J/MNRAS/253/686ivo://CDS.VizieR/J/MNRAS/253/686doi:10.26093/cds/vizier.72530686CDSCOLLESS M.ELLIS R.S.TAYLOR K.SHAW G.2013-03-06T05:35:21Z1997-12-09T21:36:09ZCDS support team

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

cds-question@unistra.frsurveysspectroscopyastrometrytwo-color-diagramsstellar-spectral-typesWe present results from a low-resolution (73A) spectroscopic survey of faint compact objects conducted with the Low Dispersion Survey Spectrograph at the Anglo-Australian Telescope. The sample is a random subset of all compact sources with 22.5<=b_j_<=23.5 in three high-latitude fields. Additional data on compact sources with 21<=b_j_<=22.5 have been selected from the higher resolution (13A) survey previously published by Colless et al. (1990), and a subset of these brighter objects has been studied at both dispersions. Table 1: Summary of the photographic photometry. ------------------------------------------------------------------------ Field Band AAT Seeing Isophote Survey range plates arcsec mag/arcsec2 mag ------------------------------------------------------------------------ 10hr bj J1834 1.7 26.44 20.98<bJ<23.48 rF F1835 1.8 24.61 U U2206 2.0 25.09 13hr bj J1836 1.8 26.52 20.94<bJ<23.44 rF F1837 2.3 24.82 (20.00<bJ<23.60 in zone 13.1) U U2208 2.3 24.88 ------------------------------------------------------------------------ Table 2: The survey observations ------------------------------------------------------------------------ Survey alpha delta Obsvn Detector Exposure Area zone (1950) dates time(s) deg2 ------------------------------------------------------------------------ 10.2 10 43 55.4 +00 05 33 18/3/88 IPCS 15000 0.0330 10.4 10 43 51.4 -00 06 41 20/3/88 IPCS 13500 0.0330 13.1 13 40 32.0 +00 13 22 1-2/6/86 CCD 14500 0.0078 13.2 13 41 57.3 +00 06 25 18/3/88 IPCS 12000 0.0330 ------------------------------------------------------------------------ Table 5: Total b_j_ surface density ------------------------------------------------------------------------ bj-rF Field 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 Total ------------------------------------------------------------------------ a 0 0 0 0 74 89 0 296 612 210 1281 b 44 0 105 317 270 224 91 357 702 241 2351 c 0 92 188 278 49 188 98 379 572 196 2040 d 46 190 382 564 147 188 147 379 572 196 2811 ------------------------------------------------------------------------ Table7: Colour distribution of unknown compact sources ------------------------------------------------------------------------ Numbers (deg-2) b_j_-r_F_ 21<=b_j_<=22.5 22.5<=b_J_<=23.5 ------------------------------------------------------------------------ <0.25 - - 0.25-0.50 71 19 0.50-0.75 82 56 0.75-1.00 94 150 1.00-1.25 82 224 1.25-1.50 118 37 1.50-1.75 - 56 1.75-2.00 - 56 2.00-2.25 35 56 2.25-2.50 - 56 2.50-2.75 - 38 2.75-3.00 - 19 >3.00 - - No colour 71 94 Total unknown 552 804 Total compact 1333 1560 All objects 5620 10427 ------------------------------------------------------------------------1991MNRAS.253..686Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/253/686CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/253/686https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/253/686http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/253/686https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/253/686https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/253/686http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/253/686GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/253/686/table3 (The survey catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/253/686/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/253/686/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/253/686/table3?GETtext/xml+votable180.050000true161.6681267-0.12669090.0055555555555555566/26019 26022 27044 27046https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/253/686?format=asciiOpticaldefaultJ/MNRAS/253/686/table3The survey cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdIdentification numbermeta.id;meta.maincharRA1950Right ascension 1950.0pos.eq.ra;meta.mainDE1950Declination 1950.0pos.eq.dec;meta.mainbjb_j_ magnitudemagphot.mag;em.opt.Bfloatbj-rF[]? b_j_-r_F_ colour indexmagphot.color;em.opt.B;em.opt.RfloatnullableU-bj[]? U-b_j_ colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablez[]? Redshiftsrc.redshiftfloatnullableSIDSpectral identification (1)meta.idcharcomCommentsmeta.notechar_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.decnullableindexedJ/MNRAS/253/686/table5Surface densities of spectroscopically confirmed stars (STARS) and objects not identified as galaxies (NONGAL)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS0.50Distribution for objects with bj-rf=0.50deg**-2src.densityintFieldField designation (1)obs.fieldcharbjb_j_ magnitude of the objectsmagphot.mag;em.opt.BfloatS0.25Distribution for objects with bj-rf=0.25deg**-2src.densityintS0.75Distribution for objects with bj-rf=0.75deg**-2src.densityintS1.00Distribution for objects with bj-rf=1.00deg**-2src.densityintS1.25Distribution for objects with bj-rf=1.25deg**-2src.densityintS1.50Distribution for objects with bj-rf=1.50deg**-2src.densityintS1.75Distribution for objects with bj-rf=1.75deg**-2src.densityintS2.00Distribution for objects with bj-rf=2.00deg**-2src.densityintS2.25Distribution for objects with bj-rf=2.25deg**-2src.densityintS2.50Distribution for objects with bj-rf=2.50deg**-2src.densityintStotTotal distributiondeg**-2src.densityint