I/271ivo://CDS.VizieR/I/271CDSSTScI2026-03-20T08:52:19Z2001-12-13T06:36:19ZCDS support team

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

cds-question@unistra.frsurveysastrometryphotographic-magnitudegalaxy-classification-systemsThe GSC II is an all-sky catalog based on 1" resolution scans of the photographic Sky Survey plates, at two epochs and three bandpasses, from the Palomar and UK Schmidt telescopes (DSS). Positions, magnitudes, and classifications are produced for all objects on each plate. The objects are then loaded into the COMPASS database, where multiple observations of the same object are matched and assigned a unique name. The GSC2.2 is a preliminary version of GSC II generated to support telescope operations at the GEMINI and VLT telescopes. The magnitude limits are 18.5 in photographic F (red) or 19.5 in photographic J (blue) or V. The parameters of the bright objects, overexposed on the Schmidt plates, are taken from the Tycho-2 (I/259) catalog. The final version (GSC 2.3), expected to be released in 2002, will also contain proper motions.Space Telescope Science Institute (STScI) andhttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/271CatalogResearchIsServedByTAP VizieR generic serviceIsPreviousVersionOfI/305IsServedByConesearch servicerelated-tohttp://gsss.stsci.edu/catalogs/gsc/GSC2/GSC2.htm : the GSC-II Home PageI/254 : The HST Guide Star Catalog, Version 1.2 (Lasker+ 1996)I/259 : The Tycho-2 Catalogue (Hog+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/271https://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/271http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/271https://vizier.cds.unistra.fr/viz-bin/votable?-source=I/271https://vizier.iucaa.in/viz-bin/votable?-source=I/271http://vizieridia.saao.ac.za/viz-bin/votable?-source=I/271GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/271/out (output (out of 455851237 objects))https://vizier.cds.unistra.fr/viz-bin/conesearch/I/271/out?https://vizier.iucaa.in/viz-bin/conesearch/I/271/out?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/271/out?GETtext/xml+votable180.050000trueHips catalogue for table I/271/outhttps://hipscat.cds.unistra.fr/HiPSCatService/I/271/out0/0-11 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/I/271?format=asciiOpticaldefaultI/271/outoutput (out of 455851237 objects)GSC2.2Identification of the object (1)meta.id;meta.maincharprimaryRAICRSRight Ascension in ICRS (J2000), at "Epoch"degpos.eq.ra;meta.mainDEICRSDeclination in ICRS (J2000)degpos.eq.dec;meta.mainEpochEpoch of the positionyrtime.epochdoubleindexede_RAICRSMean error on RAdeg (2)arcsecstat.error;pos.eq.rafloate_DEICRSMean error on DEdeg (2)arcsecstat.error;pos.eq.decfloatRmag? Magnitude in F photographic band (red) (6)magphot.mag;em.opt.Rfloatnullablee_Rmag? Mean error on Rmag (2)magstat.error;phot.magfloatnullableBjmag? Magnitude in J photographic band (blue) (6)magphot.mag;em.opt.Bfloatnullablee_Bjmag? Mean error on Bjmag (2)magstat.error;phot.magfloatnullableVmag? Magnitude in V photographic band (green) (6)magphot.mag;em.opt.Vfloatnullablee_Vmag? Mean error on Vmag (2)magstat.error;phot.magfloatnullableImag? Magnitude in N photographic band (6)magphot.mag;em.opt.Ifloatnullablee_Imag? Mean error on Imag (2)magstat.error;phot.magfloatnullableClass[0,5] Object class (3)meta.code.classinta?Semi-major axis of fitting ellipsepixphys.angSize;srcdoublenullablee?Eccentricity of fitting ellipsesrc.orbital.eccentricityfloatnullableaPA?Position angle (N thru E) of fitting ellipsedegpos.posAngfloatnullableStatusSource status flag (4)meta.code.errorlongNpNumber of plates (5)meta.id;instr.plateint