs. This has to be taken into account for stellar identifications. Furthermore the spectral sensitivity of the STScI Digitized Sky Survey and the HQS prism plates is different. The finding chart for each X-ray position is stored as a gzipped Postscript file and they can be found in the directories d-10 to d+80 at ftp.hs.uni-hamburg.de, pub/outgoing/rass-id. These directories arrange the files into declination belts. Names of finding charts generated by the STScI Digitized Sky Survey begin with a 'p'.
(4 data files).

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