OStars ivo://nasa.heasarc/ostars NASA/GSFC HEASARC Garmany, Conti, Chiosi; HEASARC 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star This database table is based upon the information contained in the Catalog of Galactic O-Type Stars (Garmany, Conti, and Chiosi 1982), which is a compilation from the literature of all O-type stars for which spectral types, luminosity classes, and UBV photometry exist. Most of the entries come from Cruz-Gonzalez, et al. (1974) and Humphreys (1978), with additional stars from Garrison and Kormendy (1976); Garrison, Hiltner, and Schild (1977); Garrison and Schild (1979); Feinstein, Marraco, and Muzzio (1973); Feinstein, Marraco, and Forte (1976); and Moffat, Fitzgerald, and Jackson (1979). As discussed below, the HEASARC has deleted 5 of the original 765 entries which we believe to be erroneous and/or redundant, and modified the names and/or positions of 14 other entries. As part of the checking process, the HEASARC created new, more accurate positions for all the entries using the SIMBAD database. The catalog contains 760 stars, for each of which designations (HD, DM, etc.), spectral types, V magnitudes, B-V magnitudes, cluster memberships, positional information, and source references are given. In addition, the authors have included derived values of absolute visual and bolometric magnitudes, and distances. The source reference should be consulted for additional details concerning the derived quantities. This is a service provided by NASA HEASARC . 1982ApJ...263..777G https://heasarc.gsfc.nasa.gov/W3Browse/all/ostars.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ostars& GET text/xml 180 99999 true 202.5980044 -78.8557072 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ostars GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ostars&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0833333333333333 Optical public ostars Galactic O Stars Catalog dec Declination from SIMBAD degree pos.eq.dec;meta.main double nullable lii Galactic Longitude, Based on SIMBAD Position degree pos.galactic.lon double nullable name SIMBAD-Compatible Source Designation meta.id;meta.main char nullable abs_vmag Absolute Visual Magnitude mag phys.magAbs;em.opt.V double nullable flags Flags (4) for Additional Information meta.code char nullable cluster_code Code for Cluster or Association meta.code.member short nullable abs_bolmag Absolute Bolometric Magnitude mag phys.magAbs.bol double nullable class Browse Object Classification src.class short nullable alt_name Source Designation from Original Catalog meta.id char nullable "distance" Distance Computed from the Distance Modulus of the Star (kiloparsecs) kpc pos.distance double nullable "__y_ra_dec" System unit vector column double nullable spect_type Spectral Type src.spType char nullable "__x_ra_dec" System unit vector column double nullable position_offset Position Offset between SIMBAD Position and Original Catalog Position (arcmin) arcmin double nullable "__z_ra_dec" System unit vector column double nullable vmag Photographic Magnitude mag phot.mag;em.opt.V double nullable bv_color B-V Magnitude mag phot.color;em.opt.B;em.opt.V double nullable ra_old J2000 Right Ascension, Based on Galactic Position from Original Catalog pos.eq.ra char nullable dec_old J2000 Declination, Based on Galactic Position from Original Catalog pos.eq.dec char nullable "__row" System index column char nullable ra Right Ascension from SIMBAD degree pos.eq.ra;meta.main double nullable bii Galactic Latitude, Based on SIMBAD Position degree pos.galactic.lat double nullable spect_type_flag Flag Indicates New Spectral Type meta.code;src.spType char nullable