GOSCAT ivo://nasa.heasarc/goscat NASA/GSFC HEASARC Maiz-Apellaniz et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors have produced a catalog of 378 Galactic O stars (the GOS Catalog) with accurate spectral classifications that is complete for V < 8 but includes many fainter stars. The catalog provides cross-identifications with other sources; coordinates (obtained in most cases from Tycho-2 data); astrometric distances for 24 of the nearest stars; optical (Tycho-2, Johnson, and Stroemgren) and NIR photometry; group membership, runaway character, and multiplicity information. There is also a web-based version of this catalog with links to online services at <a href="http://www-int.stsci.edu/~jmaiz/research/GOS/GOSmain.html">http://www-int.stsci.edu/~jmaiz/research/GOS/GOSmain.html</a> This table was created by the HEASARC in February 2009 based on the electronic versions of Tables 1, 2, 5, 6, 8, 9, 10, 11, 12 and 13 obtained from the CDS, namely their catalog V/116 (files main.dat, posplx.dat, tyc2mmag.dat, ubvmag.dat and dist.dat). This is a service provided by NASA HEASARC . 2004ApJS..151..103M https://heasarc.gsfc.nasa.gov/W3Browse/all/goscat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=goscat& GET text/xml 180 99999 true 202.59799583 -78.85571389 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=goscat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_goscat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0166666666666667 Infrared Optical public goscat Galactic O Stars with Accurate Spectral Classes Catalog name Common Source Designation meta.id;meta.main char nullable hd_number HD number meta.id int nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable vmag Johnson V-Band Magnitude mag phot.mag;em.opt.V double nullable vmag_error 1-Sigma Uncertainty in V Magnitude mag stat.error;phot.mag;em.opt.V double nullable jmag 2MASS J-Band Magnitude mag phot.mag;em.IR.J double nullable jmag_error 1-Sigma Uncertainty in J Magnitude mag stat.error;phot.mag;em.IR.J double nullable spect_type Spectral Class (Temperature and Luminosity) src.spType 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 by_color Stromgren (b-y) Color mag phot.color;em.opt double nullable hd_component HD Component Identification meta.code.multip char nullable supplement_flag Flag [S] Indicates Supplement Stars meta.code char nullable kmag_error 1-Sigma Uncertainty in K Magnitude mag stat.error;phot.mag;em.IR.K double nullable by_color_error 1-Sigma Uncertainty in b-y Color mag stat.error;phot.color;em.opt double nullable lii Galactic Longitude degree pos.galactic.lon double nullable tycho2_name Tycho-2 Catalog Designation meta.id.cross char nullable gos_name Catalog Source Designation meta.id char nullable num_astrometric_cpt Number of Astrometric Components meta.number short nullable hmag 2MASS H-Band Magnitude mag phot.mag;em.IR.H double nullable vt_mag Tycho-2 V-Band Magnitude mag phot.mag;em.opt.V double nullable bv_color_error 1-Sigma Uncertainty in B-V Color mag stat.error;phot.color;em.opt.B;em.opt.V double nullable bt_mag_error 1-Sigma Uncertainty in BT Magnitude mag stat.error;phot.mag;em.opt.B double nullable alt_name Alternative Source Designation meta.id char nullable gos_gos_offset_limit Limit Flag for Distance to Nearest GOS Catalog Star meta.code;pos.angDistance;em.opt char nullable hmag_error 1-Sigma Uncertainty in H Magnitude mag stat.error;phot.mag;em.IR.H double nullable c1_index_error 1-Sigma Uncertainty in c1 Index mag stat.error;arith;phot.mag;em.opt double nullable gos_near_cpt_offset Distance to Nearest Astrometric Component arcsec pos.angDistance double nullable ref_position Code Indicates Reference for Position meta.ref;pos.eq char nullable ref_codes Codes Indicate References meta.ref char nullable m1_index Stromgren m_1_ Index mag arith;phot.mag;em.opt double nullable spect_type_qualifier Qualifier for Spectral Class meta.code;src.spType char nullable ref_spect_type Code Indicates Reference for Spectral Class meta.ref;src.spType char nullable vt_mag_error 1-Sigma Uncertainty in VT Magnitude mag stat.error;phot.mag;em.opt.V double nullable m1_index_error 1-Sigma Uncertainty in m1 Index mag stat.error;arith;phot.mag;em.opt double nullable source_flag Flag [CMNW] Indicates Discrepancy meta.code char nullable runaway_flag Flag Indicates Runaway Character meta.code char nullable bt_mag Tycho-2 B-Band Magnitude mag phot.mag;em.opt.B double nullable ub_color Johnson (U-B) Color mag phot.color;em.opt.U;em.opt.B double nullable wds_name Washington Double Star Catalog Identification meta.id.cross char nullable hip_parallax Hipparcos Parallax mas pos.parallax.trig double nullable bii Galactic Latitude degree pos.galactic.lat double nullable hip_parallax_error 1-Sigma Uncertainty in Hipparcos Parallax mas stat.error;pos.parallax.trig double nullable binary_status Binary Status meta.code.multip char nullable gos_tyc_offset Distance to Nearest Tycho Catalog Star arcsec pos.angDistance;em.opt double nullable kmag 2MASS K_s_-Band Magnitude mag phot.mag;em.IR.K double nullable ref_spect_type_table Reference Table Where Spectral Class Was Obtained meta.code short nullable gos_far_cpt_offset Distance to Furthest Astrometric Component arcsec pos.angDistance double nullable gos_tyc_offset_limit Limit Flag for Distance to Nearest Tycho Catalog Star meta.code;pos.angDistance;em.opt char nullable ub_color_error 1-Sigma Uncertainty in U-B Color mag stat.error;phot.color;em.opt.U;em.opt.B double nullable c1_index Stromgren c_1_ Index mag arith;phot.mag;em.opt double nullable group_membership Group Membership Information meta.id.cross char nullable gos_gos_offset Distance to Nearest GOS Catalog Star arcsec pos.angDistance;em.opt double nullable bv_color Johnson (B-V) Color mag phot.color;em.opt.B;em.opt.V double nullable class Browse Object Classification src.class short nullable sec_spect_type Secondary Component Detected in the Spectrum src.spType char nullable