J/ApJS/235/16ivo://CDS.VizieR/J/ApJS/235/16doi:10.26093/cds/vizier.22350016CDSBai YuLiu J.Wicker J.Wang S.Guo J.Qin Y.He L.Wang J.Wu Y.,Dong Y.Zhang Y.Hou Y.Wang Y.Cao Z.2019-01-22T13:25:29Z2018-12-04T15:34:27ZCDS support team

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

cds-question@unistra.frultraviolet-photometryinfrared-photometryextinctionstellar-spectral-typeseffective-temperaturewhite-dwarf-starsWe present the ultraviolet magnitudes for over three million stars in the LAMOST survey, in which 2,202,116 stars are detected by GALEX. For 889,235 undetected stars, we develop a method to estimate their upper limit magnitudes. The distribution of (FUV-NUV) shows that the color declines with increasing effective temperature for stars hotter than 7000K in our sample, while the trend disappears for the cooler stars due to upper atmosphere emission from the regions higher than their photospheres. For stars with valid stellar parameters, we calculate the UV excesses with synthetic model spectra, and find that the (FUV - NUV) versus R'_FUV_ can be fitted with a linear relation and late-type dwarfs tend to have high UV excesses. There are 87,178 and 1,498,103 stars detected more than once in the visit exposures of GALEX in the FUV and NUV, respectively. We make use of the quantified photometric errors to determine statistical properties of the UV variation, including intrinsic variability and the structure function on the timescale of days. The overall occurrence of possible false positives is below 1.3% in our sample. UV absolute magnitudes are calculated for stars with valid parallaxes, which could serve as a possible reference frame in the NUV. We conclude that the colors related to UV provide good criteria to distinguish between M giants and M dwarfs, and the variability of RR Lyrae stars in our sample is stronger than that of other A and F stars.2018ApJS..235...16Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/235/16CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)II/328 : AllWISE Data Release (Cutri+ 2013)V/146 : LAMOST DR1 catalogs (Luo+, 2015)V/149 : LAMOST DR2 catalogs (Luo+, 2016)II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)V/153 : LAMOST DR4 catalogs (Luo+, 2018)J/AJ/130/825 : GALEX ultraviolet variability catalog (Welsh+, 2005)J/ApJS/173/673 : M dwarf UV flares in GALEX (Welsh+, 2007)J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)J/AJ/136/259 : 2nd GALEX UV variability catalog (GUVV-2) (Wheatley+, 2008)J/ApJ/703/614 : UV star-forming regions in M31 (Kang+, 2009)J/ApJ/708/717 : Light curve templates of RR Lyrae stars (Sesar+, 2010)J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011)J/ApJ/765/154 : RR Lyrae stars in the Catalina Sky Survey (Drake+, 2013)J/ApJ/766/60 : GALEX Time Domain Survey I. UV var. sources (Gezari+, 2013)J/AJ/146/34 : IR photometry of DA white dwarfs from LAMOST (Zhang+, 2013)J/MNRAS/433/3398 : WD main-sequence binaries (Rebassa-Mansergas+, 2013)J/ApJ/766/9 : GALEX observations of exoplanet host stars (Shkolnik, 2013)J/MNRAS/431/2063 : UV/X-ray activity of M dwarfs within 10pc (Stelzer+, 2013)J/MNRAS/441/1230 : RRLyr stars in the Catalins Sky Survey (CS2) (Abbas+, 2014)J/A+A/570/A107 : WDMS from LAMOST DR1 (Ren+, 2014)J/MNRAS/445/2758 : KIC giants Bayesian dist. and extinctions (Rodrigues+ 2014)J/ApJ/793/62 : Triangulum-Andromeda stellar properties (Sheffield+, 2014)J/ApJ/798/41 : GALEX NUV obs. of bright M-type stars (Ansdell+, 2015)J/ApJ/813/100 : Deep GALEX NUV survey of Kepler field. I. (Olmedo+, 2015)J/MNRAS/448/822 : LAMOST