J/MNRAS/440/3430ivo://CDS.VizieR/J/MNRAS/440/3430doi:10.26093/cds/vizier.74403430CDSDavenport J.R.A.Ivezic Z.Becker A.C.Ruan J.J.Hunt-Walker N.M.,Covey K.R.Lewis A.R.Alsayyad Y.Anderson L.M.2024-08-08T20:13:17Z2017-06-12T08:51:36ZCDS support team

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

cds-question@unistra.frsurveysvisible-astronomysloan-photometryinfrared-photometrytwo-color-diagramsWe present the fiducial main-sequence stellar locus traced by 10 photometric colours observed by Sloan Digital Sky Survey (SDSS), Two Micron All Sky Survey (2MASS), and Wide-field Infrared Survey Explorer} (WISE). Median colours are determined using 1052 793 stars with r-band extinction less than 0.125. We use this locus to measure the dust extinction curve relative to the r band, which is consistent with previous measurements in the SDSS and 2MASS bands. The WISE band extinction coefficients are larger than predicted by standard extinction models. Using 13 lines of sight, we find variations in the extinction curve in H, Ks, and WISE bandpasses. Relative extinction decreases towards Galactic anticentre, in agreement with prior studies. Relative extinction increases with Galactic latitude, in contrast to previous observations. This indicates a universal mid-IR extinction law does not exist due to variations in dust grain size and chemistry with Galactocentric position. A preliminary search for outliers due to warm circumstellar dust is also presented, using stars with high signal-to-noise ratio in the W3 band. We find 199 such outliers, identified by excess emission in Ks-W3. Inspection of SDSS images for these outliers reveals a large number of contaminants due to nearby galaxies. Six sources appear to be genuine dust candidates, yielding a fraction of systems with infrared excess of 0.12+/-0.05 per cent.2014MNRAS.440.3430Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/440/3430CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/328 : AllWISE Data Release (Cutri+ 2013)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/440/3430https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/440/3430http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/440/3430https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/440/3430https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/440/3430http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/440/3430GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/MNRAS/440/3430/table1Optical and NIR colour locus as a function of g-i colour binsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintg-ig-i colour indexmagphot.color;em.opt.B;em.opt.IfloatNstarNumber of stars in each binmeta.numberintu-gu-g colour indexmagphot.color;em.opt.U;em.opt.Bfloate_u-grms uncertainty on u-gmagstat.errorfloatg-rg-r colour indexmagphot.color;em.opt.B;em.opt.Rfloate_g-rrms uncertainty on g-rmagstat.error;phot.color;em.opt.Bfloatr-ir-i colour indexmagphot.color;em.opt.R;em.opt.Ifloate_r-irms uncertainty on r-imagstat.error;phot.color;em.opt.Rfloati-zi-z colour indexmagphot.color;em.opt.I;em.opt.Ifloate_i-zrms uncertainty on i-zmagstat.errorfloatz-Jz-J colour indexmagphot.color;em.opt;em.IRfloate_z-Jrms uncertainty on z-Jmagstat.errorfloatJ-HJ-H colour indexmagphot.color;em.IR.J;em.IR.Hfloate_J-Hrms uncertainty on J-Hmagstat.error;phot.color;em.IR.JfloatH-KsH-Ks colour indexmagphot.color;em.IR.H;em.IR.Kfloate_H-Ksrms uncertainty on H-Ksmagstat.error;phot.color;em.IR.HfloatJ/MNRAS/440/3430/table2The mid-IR colour locus as a function of g-i colourrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintg-ig-i colour indexmagphot.color;em.opt.B;em.opt.IfloatNstarsNumber of stars in each bin from the primary samplemeta.numberintKs-W1Ks-W1 colour indexmagphot.color;em.IR;em.IRfloate_Ks-W1rms uncertainty on Ks-W1magstat.errorfloatW1-W2W1-W2 colour indexmagphot.color;em.IR;em.IRfloate_W1-W2rms uncertainty on W1-W2magstat.errorfloatNStarsW3Number of stars in each bin from the W3-limited subsamplemeta.numberintW2-W3? W2-W3 colour indexmagphot.color;em.IR;em.IRfloatnullablee_W2-W3? rms uncertainty on W2-W3magstat.errorfloatnullable