HMXBCAT2 ivo://nasa.heasarc/hmxbcat2 NASA/GSFC HEASARC Fortin et al. 2026-04-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov XRB High-Mass X-ray Binaries (HMXBs) are a particular class of high-energy sources which require multi-wavelength observational efforts to be properly characterized. New identifications and refinement of previous measurements are regularly published in the literature by independent teams of researchers and could, once collected in a catalog, offer a tool to facilitate further studies on HMXBs. The authors aim to update on previous instances of catalogs of HMXBs in the Galaxy, and provide the community easy access to the most complete set of observables on Galactic HMXBs. On top of the fixed version that is available in VizieR, they also aim to host and maintain a dynamic version that can be updated upon request from users, and where any modification will be logged. Using previous catalogs of HMXBs supplemented by listings of hard X-ray sources detected in the past 20 years, the authors produce a base set of HMXBs and candidates by means of identifier and sky coordinate cross-matches. They query SIMBAD for unreferenced HMXBs. They search for as many hard X-ray, soft X-ray, optical and infrared counterparts to the HMXBs as we can in well-known catalogs and compile their coordinates. Each HMXB is subject to a meticulous search in the literature to find relevant measurements and their original reference. The authors provide a catalog of HMXBs in the Galaxy with their best known coordinates, companion star spectral type, systemic radial velocities, component masses, orbital period, eccentricity and spin period when available. This catalog also provides the coordinates and identifiers for each counterpart found from hard X-rays to near-infrared, including counterparts from the recent Gaia DR3 catalog. This catalog was created from data-mining the published literature. It takes into account information available through 2022. Values for binary parameters are joined with a reference in which the value was derived. Position data for which the authors have manually found a counterpart also have a specific reference; if not, then the data comes directly from the corresponding catalog. This database table was first created by the HEASARC in October 2023, based on the 2023-09 version of this catalog, found from the <a href="https://binary-revolution.github.io/HMXBwebcat/">Binary rEvolution website</a>. It is automatically updated in the HEASARC database within a few days of a new version being released on that website. This is a service provided by NASA HEASARC . 2023A&A...671A.149F https://heasarc.gsfc.nasa.gov/W3Browse/all/hmxbcat2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=hmxbcat2& GET text/xml 180 99999 true 183.311568792902 -64.8751325230375 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=hmxbcat2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_hmxbcat2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0166666666666667 X-ray public hmxbcat2 Catalog of High-Mass X-Ray Binaries in the Galaxy (Dynamic Versi name Catalog 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 error_radius Positional Error arcsec stat.error;pos double nullable ref_position Reference for Position of Primary Source meta.ref;pos char nullable spect_type Companion Star Spectral Type src.spType char nullable source_type HMXB Classification src.class char nullable mass_compact_obj Mass of the Compact Object Solar_Mass phys.mass double nullable mass_compact_obj_error Error in Mass of the Compact Object Solar_Mass stat.error;phys.mass double nullable mass_companion Mass of the Companion Star Solar_Mass phys.mass double nullable mass_companion_error Error in Mass of the Companion Star Solar_Mass stat.error;phys.mass double nullable orbital_period Orbital Period d time.period double nullable orbital_period_error Error in Orbital Period d stat.error;time.period double nullable agile_ra AGILE Right Ascension degree pos.eq.ra double nullable uhuru4_dec Fourth Uhuru (4U) Declination degree pos.eq.dec double nullable ariel3_dec 3rd Ariel-V SSI Catalog Declination degree pos.eq.dec double nullable sax_error_radius BeppoSAX Positional Error arcsec stat.error;pos double nullable swift_ra Swift 2XSPS Right Ascension degree pos.eq.ra double nullable sax_dec BeppoSAX Declination degree pos.eq.dec double nullable xmm_ra 4XMM-DR11 Right Ascension degree pos.eq.ra double nullable swift_name Identifier in Swift 2XSPS Catalog meta.id.cross char nullable agile_dec AGILE Declination degree pos.eq.dec double nullable twomass_dec 2MASS Declination degree pos.eq.dec double nullable twomass_name Identifier in 2MASS Catalog meta.id.cross char nullable swift_dec Swift 2XSPS Declination degree pos.eq.dec double nullable sax_ra BeppoSAX Right Ascension degree pos.eq.ra double nullable var_swift Ratio of Peak to Mean Flux in Swift 2XSPS phot.flux;arith.ratio double nullable ref_eccentricity Reference for the Eccentricity meta.ref;src.orbital.eccentricity char nullable ref_swift_position Reference for Swift 2XSPS Position meta.ref;pos char nullable chandra_error_radius Chandra CSC2 Positional Error arcsec stat.error;pos double nullable uhuru4_name Identifier in Fourth Uhuru (4U) Catalog meta.id.cross char nullable xmm_error_radius 4XMM-DR11 Positional Error arcsec stat.error;pos double nullable eccentricity Eccentricity of the Orbit src.orbital.eccentricity double nullable agile_name Identifier in AGILE meta.id.cross char nullable igr_dec INTEGRAL Declination degree pos.eq.dec double nullable chandra_ra Chandra CSC2 Right Ascension degree pos.eq.ra double nullable chandra_name Identifier in Chandra CSC2 Catalog meta.id.cross char nullable ref_agile_position Reference for AGILE Position