J/ApJS/94/749ivo://CDS.VizieR/J/ApJS/94/749doi:10.26093/cds/vizier.20940749CDSKirkpatrick J.D.McGraw J.T.Hess T.R.Liebert J.McCarthy Jr D.W.2013-03-06T06:18:34Z2000-01-29T18:50:05ZCDS support team

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

cds-question@unistra.frdwarf-starsinfrared-photometryvisible-astronomyphotometrylate-type-starsThe luminosity function at the end of the main sequence is determined from V, R, and I data taken by the CCD/Transit Instrument (CTI), a dedicated telescope surveying an 8.25' wide strip of sky centered at {delta}=+28{deg}, thus sampling Galactic latitudes of +90{deg} down to -35{deg}. A selection of 133 objects chosen via R-I and V-I colors has been observed spectroscopically at the 4.5m Multiple Mirror Telescope to assess contributions by giants and subdwarfs and to verify that the reddest targets are objects of extremely late spectral class. Eighteen dwarfs of type M6 or later have been discovered, with the latest being of type M8.5. Data used for the determination of the luminosity function cover 27.3{deg}^2^ down to a completeness limit of R=19.0.1994ApJS...94..749Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/94/749CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/98 : NLTT Catalogue (Luyten, 1979)J/AJ/106/773 : Mass-luminosity relation (Henry+, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/94/749https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/94/749http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/94/749https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/94/749https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/94/749http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/94/749GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/94/749/table1 (CTI objects observed spectroscopically)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/94/749/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/94/749/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/94/749/table1?GETtext/xml+votable180.050000true0.3908728.1450350.005555555555555556Cone search capability for table J/ApJS/94/749/table5 (Stars from the NLTT catalog (Cat. <I/98>) that should be in the CTI strip)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/94/749/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/94/749/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/94/749/table5?GETtext/xml+votable180.050000true15.19603528.0651190.0055555555555555566/507 508 759 763 827 839 843 845 849 864 907 912 1120 1184 1185 2107 2110 2119 2123 2124 2144 2145 2187 2190 2192 2193 4599 4603 4855 4924 4925 4935 4939 4940 4960 4999 5175 5180 5191 5195 5196 5259 5264 6203 6215 6219 6220 6283 8699 8700 8951 8955 8956 9015 9021 9275 9276 9287 9292 9296 9351 9355 9356 10295 10311 10313 10315 10316 10336 10379 10384 12795 13111 13195 13216 13372 13388 13389 13392 13394 13408 13410 13456 14396 14471 14475 14476 14481 14496 14497 19959 19964 20215 20219 20279 20284 20295 20300 20301 20304 20320 20321 20363 20364 20368 20384 24055 24462 24464 28151 28155 28156 28411 28471 28476 28492 28555 28556 28576 32247 32503 32507 32508 32567 32571 32572 32573 32594 32647 32656https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/94/749?format=asciiOpticalInfrareddefaultJ/ApJS/94/749/table1CTI objects observed spectroscopicallyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCTICTI namemeta.id;meta.maincharprimaryn_CTI[AB:+] Note on CTI (1)meta.notecharRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainRmag? CTI R magnitudemagphot.mag;em.opt.Rfloatnullableu_RmagUncertainty flag on Rmagmeta.code.errorcharR-I? CTI (R-I) colour indexmagphot.color;em.opt.R;em.opt.Ifloatnullablee_R-I? rms uncertainty on R-Imagstat.error;phot.color;em.opt.Rfloatnullableu_R-IUncertainty flag on R-Imeta.code.error;phot.color;em.opt.RcharV-I? CTI (V-I) colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.Vfloatnullableu_V-IUncertainty flag on V-Imeta.code.error;phot.color;em.opt.VcharSpTypeSpectral typesrc.spTypecharDateObservation date (UT)time.epoch;obsnullableDate2Second day when there is an intervalmeta.notecharIntIntegration timestime.epochint_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/ApJS/94/749/table5Stars from the NLTT catalog (Cat. <I/98>) that should be in the CTI stripCTICTI namemeta.id;meta.maincharprimaryNoteNotesmeta.notecharl_RmagLimit flag on Rmagmeta.code.errorcharNameObject namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintmrRed magnitude (1)magphot.mag;em.opt.RfloatmpgPhotographic magnitude (1)magphot.mag;em.optfloatcolLuyten's color classsrc.class.colorcharpmTotal proper motionarcsec/yrpos.pmfloatRA1987Right ascension (1987.5) (2)pos.eq.ra;meta.mainDE1987Declination (1987.5) (2)pos.eq.dec;meta.mainn_CTI[cd] Note (3)meta.notecharRmag? CTI R (or V if n_Rmag=V) magnitudemagphot.mag;em.opt.Rfloatnullablen_Rmag[V] V: CTI V magnitude in Rmag columnmeta.notecharR-I? CTI R-I colour indexmagphot.color;em.opt.R;em.opt.Ifloatnullablee_R-I? rms uncertainty on R-Imagstat.error;phot.color;em.opt.Rfloatnullable_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