Ritter/LMXB ivo://nasa.heasarc/ritterlmxb NASA/GSFC HEASARC Ritter, Kolb 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star XRB This HEASARC database table contains information on low-mass X-ray binaries (LMXBs) only, as taken from the Catalog of Cataclysmic Binaries, Low-Mass X-ray Binaries, and Related Objects (7th Edition, Release 7.21, March 2014) of Ritter & Kolb. The complete catalog lists coordinates, apparent magnitudes, orbital parameters, stellar parameters of the components, and other characteristic properties of 1166 cataclysmic binaries, 105 low-mass X-ray binaries, and 500 related objects with known or suspected orbital periods. The HEASARC has for simplicity split this catalog into three Browse database tables, one for each class of objects: the present table (RITTERLMXB) containing the low-mass X-ray binaries' data, a second one (<a href="/W3Browse/star-catalog/rittercv.html">RITTERCV</a>) containing cataclysmic binaries' data, and a third one (<a href="/W3Browse/star-catalog/rittercv.html">RITTERRBIN</a>) containing the related binaries' data. The literature published before 1 January 2014 has, as far as possible, been taken into account. Low-mass X-ray binaries are semi-detached binaries consisting of either a neutron star or a black hole primary, and a low-mass secondary which is filling its critical Roche lobe. This table was last updated by the HEASARC in April 2014 based on the lmxbdata.dat file from the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/B/cb">CDS Catalog B/cb</a>. This is a service provided by NASA HEASARC . 2003A&A...404..301R https://heasarc.gsfc.nasa.gov/W3Browse/all/ritterlmxb.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ritterlmxb& GET text/xml 180 99999 true 6.00375 -72.08138889 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ritterlmxb GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ritterlmxb&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0833333333333333 Optical public ritterlmxb Ritter Low-Mass X-Ray Binaries Catalog (7.21 Edition) eclipse Flag Indicates Occurrence of Eclipses char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable mag4_flag Flag Indicates Uncertainty or Band for Mag4 [:R] char nullable period2_flag Uncertainty Flag for Second Period char nullable class Browse Object Classification src.class short nullable m1_flag Flag Indicates Uncertainty in Primary Mass M1 char nullable period3 Additional Period in the System (s) s double nullable mass_ratio_flag Uncertainty Flag for Mass Ratio char nullable m2 Secondary Mass M2 (Solar masses) Solar_Mass double nullable lim_mag4 Limit Flag for Mag4 char nullable orbital_period_flag Uncertainty Flag for Orbital Period char nullable type3 Object Type 3 char nullable spect_type_2 Spectral Type of the Secondary char nullable "__z_ra_dec" System unit vector column double nullable lx_lopt Ratio of X-Ray to Optical Luminosity double nullable name Object Designation meta.id;meta.main char nullable type1 Object Type 1 char nullable bii Galactic Latitude degree pos.galactic.lat double nullable type2_flag Uncertainty Flag for Object Type 2 char nullable sb Flag Specifying the Type of Spectroscopic Binary [12] short nullable mag1 Apparent V (or B/g/R/I/K) Magnitude at Maximum Brightness or Quiescence for XT mag double nullable mass_ratio_error Error of Mass Ratio double nullable lim_m2 Limit Flag for Secondary Mass M2 char nullable period2 Second Period (d) d double nullable lim_mag1 Limit Flag for Mag1 char nullable m2_flag Flag Indicates Uncertainty in Secondary Mass M2 char nullable mag2_flag Flag Indicates Uncertainty or Band for Mag2 [:BRIJK] char nullable "__row" System index column char nullable orbital_period Orbital Period (d) d double nullable mag1_flag Flag Indicates Band for Mag1 [UBgrRIiJK] or Uncertainty [:] char nullable mag4 Apparent V (or Other) Magnitude at Super-Outburst mag double nullable "interval" Typical Time Interval Between Two Subsequent X-Ray Active States(for Subtype XT) d short nullable mag3 Apparent V (or Other) Magnitude at Outburst mag double nullable inclination_flag Flag Indicates Uncertainty in Inclination char nullable alt_name Common Alternative Name meta.id char nullable type4 Object Type 4 char nullable m1_error Error of Primary Mass M1 (Solar masses) Solar_Mass double nullable m1 Primary Mass M1 (Solar masses) Solar_Mass double nullable type2 Object Type 2 char nullable type3_flag Uncertainty Flag for Object Type 3 char nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable lim_inclination Limit Flag for the Orbital Inclination char nullable mag3_flag Flag Indicates Uncertainty or Band for Mag3 [:BRIg] char nullable acc_pos Position Accuracy (arcsec) arcsec char nullable lim_mass_ratio Limit Flag for Mass Ratio char nullable type4_flag Uncertainty Flag for Object Type 4 char nullable type1_flag Uncertainty Flag for Object Type 1 char nullable period4 Additional Period in the System (s) s double nullable m2_error Error of Secondary Mass M2 (Solar masses) Solar_Mass double nullable mass_ratio Primary/Secondary Mass Ratio (M1/M2) double nullable mag2 Apparent V (or B, R, I) Magnitude at Mid-Eclipse mag double nullable lim_lx_lopt Limit Flag for Ratio of X-Ray to Optical Luminosity char nullable period3_flag Uncertainty Flag for Third Period char nullable dec Declination degree pos.eq.dec;meta.main double nullable spect_type_1 Spectral Type of the Primary char nullable inclination Orbital Inclination (degrees) degree double nullable lim_m1 Limit Flag for Primary Mass M1 char nullable lim_mag2 Limit Flag for Mag2 char nullable inclination_error Error of Orbital Inclination (degrees) degree double nullable lii Galactic Longitude degree pos.galactic.lon double nullable