I/263ivo://CDS.VizieR/I/263CDSStone R.C.Pier J.R.Monet D.G.2013-02-16T11:37:54Z2000-06-12T23:51:42ZCDS support team

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

cds-question@unistra.froptical-observationcatalogsastrometryproper-motionsapparent-magnitudeWe present improved and highly accurate International Celestial Reference System (ICRS) equatorial positions for 1,268,732 stars in 16 astrometric calibration regions located around the celestial equator. Each region is about 7.6{deg}x3.2{deg} in area (~24.3 deg^2^), contains a large number of stars (18,767 to 263,810), has stellar densities ranging from 765 to 10,772 stars deg^-2^, covers a wide range in magnitude (9.5<R<17.8, or equivalently 10.0<V<18.3), and is complete to magnitude R~17.2 (V~17.7). All of the observations were taken in 1994-1998 (mean epoch J1996.0) with the Flagstaff Astrometric Scanning Transit Telescope. Furthermore, each region was observed many times with overlapped CCD strip scans, and these data were reduced to star positions using differential reductions. The reference-star positions were taken from the ACT catalog of accurate star positions and proper motions. The star positions presented herein are typically accurate to +/-26mas (+/-12mas precision) in both right ascension and declination, except for the faintest stars, whose errors are about 2 times larger. Similarly, magnitudes were determined for the astrometric calibration stars using standard photometric reductions, and accuracies of +/-18mmag (+/-10mmag precisions) were achieved (about +/-46mmag for the faintest stars)1999AJ....118.2488Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/263CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/246 : The ACT Reference Catalog (Urban+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/263https://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/263http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/263https://vizier.cds.unistra.fr/viz-bin/votable?-source=I/263https://vizier.iucaa.in/viz-bin/votable?-source=I/263http://vizieridia.saao.ac.za/viz-bin/votable?-source=I/263GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/263/acr_a (The whole ACR catalogue around Celestial Equator (regions A through P))https://vizier.cds.unistra.fr/viz-bin/conesearch/I/263/acr_a?https://vizier.iucaa.in/viz-bin/conesearch/I/263/acr_a?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/263/acr_a?GETtext/xml+votable180.050000true7.883681940.826353060.005555555555555556Cone search capability for table I/263/table1 (Astrometric calibration regions)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/263/table1?https://vizier.iucaa.in/viz-bin/conesearch/I/263/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/263/table1?GETtext/xml+votable180.050000true7.88375-1.6441670.0055555555555555564/1114 1178 1190 1369 1381 1449 1641 1689 1701 1894 1941 1957 1961 5/4415 4451 4460 4495 4501 4504 4506 4507 4516 4517 4519 4528 4544 4671 4707 4716 4751 4773 4784 4800 5455 5466 5475 5484 5488 5523 5529 5532 5695 5736 5738 5739 5775 5780 5781 5783 5784 5786 5787 5808 5824 6463 6504 6506 6507 6543 6548 6549 6551 6554 6576 6592 6719 6735 6746 6755 6764 6768 6803 6809 6812 6848 7423 7567 7588 7589 7591 7592 7594 7595 7600 7827 7833 7836 7843 7848 7849 7851 7852 7936 6/17655 17659 17803 17818 17848 17975 17979 17995 18001 18013 18020 18022 18023 18040 18073 18116 18120 18180 18184 18679 18823 18827 18840 18842 18843 18868 18872 18999 19003 19019 19020 19022 19023 19029 19056 19058 19059 19064 19089 19101 19140 19144 19204 21755 21756 21758 21759 21815 21819 21858 21870 21895 21925 21940 21956 