COLL69OID ivo://nasa.heasarc/coll69oid NASA/GSFC HEASARC Barrado et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains some of the results from the first paper of a series devoted to the Lambda Orionis star-forming region, Orion's Head, from the X-ray perspective. The final aim of this research is to provide a comprehensive view of this complex region, which includes several distinct associations and dark clouds. The authors aim to uncover the population of the central, young star cluster Collinder 69, and in particular to find those diskless Class III pre-main sequence objects which have not been identified by previous surveys based on near- and mid-infrared searches, and to establish the X-ray luminosity function for the association. The authors have combined two exposures taken with the XMM-Newton satellite with an exhaustive data set of optical, near- and mid-infrared photometry to assess the membership of the X-ray sources based on different color-color and color-magnitude diagrams, as well as other properties, such as effective temperatures, masses and bolometric luminosities derived from spectral energy distribution fitting and comparison with theoretical isochrones. The presence of circumstellar disks is discussed using mid-infrared photometry from the Spitzer Space Telescope. The authors searched for optical and IR counterparts for their X-ray detections, using a radius of 5.1 arcseconds. This search radius is motivated by the astrometry of XMM-Newton (~ 1-2 arcsec) and the statistical errors of the X-ray sources (<= 4 arcsecs). Multiple counterparts were found for several X-ray sources within their search radius. The visual inspection of all optical and IR images indicated that in a few cases there were additional possible counterparts even slightly beyond this search radius. In order to be as comprehensive as possible, the authors have also retained them. They compiled a master catalog with all sources that were present in at least one of the mappings (optical, near-IR or mid-IR) and extracted the photometry from these surveys. The photometry of all possible counterparts to X-ray sources is listed in this table. The reference sources for the optical and infrared magnitudes are discussed in Section 3 of the reference paper. In this table, they are coded as follows: <pre> Code Reference Source 1 = 2MASS Catalog, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/II/246">CDS Cat. II/246</a> 2 = XMM-Newton Optical Monitor (XMM OM) 3 = Spitzer 4 = Omega 2000 Camera photometry in 2005 5 = CFHT1999 Survey 6 = Barrado y Navascues et al. (2004 ApJ, 610, 1064; 2007 ApJ, 664, 481) 7 = Dolan & Mathieu (1999 AJ, 118, 2409; 2001 AJ, 121, 2124) 8 = Dolan & Mathieu (2002 AJ, 123, 387) 9 = Omega 2000 Camera photometry in 2007 </pre> Thus, this table contains optical and infrared data, as well as membership information, on 205 possible counterparts to the 164 XMM-Newton X-ray sources detected in EPIC observations of the Collinder 69, East and West Fields (C69E and C69W), respectively, with maximum likelihood (ML) values > 15.0. A companion HEASARC Browse table COLL69XMM contains the X-ray data for these X-ray sources. This table was created by the HEASARC in July 2011 based on the electronic versions of Tables 5, 6, 8 and 9 from the reference paper which were obtained from the CDS (their catalog J/A+A/526/A21 files table5.dat, table6.dat, table8.dat and table9.dat). This is a service provided by NASA HEASARC . 2011A&A...526A..21B https://heasarc.gsfc.nasa.gov/W3Browse/all/coll69oid.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=coll69oid& GET text/xml 180 99999 true 84.00282 9.686557 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=coll69oid GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_coll69oid&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 Infrared Optical public coll69oid Collinder 69 Cluster Optical/IR Counterparts to XMM-Newton X-Ray name Source Designation (C69-X-eNNNc or C69-X-wNNNc) 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 vmag Johnson V Magnitude mag phot.mag;em.opt.V double nullable ic_mag Cousins I Magnitude mag phot.mag;em.opt.I double nullable irac_3p6_um_mag Spitzer/IRAC 3.6um Magnitude mag phot.mag;em.IR.3-4um double nullable final_member_flag [Y? co NM noD] Final Membership Assignment meta.code;src char nullable disk_class Flag [I/- ] Indicates Disk Class from IRAC Colors meta.code;src.class char nullable jmag_limit Limit Flag for Jmag meta.code;phot.mag;em.IR.J char nullable sacco_member_flag Flag [YN?