candidate members of star clusters (Xiang+, 2015)J/MNRAS/452/765 : WD candidates using LAMOST DR3 (Gentile Fusillo+, 2015)J/MNRAS/454/2787 : LAMOST DR2 white dwarfs (Guo+, 2015)J/other/RAA/15.1154 : M-giant star candidates in LAMOST DR 1 (Zhong+, 2015)J/ApJ/817/1 : Palomar/MSU & SDSS-DR7 M dwarfs with GALEX (Jones+, 2016)J/MNRAS/460/3179 : APOGEE stars distance and extinction (Wang+, 2016)J/other/RMxAA/53.439 : Gaia stars with GALEX NUV excess (Makarov, 2017)http://www.galex.caltech.edu/ : GALEX home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/235/16https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/235/16http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/235/16https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/235/16https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/235/16http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/235/16GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/235/16/targets (List of targets; table added by CDS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/235/16/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/235/16/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/235/16/targets?GETtext/xml+votable180.050000true332.471576-2.0850150.0055555555555555562/19 3/0 17 32 34 37 40 41 42 68 73 74 81 82 84 88 97 101 109 113 128 129 134 140 142 146 150 161 162 171 295 311 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32726 32727 36671 36710 36711 36714 36715 36722 36723 36726 36757 36759 36765 36767 36794 36824 36825 36826 36828 36829 36831 36832 36833 36836 36837 36839 36842 36843 36852 36854 36855 40797 40858 40859 40862 40863 40869 40871 40877 40893 40894 40895 40902 40903 40913 40915 44979 44982 44983 45017 45019 45026 45041 45042 45043 48981 48982 48983 48997 48998 48999 49001 49003 49013 49014 49015 49108 49109 49110 49112 49113 49141https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/235/16?format=asciiUVInfrareddefaultJ/ApJS/235/16/targetsList of targets; table added by CDSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNuvNumber of UV observations for this source (link to table 2)meta.ref.urlintnullableObsID[101002/351115238] ObsID in the LAMOST DR3 catalogmeta.id;meta.mainlongprimaryWDWhite dwarf-main sequence candidate (link to table 3)meta.ref.urlintnullableSpTSpectral typessrc.spTypecharTeff[2544/40000] Effective temperatures from the AFGK catalog or estimated with the stellar subclassesKphys.temperatureintlogg[0.02/5]? Surface gravitylog(cm.s**-2)phys.gravityfloatnullableAfuv[0/21.6] Extinction in the FUVmagphys.absorptionfloatAnuv[0/32] Extinction in the NUVmagphys.absorptionfloatfE[0/1] Flags of extinction (calculated with 0=the RJCE method or 1=Bayesian method)meta.codeintLAMOSTLAMOST identifier (JHHMMSS.ss+DDMMSS.s) from DR4 or DR2; blank if object from DR3meta.idcharRAJ2000[0/360] Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-10/63] Declination (J2000)degpos.eq.dec;meta.mainindexedUVeDisplay the UV parameters for this star (table 2)meta.ref.urlcharDR4+DR2Display data from the LAMOST DR4 (V/153) and DR2 (V/149) catalogsmeta.ref.urlcharJ/ApJS/235/16/table1UV data in our catalogSpTSpectral typessrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[101002/351115238] ObsID in the LAMOST DR3 catalogmeta.id;meta.mainlongTeff[2544/40000]? Effective temperatures (1)Kphys.temperatureintnullablelogg[0.02/5]? Surface Gravitylog(cm.s**-2)phys.gravityfloatnullableAfuv[0/21.6]? Extinction in the FUVmagphys.absorptionfloatnullableAnuv[0/32]? Extinction in the NUVmagphys.absorptionfloatnullablefE[0/1]? Flags