21960 22087 22091 22113 22125 22132 22136 22272 22274 22275 22280 22775 22779 22923 22948 22950 22951 23095 23099 23111 23128 23129 23131 23142 23156 23175 23180 23181 23183 23216 23217 23219 23220 23236 23240 23300 23304 25847 25851 26020 26022 26023 26167 26171 26183 26200 26201 26203 26210 26211 26220 26222 26228 26247 26252 26253 26255 26288 26289 26291 26292 26308 26312 26372 26376 26875 26935 26939 26978 26990 27015 27045 27050 27060 27076 27080 27207 27211 27233 27245 27252 27256 27400 29687 29691 30263 30267 30283 30286 30322 30328 30361 30374 30404 30408 30971 30972 30974 30975 31047 31053 31089 31092 31291 31294 31303 31307 31329 31331 31340 31341 31348 31352 31367 31371 31400 31401 31403 31412 31416 31426 31432 31488 31490 31491 31496 31748 31752 45047https://cdsarc.cds.unistra.fr/viz-bin/moc/I/263?format=asciiOpticaldefaultI/263/acr_aThe whole ACR catalogue around Celestial Equator (regions A through P)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintACRStar designation (ACR xxyyyyyy) (1)meta.idlongindexedACR1Old star designation used in Paper I (1997AJ....114.2811S)meta.id;meta.mainlongRAJ2000ICRS J2000 right ascensiondegpos.eq.ra;meta.maine_RAJ2000True error in RA*cosDEmasstat.errorinto_RAJ2000Number of observations used to compute RAmeta.numberintDEJ2000ICRS J2000 declinationdegpos.eq.dec;meta.maine_DEJ2000True error in declinationmasstat.error;pos.eq.decinto_DEJ2000Number of observations used to compute DEmeta.numberintRFmagRF-magnitude (G1)magphot.mag;em.opt.Rfloate_RFmagTrue error in the RF-magnitudemagstat.error;phot.magfloato_RFmagNumber of observations used to compute RF-magnitudemeta.numberintEpRA-1900Mean epoch for the RA (1900+)yrtime.epochfloatEpDE-1900Mean epoch for the declination (1900+)yrtime.epochfloatpmRAProper motion in RA (seconds/cy) (2)s/hyrpos.pm;pos.eq.rafloate_pmRA? Error in the proper motion in RA (2)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDEProper motion in DE (arcsec/cy) (2)arcsec/hyrpos.pm;pos.eq.decfloate_pmDE? Error in the proper motion in DE (2)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableI/263/table1Astrometric calibration regionsDE2Ending J2000 declinationpos.eq.rarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegionRegional designation (A to P)obs.fieldcharRA1Beginning J2000 Right ascension boundarypos.eq.raDE1Beginning J2000 declinationpos.eq.raRA2Ending J2000 Right ascension boundarypos.eq.raSize1Angular dimensions of the regiondegphys.size;instr.platefloatSize2Angular dimensions of the regiondegphys.size;instr.platefloatNstarsNumber of stars in the regionmeta.numberintDensityMean stellar densitycount.deg**-2phys.density;stat.meanfloatRFmagLimiting RF-magnitude reached (G1)magphot.mag;em.opt.RfloatGLONGalactic longitude at the center of each regiondegpos.galactic.lonGLATGalactic latitude at the center of each regiondegpos.galactic.latfloatI/263/table8Internal and true accuracies of ACR star positions and magnitudes at epochs J1996 and J2006recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRFlRF magnitude range (lower) (G1)magphot.magfloatRFuRF magnitude range (upper) (G1)magphot.magfloatRAIInternal accuracy for Right ascensionmasstat.errorDEIInternal accuracy for Declinationmasstat.errorRFIInternal accuracy for RF magnitude (G1)mmagstat.errorintRA1True accuracy for RA at epoch J1996masstat.errorDE1True accuracy for DE at epoch J1996masstat.errorRF1True accuracy for RF magnitude at epoch J1996mmagstat.errorintRA2True accuracy for RA at epoch J2006masstat.errorDE2True accuracy for DE at epoch J2006masstat.errorRF2True accuracy for RF magnitude at epoch J2006mmagstat.errorint