RASS/Soft ivo://nasa.heasarc/rasshgsoft NASA/GSFC HEASARC Thomas et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source A summary of spectroscopic identifications is presented for a complete sample of bright, soft, high galactic-latitude X-ray sources drawn from the ROSAT All-Sky Survey (RASS) which have PSPC count-rates CR>0.5cts/s, hardness ratios HR1<0, and galactic latitudes |b| > 20 degrees. Out of a total of 397 sources, 270 had previously catalogued counterparts, although most of these were not previously known as X-ray sources; of the remaining 127 sources neither X-ray nor optical properties were previously known. Of the whole sample of very soft X-ray sources 155 were also discovered by the Wide-Field-Camera on board ROSAT. Spectroscopic identifications are presented for 108 sources and other identifications for a further 18 sources; 1 source remains unidentified so far. In practically all cases a unique optical counterpart exists, facilitating identification. The largest source classes are AGN, magnetic cataclysmic variables, and hot white dwarfs This database was created by the HEASARC in April 1999 based on tables provided by the authors to CDS/ADC. This is a service provided by NASA HEASARC . 1998A&A...335..467T https://heasarc.gsfc.nasa.gov/W3Browse/all/rasshgsoft.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rasshgsoft& GET text/xml 180 99999 true 351.9592 -86.2197 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rasshgsoft GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rasshgsoft&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0333333333333333 X-ray public rasshgsoft ROSAT All-Sky Survey: Soft High Galactic-Latitude X-Ray Sources rxs 1RXS Designation char nullable name Name of Optical Counterpart meta.id;meta.main char nullable ra Right Ascension of X-ray Source degree pos.eq.ra;meta.main double nullable dec Declination of X-ray Source degree pos.eq.dec;meta.main double nullable count_rate RASS BSC PSPC Count Rate (cps) ct/s phot.count;em.X-ray float nullable count_rate_error RMS Uncertainty in Count Rate ct/s stat.error;phot.count;em.X-ray float nullable notes Notes References char nullable ra2000_optical RA(2000) of Optical Counterpart char nullable flag_redshift Uncertainty Flag for Redshift char nullable redshift Redshift, if Extragalactic src.redshift float nullable broad_class Optical Counterpart Broad Class char nullable bii Galactic Latitude degree pos.galactic.lat double nullable hardness_ratio Hardness Ratio phot.flux;arith.ratio;em.X-ray float nullable dec2000_optical Dec(2000) of Optical Counterpart char nullable offset_sigma Offset/90% Confidence Radius float nullable lii Galactic Longitude degree pos.galactic.lon double nullable source_type Optical Counterpart Type src.class char nullable class Browse Object Classification src.class short nullable vmag V Magnitude phot.mag;em.opt.V float nullable hardness_ratio_error RMS Uncertainty in Hardness Ratio stat.error;phot.flux;arith.ratio;em.X-ray float nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable off_set X-ray-Optical Offset in arcsec arcsec float nullable