meta.ref;pos char nullable ref_spect_type Reference for Spectral Type meta.ref;src.spType char nullable rosat_name Identifier in ROSAT meta.id char nullable xmm_name Identifier in 4XMM-DR11 Catalog meta.id.cross char nullable eccentricity_error Error in the Eccentricity stat.error;src.orbital.eccentricity double nullable ref_sup_orbital_period Reference for Superorbital Period meta.ref;time.period.revolution char nullable swift_error_radius Swift 2XSPS Positional Error arcsec stat.error;pos double nullable radial_velocity_error Error in Radial Velocity km/s stat.error;spect.dopplerVeloc double nullable ref_chandra_position Reference for Chandra CSC2 Position meta.ref;pos char nullable ref_spin_period Reference for the Spin Period meta.ref char nullable twomass_ra 2MASS Right Ascension degree pos.eq.ra double nullable ref_orbital_period Reference for Orbital Period meta.ref;time.period.revolution char nullable agile_error_radius AGILE Positional Error arcsec stat.error;pos double nullable distance_neg_err Lower Bound of the Error on Distance pc stat.error;pos.distance double nullable bii Galactic Latitude degree pos.galactic.lat double nullable igr_error_radius INTEGRAL Positional Error arcsec stat.error;pos double nullable fermi_ra Fermi LAT Fourth AGN Catalog Right Ascension degree pos.eq.ra double nullable rosatf_dec RASS-FSC Declination degree pos.eq.dec double nullable chandra_dec Chandra CSC2 Declination degree pos.eq.dec double nullable e2e_ra Einstein 2E Right Ascension degree pos.eq.ra double nullable gaiadr3_error_radius Gaia DR3 Positional Error arcsec stat.error;pos double nullable e2e_dec Einstein 2E Declination degree pos.eq.dec double nullable ref_mass_compact_obj Reference for Mass of the Compact Object meta.ref;phys.mass char nullable uhuru4_error_radius Fourth Uhuru (4U) Positional Error arcsec stat.error;pos double nullable heao_dec HEAO-1 Declination degree pos.eq.dec double nullable heao_ra HEAO-1 Right Ascension degree pos.eq.ra double nullable fermi_error_radius Fermi LAT Fourth AGN Catalog Positional Error arcsec stat.error;pos double nullable ariel3_error_radius 3rd Ariel-V SSI Catalog Positional Error arcsec stat.error;pos double nullable fermi_dec Fermi LAT Fourth AGN Catalog Declination degree pos.eq.dec double nullable var_xmm_flag Flag [YN] Indicates Variability in 4XMM DR11 meta.code;src.var char nullable distance_pos_err Upper Bound of the Error on Distance pc stat.error;pos.distance double nullable gaiadr3_dec Gaia DR3 Declination degree pos.eq.dec double nullable spin_period_error Error in the Spin Period s stat.error;time.period.rotation double nullable rosatf_name Identifier in ROSAT All-Sky Survey Faint Source Catalog (RASS-FSC) meta.id.cross char nullable rosat_error_radius ROSAT Positional Error arcsec stat.error;pos double nullable alt_name Alternative Catalog-Based Source Designation meta.id char nullable heao_error_radius HEAO-1 Positional Error arcsec stat.error;pos double nullable ref_sax_position Reference for BeppoSAX Position meta.ref;pos char nullable ariel3_name Identifier in 3rd Ariel-V SSI Catalog meta.id.cross char nullable eccentricity_limit Limit Flag for Eccentricity of the Orbit meta.code;src.orbital.eccentricity char nullable spin_period Spin Period of the Compact Object s time.period.rotation double nullable class Browse Object Classification src.class short nullable e2e_error_radius Einstein 2E Positional Error arcsec stat.error;pos double nullable rosatf_ra RASS-FSC Right Ascension degree pos.eq.ra double nullable radial_velocity Systemic Radial Velocity km/s spect.dopplerVeloc double nullable sax_name Identifier in BeppoSAX meta.id.cross char nullable var_igr_flag Variability Flag in the INTEGRAL Catalog (Bird et al., 2016, Cat. J/ApJS/223/15) meta.code;src.var char nullable igr_ra INTEGRAL Right Ascension degree pos.eq.ra double nullable rosat_ra ROSAT Right Ascension degree pos.eq.ra double nullable sup_orbital_period Superorbital Period d time.period.revolution double nullable ref_rosat_position Reference for ROSAT Position meta.ref;pos char nullable ariel3_ra 3rd Ariel-V SSI Catalog Right Ascension degree pos.eq.ra double nullable compact_object_type Classification of Compact Object src.class char nullable var_flag Overall Variability Flag [YN] meta.code;src.var char nullable uhuru4_ra Fourth Uhuru (4U) Right Ascension degree pos.eq.ra double nullable igr_name INTEGRAL Identifier meta.id.cross char nullable sup_orbital_period_error Error in the Superorbital Period d stat.error;time.period.revolution double nullable ref_gaiadr3_position Reference for Gaia DR3 Position meta.ref;pos char nullable lii Galactic Longitude degree pos.galactic.lon double nullable ref_radial_velocity Reference for Radial Velocity meta.ref;spect.dopplerVeloc char nullable e2e_name Einstein Observatory 2E Catalog of IPC X-Ray Source Identifier meta.id.cross char nullable "distance" Distance to the Source Inferred from Gaia EDR3 Parallax pc pos.distance double nullable xmm_dec 4XMM-DR11 Declination degree pos.eq.dec double nullable fermi_name Identifier in Fermi LAT Fourth AGN Catalog meta.id.cross char nullable gaiadr3_ra Gaia DR3 Right Ascension degree pos.eq.ra double nullable var_chandra_flag Flag [YN] Indicates Variability in Chandra meta.code;src.var char nullable twomass_error_radius 2MASS Positional Error arcsec stat.error;pos double nullable rosat_dec ROSAT Declination degree pos.eq.dec double nullable rosatf_error_radius RASS-FSC Positional Error arcsec stat.error;pos double nullable gaiadr3_name Identifier in Gaia DR3 meta.id.cross char nullable heao_name Identifier in HEAO-1 meta.id.cross char nullable ref_mass_companion Reference for Mass of the Companion Star meta.ref;phys.mass char 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