J/ApJ/676/1281ivo://CDS.VizieR/J/ApJ/676/1281doi:10.26093/cds/vizier.16761281CDSMetchev S.A.Kirkpatrick J.D.Berriman G.B.Looper D.2010-11-26T15:13:18Z2010-11-05T13:13:47ZCDS support team

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

cds-question@unistra.frdwarf-starsinfrared-photometryvisible-astronomysloan-photometryWe report new L and T dwarfs found in a cross-match of the SDSS Data Release 1 and 2MASS. Our simultaneous search of the two databases effectively allows us to relax the criteria for object detection in either survey and to explore the combined databases to a greater completeness level. We find two new T dwarfs in addition to the 13 already known in the SDSS DR1 footprint. We also identify 22 new candidate and bona fide L dwarfs, including a new young L2 dwarf and a peculiar potentially metal-poor L2 dwarf with unusually blue near-IR colors. These discoveries underscore the utility of simultaneous database cross-correlation in searching for rare objects.2008ApJ...676.1281Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/676/1281CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)J/AJ/126/2487 : T dwarfs in the southern hemisphere (Burgasser+, 2003)J/AJ/127/2856 : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)J/AJ/127/3553 : Land T dwarfs JHK phot. and spectroscopy (Knapp+, 2004)J/AJ/131/2722 : New L and T dwarfs from the SDSS (Chiu+, 2006)J/AJ/134/1162 : 11 new T dwarfs in 2MASS (Looper+, 2007)J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)J/MNRAS/384/1399 : Proper motions of field L and T dwarfs (Jameson+, 2008)J/other/ARA+A/43.195 : L and T dwarf stars (Kirkpatrick, 2005)http://www.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/676/1281https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/676/1281http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/676/1281https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/676/1281https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/676/1281http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/676/1281GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/676/1281/table5 (Spitzer IRAC observations and photometry of ultracool dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1281/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1281/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1281/table5?GETtext/xml+votable180.050000true139.4757560.46847220.005555555555555556Cone search capability for table J/ApJ/676/1281/table2 (Additional candidates near bright stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1281/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1281/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1281/table2?GETtext/xml+votable180.050000true112.622208327.15141670.005555555555555556Cone search capability for table J/ApJ/676/1281/table3 (Discarded candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1281/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1281/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1281/table3?GETtext/xml+votable180.050000true13.275125-9.34250.005555555555555556Cone search capability for table J/ApJ/676/1281/table7 (All Known T Dwarfs in SDSS DR1 and SDSS Flags (tables 7 and 14 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1281/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1281/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1281/table7?GETtext/xml+votable180.050000true27.92312512.74166670.005555555555555556Cone search capability for table J/ApJ/676/1281/table1 (Optical and near-IR photometry of candidate and known ultracool dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1281/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1281/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1281/table1?GETtext/xml+votable180.050000true7.164291715.02827780.005555555555555556Cone search capability for table J/ApJ/676/1281/table6 (Spectral types and colors of confirmed and candidate ultracool dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/676/1281/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/676/1281/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/676/1281/table6?GETtext/xml+votable180.050000true13.05133330.20477780.0055555555555555566/4096 4132 6195 6199 6517 6552 6597 6601 7200 7216 7229 7245 7246 7291 7306 7388 8216 9332 9642 9644 9959 9980 9991 10072 10114 10195 10220 11257 11358 11415 11506 11813 11814 11834 11841 11904 11940 17561 17577 17761 17807 17814 17998 18025 18032 18300 18405 18751 18956 19755 21878 21880 23185 25586 25935 26020 26046 26050 26196 26201 26210 26248 26304 26345 26406 27074 27121 27314 27414 27653 31294 31318 31319 31413 31419 31428 31434 31459 32682 49011 490162.0616683193919197e-20 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/676/1281?format=asciiOpticalInfrareddefaultJ/ApJ/676/1281/table5Spitzer IRAC observations and photometry of ultracool dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (HHMMSSss+DDMMSSs, J2000.0)meta.id;meta.maincharDateObservation datetime.epoch;obsnullableAORAOR keymeta.idintExpExposure timestime.duration;obs.exposureint[3.6]Spitzer/IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloate_[3.6]rms uncertainty on [3.6]magstat.errorfloat[4.5]Spitzer/IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloate_[4.5]rms uncertainty on [4.5]magstat.errorfloat[5.8]Spitzer/IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloate_[5.8]rms uncertainty on [5.8]magstat.errorfloat[8.0]Spitzer/IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloate_[8.0]rms uncertainty on [8.0]magstat.errorfloat2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/676/1281/table2Additional candidates near bright starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (HHMMSSss+DDMMSSs, J2000.0)meta.id;meta.maincharprimaryComCommentsmeta.notechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/676/1281/table3Discarded candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (HHMMSSss+DDMMSSs, J2000.0)meta.id;meta.maincharprimaryComCommentsmeta.notechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/676/1281/table7All Known T Dwarfs in SDSS DR1 and SDSS Flags (tables 7 and 14 of the paper)SpTypeMK spectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlag[PN] Previously known or New T dwarfmeta.code.errorchar2MASS2MASS name (HHMMSSss+DDMMSSs, J2000.0)meta.id;meta.maincharRefReference, in refs.dat filemeta.ref;pos.frame;meta.fileintNote[ab] Note on SDSS star (1)meta.notecharSDSSfSDSS Flagsmeta.notecharSloanDisplay the SDSS data for this starmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharDR7Display the photometry from SDSS-DR7 for this starmeta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.mainSDSSSDSS name (HHMMSS.ss+DDMMSS.s, J2000.0)meta.id;meta.maincharJ/ApJ/676/1281/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintprimaryBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharJ/ApJ/676/1281/table1Optical and near-IR photometry of candidate and known ultracool dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (HHMMSSss+DDMMSSs, J2000.0)meta.id;meta.maincharprimaryl_imagLimit flag in imagmeta.code.errorcharimagSDSS i magnitude (1)magphot.mag;em.opt.Ifloate_imag? rms uncertainty on imagmagstat.error;phot.mag;em.opt.Ifloatnullablen_imag[d] Note on imag (2)meta.notecharzmagSDSS z magnitudemagphot.mag;em.opt.Ifloate_zmagrms uncertainty on zmagmagstat.error;phot.mag;em.opt.Ifloatl_JmagLimit flag on Jmagmeta.code.errorcharJmag2MASS J magnitudemagphot.mag;em.IR.Jfloate_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.Jfloatnullablen_Jmag[c] Note on Hmag (2)meta.notecharl_HmagLimit flag on Hmagmeta.code.errorcharHmag2MASS H magnitudemagphot.mag;em.IR.Hfloate_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.Hfloatnullablel_KsmagLimit flag on Ksmagmeta.code.errorcharKsmag2MASS Ks magnitudemagphot.mag;em.IR.Kfloate_Ksmag? rms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullablen_Ksmag[c] Note on Ksmag (2)meta.notecharSpTypeMK spectral type (3)src.spTypecharRef? Reference, in refs.dat filemeta.ref;pos.frame;meta.fileintnullableSloanDisplay the SDSS data for this starmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharDR7Display the photometry from SDSS-DR7 for this starmeta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.mainJ/ApJ/676/1281/table6Spectral types and colors of confirmed and candidate ultracool dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (HHMMSSss+DDMMSSs, J2000.0)meta.id;meta.maincharSpTypeMK spectral typesrc.spTypecharl_i-zLimit flag on i-zmeta.code.errorchari-zSDSS i-z colour indexmagphot.color;em.opt.I;em.opt.Ifloate_i-z? rms uncertainty on i-zmagstat.errorfloatnullablel_z-JLimit flag on z-Jmeta.code.errorcharz-JSDSS-2MASS z-J colour indexmagphot.color;em.opt;em.IRfloate_z-J? rms uncertainty on z-Jmagstat.errorfloatnullablel_J-HLimit flag on J-Hmeta.code.error;phot.color;em.IR.JcharJ-H2MASS J-H colour indexmagphot.color;em.IR.J;em.IR.Hfloate_J-H? rms uncertainty on J-Hmagstat.error;phot.color;em.IR.Jfloatnullablel_H-KsLimit flag on H-Ksmeta.code.error;phot.color;em.IR.HcharH-Ks? 2MASS H-Ks colour indexmagphot.color;em.IR.H;em.IR.Kfloatnullablee_H-Ks? rms uncertainty on H-Ksmagstat.error;phot.color;em.IR.Hfloatnullablel_J-KsLimit flag on J-Ksmeta.code.error;phot.color;em.IR.JcharJ-Ks? 2MASS J-Ks colour indexmagphot.color;em.IR.J;em.IR.Kfloatnullablee_J-Ks? rms uncertainty on J-Ksmagstat.error;phot.color;em.IR.Jfloatnullablel_JmagLimit flag on Jmagmeta.code.errorcharJmag2MASS J magnitudemagphot.mag;em.IR.Jfloate_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.Jfloatnullablen_Jmag[a] a: H-only detection in 2MASSmeta.notecharSloanDisplay the SDSS data for this starmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharDR7Display the photometry from SDSS-DR7 for this starmeta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.main