-] Indicates Sacco Membership Assignment meta.code;src char nullable ref_bmag Reference for Bmag meta.ref;phot.mag;em.opt.B char nullable hmag_error RMS Uncertainty on Hmag mag stat.error;phot.mag;em.IR.H double nullable kmag_error RMS Uncertainty on Kmag mag stat.error;phot.mag;em.IR.K double nullable irac_8p0_um_mag_error RMS Uncertainty on Spitzer/IRAC 8.0um Magnitude mag stat.error;phot.mag;em.IR.4-8um double nullable xray_name X-Ray Source Designation (Optical/IR Source Name Minus the Multiplicity Index) meta.id.assoc char nullable ic_mag_error RMS Uncertainty on Ic Magnitude mag stat.error;phot.mag;em.opt.I double nullable cmd_member_flag Flag [YN?-] Indicates Color-Magnitude Membership Assignment meta.code;src char nullable irac_4p5_um_mag Spitzer/IRAC 4.5um Magnitude mag phot.mag;em.IR.4-8um double nullable bmag_error RMS Uncertainty on Bmag mag stat.error;phot.mag;em.opt.B double nullable mips_24_um_mag_error RMS Uncertainty on Spitzer/MIPS 24um Magnitude mag stat.error;phot.mag;em.IR.15-30um double nullable ref_jmag Reference for Jmag meta.ref;phot.mag;em.IR.J char nullable dm99_id_number Dolan & Mathieu (1999, J/AJ/118/2409; 2001, J/AJ/121/2124) Identification Number meta.id.cross short nullable ref_irac_4p5_um_mag Reference for Spitzer/IRAC 4.5um Magnitude meta.ref;phot.mag;em.IR.4-8um char nullable ref_irac_5p8_um_mag Reference for Spitzer/IRAC 5.8um Magnitude meta.ref;phot.mag;em.IR.4-8um char nullable jmag Johnson J Magnitude mag phot.mag;em.IR.J double nullable rc_mag Cousins R Magnitude mag phot.mag;em.opt.R double nullable vmag_error RMS Uncertainty on Vmag mag stat.error;phot.mag;em.opt.V double nullable irac_3p6_um_mag_error RMS Uncertainty on Spitzer/IRAC 3.6um Magnitude mag stat.error;phot.mag;em.IR.3-4um double nullable irac_4p5_um_mag_error RMS Uncertainty on Spitzer/IRAC 4.5um Magnitude mag stat.error;phot.mag;em.IR.4-8um double nullable ref_mips_24_um_mag Reference for Spitzer/MIPS 24um Magnitude meta.ref;phot.mag;em.IR.15-30um char nullable byn_id_number Barraod y Navascues et al. J/ApJ/610/1064 Identification Number (LOri-CFHT NN) meta.id.cross short nullable hrd_member_flag Flag [YN?-] Indicates HR Diagram Membership Assignment meta.code;src char nullable ref_rc_mag Reference for Rc Magnitude meta.ref;phot.mag;em.opt.R char nullable lii Galactic Longitude degree pos.galactic.lon double nullable ref_vmag Reference for Vmag meta.ref;phot.mag;em.opt.V char nullable irac_5p8_um_mag_error RMS Uncertainty on Spitzer/IRAC 5.8um Magnitude mag stat.error;phot.mag;em.IR.4-8um double nullable rc_mag_error RMS Uncertainty on Rc Magnitude mag stat.error;phot.mag;em.opt.R double nullable ref_irac_3p6_um_mag Reference for Spitzer/IRAC 3.6um Magnitude meta.ref;phot.mag;em.IR.3-4um char nullable spect_type MK Spectral Type src.spType char nullable ref_kmag Reference for Kmag meta.ref;phot.mag;em.IR.K char nullable kmag_limit Limit Flag for Kmag meta.code;phot.mag;em.IR.K char nullable hmag_limit Limit Flag for Hmag meta.code;phot.mag;em.IR.H char nullable jmag_error RMS Uncertainty on Jmag mag stat.error;phot.mag;em.IR.J double nullable hmag Johnson H Magnitude mag phot.mag;em.IR.H double nullable ref_ic_mag Reference for Ic Magnitude meta.ref;phot.mag;em.opt.I char nullable bii Galactic Latitude degree pos.galactic.lat double nullable mips_24_um_mag Spitzer/MIPS 24um Magnitude mag phot.mag;em.IR.15-30um double nullable qso_flag Flag [Yes/No/pos/?] Indicates QSO meta.code;src.class char nullable ref_irac_8p0_um_mag Reference for Spitzer/IRAC 8.0um Magnitude meta.ref;phot.mag;em.IR.4-8um char nullable irac_5p8_um_mag Spitzer/IRAC 5.8um Magnitude mag phot.mag;em.IR.4-8um double nullable bmag Johnson B Magnitude mag phot.mag;em.opt.B double nullable ccd_member_flag Flag [YN?-] Indicates Color-Color Membership Assignment meta.code;src char nullable usno_a2_name USNO-A2 (I/252) Designation meta.id.cross char nullable kmag Johnson K Magnitude mag phot.mag;em.IR.K double nullable ref_hmag Reference for Hmag meta.ref;phot.mag;em.IR.H char nullable irac_8p0_um_mag Spitzer/IRAC 8.0um Magnitude mag phot.mag;em.IR.4-8um double 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