IX/62ivo://CDS.VizieR/IX/62CDSRots A.Kim D.-W.CSC team2021-09-06T08:44:41Z2021-01-25T07:27:45ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frx-ray-sourcessurveysvisible-astronomyastronomical-object-identificationWe present a catalog of Chandra Source Catalog 2.0 sources cross-matched with SDSS DR15/16 counterparts. The crossmatch is performed with a Bayesian method developed by Budavari & Szalay (2008ApJ...679..301B) as implemented and extended by A. Rots (2020, https://cxc.cfa.harvard.edu/cda/files/XmatchQuickSummary.pdf) that takes into account local source density as well as both error ellipses and raw-size ellipses of the sources (for more details, see https://cxc.cfa.harvard.edu/cda/files/XmatchQuickSummary.pdf). CSC2.0 sources are extracted from the CSC2.0 "Master Source" table (https://cxc.harvard.edu/csc/columns/master_alpha.html), while SDSS DR15 are from the "Star" or "Galaxy" views. For each crossmatched source pair the match probability, match type and match grade are provided. In addition, ambiguous matches are explicitly called out and provided in separate published tables. The lists of ambiguous matches can be found in the following files: https://cxc.cfa.harvard.edu/cda/files/CSC2-SDSSDR15SG_AmbiguousXmatch.txt https://cxc.cfa.harvard.edu/cda/files/SDSSDR15SG-CSC2_AmbiguousXmatch.txt and a simple readme file is located at: https://cxc.cfa.harvard.edu/cda/files/AmbiguousXmatch.readme2021yCat.9062....0Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/IX/62CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/57 : The Chandra Source Catalog (CSC), Release 2.0 (Evans+, 2019)https://cxc.cfa.harvard.edu/cda : Chandra Data Archive Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=IX/62https://vizier.iucaa.in/viz-bin/VizieR-2?-source=IX/62http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=IX/62https://vizier.cds.unistra.fr/viz-bin/votable?-source=IX/62https://vizier.iucaa.in/viz-bin/votable?-source=IX/62http://vizieridia.saao.ac.za/viz-bin/votable?-source=IX/62GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table IX/62/catalog (CSC2-SDSSDR15 crossmatch catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/IX/62/catalog?https://vizier.iucaa.in/viz-bin/conesearch/IX/62/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/IX/62/catalog?GETtext/xml+votable180.050000true215.83172534.811346110.0055555555555555564/1733 5/1030 1094 1100 1101 1337 1392 1397 1399 1404 1449 1454 1613 1627 1654 1805 1806 1810 1827 1856 2048 2055 2066 2067 2156 2228 2237 2259 2286 2287 2588 2597 2628 2629 2661 2676 2761 2856 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31406 31407 31416 31417 31419 31422 31435 31436 31453 31459 31461 31469 31472https://cdsarc.cds.unistra.fr/viz-bin/moc/IX/62?format=asciiX-rayOpticaldefaultIX/62/catalogCSC2-SDSSDR15 crossmatch catalogMatchGrade[D/L] Match grade (6)meta.code.qualcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCSC2CSC2 name, 2CXO JHHMMSS.s+DDMMSS (name)meta.id;meta.maincharTypeC[PX] CSC2 type (1)src.classcharRA_ICRSCSC2 Right Ascension (ICRS) (ra)degpos.eq.ra;meta.mainindexedDE_ICRSCSC2 Declination (ICRS) (dex)degpos.eq.dec;meta.mainindexedErrMaj95CCSC2 semi major axis of the 95% confidence level position error ellipse (err_ellipse_r0)arcsecphys.angSize;srcdoubleErrMin95CCSC2 semi minor axis of the 95% confidence level position error ellipse (err_ellipse_r1)arcsecphys.angSize.sminAxis;pos.errorEllipsedoubleErrPACCSC2 position angle relative to the local true N of the major axis of the 95% confidence level position error ellipse (err_ellipse_ang)degpos.posAng;pos.errorEllipsedoubleRawMaj1sigCCSC2 semi major axis of the 1-sigma ellipse fitted to the source as seen in the imagearcsecphys.angSize;srcdoubleRawMin1sigCCSC2 semi minor axis of the 1-sigma ellipse fitted to the source as seen in the imagearcsecphys.angSize.sminAxis;meta.modelleddoubleRawPACCSC2 position angle of the 1-sigma ellipse fitted to the source as seen in the imagedegpos.posAng;meta.modelleddoubleMatchMaj1sigCCSC2 match major axis of the ellipse used for the crossmatcharcsecphys.angSizedoubleMatchMin1sigCCSC2 match semi minor of the ellipse used for the crossmatcharcsecphys.angSize.sminAxisdoubleMatchPA1sigCCSC2 match position angle of the ellipse used for the crossmatchdegpos.posAngdoubleSDSSDR15SDSS unique identifiermeta.id.crossTypeS[S/G] SDSS Type classification (type) (2)src.classcharRASdegSDSS Right Ascension (J2000)degpos.eq.raDESdegSDSS Declination (J2000)degpos.eq.decErrMaj1sigSSDSS semi major axis of the 1-sigma error ellipse (3)arcsecphys.angSize;srcdoubleErrMin1sigSSDSS semi minor axis of the 1-sigma error ellipse (4)arcsecphys.angSize.sminAxis;pos.errorEllipsedoubleErrPA1sigSSDSS position angle (local true N) of the 1-sigma error ellipse with major and minor axes (defined as abovedegpos.posAng;pos.errorEllipsefloatRawMaj1sigSSDSS semi major axis of the source raw 1-sigma size ellipse, calculated from adaptive momentsarcsecphys.angSize;srcdoubleRawMin1sigSSDSS semi minor axis of the source raw 1-sigma size ellipse, calculated from adaptive momentsarcsecphys.angSize.sminAxisdoubleRawPa1sigSSDSS position angle of the source raw 1-sigma size ellipse, calculated from adaptive momentsdegpos.posAngdoubleMatchMaj1sigSSDSS match semi major of the ellipse used for the crossmatcharcsecphys.angSize;srcdoubleMatchMin1sigSSDSS match semi minor of the ellipse used for the crossmatcharcsecphys.angSize.sminAxisdoubleMatchPA1sigSSDSS match position relative to the local true N of the ellipse used for the crossmatchdegpos.posAngdoubleSepAngular distance between CSC2 and SDSSDR15 sourcesarcsecpos.angDistancedoubleMatchProb[0/1] Match probabilitystat.fit.goodnessdoubleMatchType[E/R] Match type (5)meta.codechar