LMXB ivo://nasa.heasarc/lmxbcat NASA/GSFC HEASARC Liu, van Paradijs, van den Heuvel 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star XRB This is the Fourth Edition of the Catalog of Low-mass X-ray Binaries (LMXBs) in the Galaxy and the Magellanic Clouds. The catalog has a companion catalog of high-mass X-ray binaries (HMXBs) which is called HMXBCAT in the HEASARC database system). The catalog contains source name(s), coordinates, X-ray flux, system parameters, and stellar parameters of the components and other characteristic properties of 187 low-mass X-ray binaries, together with references to a comprehensive selection of the relevant literature. The aim of this catalog is to provide some basic information on the X-ray sources and their counterparts in other wavelength ranges (gamma-rays, UV, optical, IR, and radio). Some sources, however, are only tentatively identified as low-mass X-ray binaries on the basis of their X-ray properties being similar to the known low-mass X-ray binaries. Further identification in other wavelength bands is needed to finally determine the nature of these sources. In cases where there is some doubt about the low-mass nature of the X-ray binary, this is mentioned. Literature published before 1 October 2006 has, as far as possible, been taken into account. This online catalog was created by the HEASARC in September 2007 based on machine-readable tables obtained from the ADC/CDS data centers (their catalog J/A+A/469/807, tables lmxb.dat and lmxbnote.dat). This is a service provided by NASA HEASARC . 2007A&A...469..807L https://heasarc.gsfc.nasa.gov/W3Browse/all/lmxbcat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=lmxbcat& GET text/xml 180 99999 true 240.975 -77.885 0.5 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=lmxbcat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_lmxbcat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.5 Optical X-ray public lmxbcat Low-Mass X-Ray Binary Catalog (4th Edition, 2007) pulse_period Pulse Period for X-Ray Pulses (seconds) s time.period double nullable vmag V Magnitude mag phot.mag;em.opt.V double nullable reddening Interstellar Reddening E(B-V) mag phot.color.excess double nullable vmag_min Minimum V Magnitude If Interval mag phot.mag;em.opt.V;stat.min double nullable name X-Ray Source Designation meta.id;meta.main char nullable position_type Type of Observation Used to Derive Position meta.code;pos char nullable ref_periods Reference for Orbital and/or Pulse Period meta.bib;time.period char nullable porb Orbital Period (days) d time.period double nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable "__x_ra_dec" System unit vector column double nullable porb_flag Uncertainty Flag for Orbital Period meta.code;time.period char nullable "__y_ra_dec" System unit vector column double nullable alt_name_2 Alternative Designation #2 meta.id char nullable bii Galactic Latitude degree pos.galactic.lat double nullable flux_limit Limit Flag on X-Ray Flux Density meta.code;phot.flux.density;em.X-ray char nullable "__z_ra_dec" System unit vector column double nullable flux_max Upper Value of X-Ray Flux when interval microJy phot.flux.density;em.X-ray;stat.max int nullable reddening_max Maximum Reddening If Interval mag phot.color.excess;stat.max double nullable ref_optical_name Reference for Optical Counterpart (Finding Charts) meta.bib char nullable optical_name Optical Counterpart meta.id.assoc;em.opt char nullable dec Declination degree pos.eq.dec;meta.main double nullable lmxb_notes Notes Concerning X-Ray Source meta.note char nullable "__row" System index column char nullable bv_color_flag B-V Color Index Uncertainty Flag meta.code;phot.color char nullable flux_range Energy Range for X-Ray Flux (if not 2-10 keV) instr.bandwidth char nullable ref_flux Reference for X-Ray Flux meta.bib;phot.flux.density char nullable class Browse Object Classification src.class short nullable lii Galactic Longitude degree pos.galactic.lon double nullable ref_photometry Reference for UBV Photometry meta.bib;phot char nullable bv_color B-V Color Index mag phot.color;em.opt.B;em.opt.V double nullable xray_type X-Ray Type [ABDEGMPRTUZ] src.class char nullable flux Maximum X-Ray Flux Density in 2-10keV (unless otherwise indicated in flux_range) microJy phot.flux.density;em.X-ray double nullable alt_name_1 Alternative Designation #1 meta.id char nullable reddening_limit Limit Flag on Interstellar Reddening meta.code;phot.color.excess char nullable ub_color U-B Color Index mag phot.color;em.opt.U;em.opt.B double nullable reddening_flag Uncertainty Flag for Interstellar Reddening meta.code;phot.color.excess char nullable