J/ApJS/173/471ivo://CDS.VizieR/J/ApJS/173/471doi:10.26093/cds/vizier.21730471CDSMallery R.P.Rich R.M.Salim S.Small T.Charlot S.Seibert M.,Wyder T.Barlow T.A.Forster K.Friedman P.G.Martin D.C.Morrissey P.,Neff S.G.Schiminovich D.Bianchi L.Donas J.Heckman T.M.Lee Y.-W.,Madore B.F.Milliard B.Szalay A.S.Welsh B.Y.Yi S.2017-10-12T12:59:37Z2009-07-17T18:02:49ZCDS support team

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

cds-question@unistra.frline-intensitiesgalaxiesspectroscopyredshiftedultraviolet-astronomyWe report results from a pilot program to obtain spectroscopy for objects detected in the Galaxy Evolution Explorer (GALEX) Medium Imaging Survey (MIS). Our study examines the properties of galaxies detected by GALEX fainter than the Sloan Digital Sky Survey (SDSS) spectroscopic survey. This is the first study to extend the techniques of Salim and coworkers to estimate stellar masses, star formation rates (SFRs), and the b (star formation history) parameter for star-forming galaxies out to z~0.7. We obtain redshifts for 50 GALEX MIS sources reaching NUV=23.9 (AB mag) having counterparts in the SDSS Data Release 4 (DR4). Of our sample, 43 are star-forming galaxies with z<0.7, 3 have emission-line ratios indicative of active galactic nuclei with z<0.7, and 4 objects with z>1 are QSOs, 3 of which are not previously cataloged. We compare our sample to a much larger sample of ~50000 matched GALEX/SDSS galaxies with SDSS spectroscopy; while our survey is shallow, the optical counterparts to our sources reach ~3mag fainter in SDSS r than the SDSS spectroscopic sample. We use emission-line diagnostics for the galaxies to determine that the sample contains mostly star-forming galaxies.2007ApJS..173..471Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/173/471CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/133/1780 : GALEX/SDSS quasar catalog (Trammell+, 2007)J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+, 2007)J/ApJS/173/441 : UV-Luminous galaxies discovered by GALEX (Hoopes+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/173/471https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/173/471http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/173/471https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/173/471https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/173/471http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/173/471GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/173/471/table2 (Galaxies, Redshifts, Colors and Derived Parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/173/471/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/173/471/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/173/471/table2?GETtext/xml+votable180.050000true264.377837557.335750.0055555555555555566/10099 10105https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/173/471?format=asciiUVOpticaldefaultJ/ApJS/173/471/table2Galaxies, Redshifts, Colors and Derived ParametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpSimbad column added by the CDSmeta.ref.urlcharobjIDSDSS Object Identification numbermeta.id;meta.maincharprimaryzRedshiftsrc.redshiftfloatRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFUV? Far ultraviolet magnitude (1344-1786{AA})magphot.mag;em.UV.100-200nmfloatnullableNUVNear Ultraviolet magnitude (1771-2831{AA})magphot.mag;em.UVfloatNUV-rNUV-r color indexmagphot.color;em.UV;em.optfloatMass? log of the present-day Stellar Mass of the galaxylog(solMass)src.class.starGalaxyfloatnullableSFR? log of the current Star Formation Rate (SFR) average over the past 100Myrlog(solMass.yr**-1)phys.SFR;stat.meanfloatnullableb? log of the Scalo b-parameter defined as the ratio of the current SFR to the past time-averaged SFR (averaged over the estimated age, not Hubble time)stat.fit.paramfloatnullableSDSSDisplay the SDSS data for this galaxymeta.ref.urlcharJ/ApJS/173/471/table1Redshifts, Equivalent Widths, and Line Ratios for the Spectroscopic Samplee_EWNII? Error on [NII] EW0.1nmstat.errorfloatnullableEWOIII? The [OIII] (5007{AA}) EW0.1nmspect.line.eqWidth;em.line.OIIIfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintobjIDSDSS Object Identification numbermeta.id;meta.maincharzRedshiftsrc.redshiftfloatEWOII? The [OII] (3727{AA}) equivalent width0.1nmspect.line.eqWidthfloatnullablee_EWOII? Error on [OII] EW0.1nmstat.errorfloatnullableEWHb? The H{beta} equivalent width0.1nmspect.line.eqWidth;em.line.Hbetafloatnullablee_EWHb? Error on H{beta} EW0.1nmstat.errorfloatnullablee_EWOIII? Error on [OIII] EW0.1nmstat.errorfloatnullableEWHa? The H{alpha} equivalent width0.1nmspect.line.eqWidth;em.line.Halphafloatnullablee_EWHa? Error on H{alpha} EW0.1nmstat.errorfloatnullableEWNII? The [NII] (6584{AA}) equivalent width0.1nmspect.line.eqWidthfloatnullableOIII/Hb? Flux ratio of [OIII](5007{AA})/H{beta}phot.flux;arith.ratiofloatnullablee_OIII/Hb? Error on flux ratio of [OIII]/H{beta}stat.errorfloatnullableNII/Ha? Flux ratio of [NII](6584{AA})/H{alpha}phot.flux;arith.ratiofloatnullablee_NII/Ha? Error on flux ratio of [NII]/H{alpha}stat.errorfloatnullable