J/AJ/105/393ivo://CDS.VizieR/J/AJ/105/393doi:10.26093/cds/vizier.51050393CDSKent S.M.Ramella M.Nonino M.2023-04-06T16:49:27Z1997-12-09T20:02:19ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsapparent-magnitudeThe file is an ASCII text file containing data for 1053 galaxies brighter than 18.0 mag. in the filter used. The effective wavelength of this filter for objects that have the color of galaxies closely matches that of Thuan and Gunn r filter. The strip covered in the survey is 12 arcmin wide by 60 degree long. The observations were carried out on the night of 23 May 1990, using the drift scanning technique, with the 24 inch telescope of the Whipple Observatory. The effective integration time was 57 s. Introduction: One key problem of galaxy surveys using photographic plates is an accurate magnitude calibration. Moreover sensitivity and vignetting variations across the plate, need to be removed. The drift-scan technique is a viable alternative: in this observing mode the telescope tracking is stopped and the CCD is clocked at the sidereal rate. CCD columns are aligned in the east-west direction. The CCD is read continuously, building up an image of a strip of the sky. Data were reduced in the standard manner, but replacing bias with drift dark (CCD is operating in drift scan mode with the shutter closed). Flatfields were obtained from median averaging sets of data frames. Astrometry was done using stars whose position was known from the Guide Star Catalog. The galaxy-star classification was done using the east-west FWHM. Then every candidate galaxy was visually inspected. Important Notice: The published coordinates have errors (up to 6" in the worst case): this is due to a charge smearing problem, which correlates with magnitude. The coordinates in this version are the corrected ones.1993AJ....105..393Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/105/393CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/105/393https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/105/393http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/105/393https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/105/393https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/105/393http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/105/393GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/105/393/table (*The galaxy catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/105/393/table?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/105/393/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/105/393/table?GETtext/xml+votable180.050000true177.7731579629.288915110.0055555555555555566/8702-8703 8957-8959 9023 9037 9039 9043-9044 9048-9050 9058-9060 9062 9064-9065 9103 9106-9108 9112 9114 9121 9123-9125 9128 9130 9279 9313 9315-9316 9318 9320 9361 9363-9366 10303 10319 10321 10323-10326 10328-10330 10339-10340 10344-10346 10381-10383 10385-10390 10392-10393 10402-10404 10408-10409 28158-28159 28477 28479 28494-28495 28497 28499-28500 28504 28513 28515-28517 28520 28522 28561 28563-28566https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/105/393?format=asciiOpticaldefaultJ/AJ/105/393/table*The galaxy catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/1054]+ Number as in the published versionmeta.recordintprimaryindexedRA1950[11/16]+= 1950 Right Ascensionpos.eq.ra;meta.mainDE1950[29/29] 1950 Declination degreespos.eq.dec;meta.mainMagMagnitudemagphot.magfloatu_MagUncertainty Flag on Magnitudemeta.code.errorcharApAperture radius used to compute Magarcsecphys.angSizefloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed