XRBs ivo://nasa.heasarc/xrbcat NASA/GSFC HEASARC van Paradijs; White 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star XRB XRBCAT is a catalog of X-ray binaries, based on the van Paradijs (1996) compilation, and updated by Nick White to include all the new (mostly transient) systems discovered since then up until the last update (see below). The information in XRBCAT is basic and does not attempt to be complete. It includes the name of the source, the position, the pulse or orbital period (if one is known), the object class, a flux (a maximum and, if available, a minimum), and an optical V magnitude (if available). To reference XRBCAT, please use the following acknowledgment: "This paper utilized the HEASARC XRBCAT X-ray Binary catalog". Since it is a very time consuming task to keep track of all the new sources and discoveries, there may be incomplete or missing sources. This catalog was last updated on April 22, 1998. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/xrbcat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xrbcat& GET text/xml 180 99999 true 263.995554874543 -27.4394255373566 1 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xrbcat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xrbcat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 1 X-ray public xrbcat X-Ray Binaries Catalog name Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable porb Orbital Period (days) d time.period float nullable pulse_per Pulse Period (secs) s src.var.pulse float nullable vmax V Magnitude Maximum phot.mag;em.opt.V;stat.max float nullable fxmax Flux Maximum (microJy) microJy phot.flux;stat.max 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 lii Galactic Longitude degree pos.galactic.lon double nullable bv_color B-V Color phot.color;em.opt.B;em.opt.V float nullable bii Galactic Latitude degree pos.galactic.lat double nullable ub_color U-B Color phot.color;em.opt.U;em.opt.B float nullable fxmin Flux Minimum microJy phot.flux;stat.min float nullable flag Flag for Flux Bounded meta.code;phot.flux char nullable class Browse Object Classification src.class short nullable vmin V Magnitude Minimum phot.mag;em.opt.V;stat.min float nullable mii Galactic Longitude in +/-180 degree pos.galactic.lon double nullable