of extinction (2)meta.codeintnullableJD[2798.1/5964.1] Julian date of observation; JD-2450000dtime.epochdoublelFUVvis[14.5/25.1]? FUV upper limit magnitudes from visit exposuresmagphot.mag;em.UV.100-200nm;stat.maxfloatnullablelNUVvis[-9.6/25.5]? NUV upper limit magnitudes from visit exposuresmagphot.mag;em.UV.200-300nm;stat.maxfloatnullablefC[0/26] Visit exposures flag (3)meta.codeintFUVvis[8.8/24.7]? FUV magnitudes from visit exposuresmagphot.mag;em.UV.100-200nmfloatnullablee_FUVvis[0/35]? Errors for FUVvismagstat.errorfloatnullableNUVvis[-4.2/29.6]? FUV magnitudes from visit exposuresmagphot.mag;em.UV.200-300nmfloatnullablee_NUVvis[0/68]? Errors for NUVvismagstat.errorfloatnullablemark1Counterpart flag for visit exposures (4)meta.codecharf_FUVvis[0/1]? Artifact flag for FUVvis (5)meta.codeintnullablef_NUVvis[0/1]? Artifact flag for NUVvis (5)meta.codeintnullablelFUV[14.5/25.1]? FUV upper limit magnitudes from co-added exposuresmagphot.mag;em.UV.100-200nm;stat.maxfloatnullablelNUV[-9.3/25.5]? NUV upper limit magnitudes from co-added exposuresmagphot.mag;em.UV.200-300nm;stat.maxfloatnullableFUV[9.3/26]? FUV magnitude from co-added exposuresmagphot.mag;em.UV.100-200nmfloatnullablee_FUV[0/35]? Errors for FUVmagstat.errorfloatnullableNUV[-4.1/27]? NUV magnitude from co-added exposuresmagphot.mag;em.UV.200-300nmfloatnullablee_NUV[0/27]? Errors for NUVmagstat.errorfloatnullablemark2Counterpart flag for co-added exposures (4)meta.codecharJ/ApJS/235/16/table2UV parameters in our catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[101008/351115238] ObsID in the LAMOST DR3 catalogmeta.id;meta.mainlongEFUV[-24/4.1]? Excesses in the FUVmagphot.color.excess;em.UV.100-200nmfloatnullablee_EFUV[0.07/17.3]? Errors of EFUVmagstat.errorfloatnullableENUV[-19.8/7.8]? Excesses in the NUVmagphot.color.excess;em.UV.200-300nmfloatnullablee_ENUV[0.02/22.1]? Errors of ENUVmagstat.errorfloatnullableRFUV[-11.1/-1.4]? Normalized FUV excessesphot.color.excess;em.UV.100-200nmfloatnullablee_RFUV[-9.5/7.5]? Errors of RFUVstat.errorfloatnullableRNUV[-12/3.4]? Normalized NUV excessesphot.color.excess;em.UV.200-300nmfloatnullablee_RNUV[-9.2/11.3]? Errors of RNUVstat.errorfloatnullableSigFUV[0/4.8]? Intrinsic variabilities in the FUVmagsrc.var.amplitude;em.UV.100-200nmfloatnullableSigNUV[0/4]? Intrinsic variabilities in the NUVmagsrc.var.amplitude;em.UV.100-200nmfloatnullableSdFUV[0/5.8]? Structure functions on timescales of days, FUV (1344-1768{AA})magsrc.var.index;em.UV.100-200nmfloatnullableSdNUV[0/5.1]? Structure functions on timescales of days, NUV (1771-2831{AA})magsrc.var.index;em.UV.200-300nmfloatnullableJ/ApJS/235/16/table3White dwarf-main sequence (WDMS) candidates in our cataloge_W1mag[0.02/0.3]? Errors of the W1magstat.error;phot.magfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[102042/351112222] ObsID in the LAMOST DR3 catalogmeta.id;meta.mainlongFUVmag[10.8/24.3] FUV (1344-1768{AA}) mean magnitude corrected for extinction (1)magphot.mag;em.UV.100-200nmfloate_FUVmag[0/7] Errors of the FUV (1)magstat.error;phot.mag;em.UV.100-200nmfloatNUVmag[9.4/24.2] NUV (1771-2831{AA}) mean magnitude corrected for extinction (1)magphot.mag;em.UV.200-300nmfloate_NUVmag[0/7.7] Errors of the NUV (1)magstat.error;phot.mag;em.UV.200-300nmfloatW1mag[6.6/17.3] AllWISE W1-band (3.4um) magnitude corrected for extinctionmagphot.mag;em.IR.3-4umfloatW2mag[6.8/17.3] AllWISE W2-band (4.6um) magnitude corrected for extinctionmagphot.mag;em.IR.4-8umfloate_W2mag[0.02/0.4]? Errors of the W2magstat.error;phot.magfloatnullable