J/ApJ/749/65ivo://CDS.VizieR/J/ApJ/749/65doi:10.26093/cds/vizier.17490065CDSGonzalez-Nuevo J.Lapi A.Fleuren S.Bressan S.Danese L.De Zotti G.,Negrello M.Cai Z.-Y.Fan L.Sutherland W.Baes M.Baker A.J.,Clements D.L.Cooray A.Dannerbauer H.Dunne L.Dye S.Eales S.,Frayer D.T.Harris A.I.Ivison R.Jarvis M.J.Michalowski M.J.,Lopez-Caniego M.Rodighiero G.Rowlands K.Serjeant S.Scott D.,van der Werf P.Auld R.Buttiglione S.Cava A.Dariush A.Fritz J.,Hopwood R.Ibar E.Maddox S.Pascale E.Pohlen M.Rigby E.Smith D.,Temi P.2018-01-05T08:56:40Z2013-12-09T08:34:06ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesvisible-astronomysloan-photometryinfrared-photometryredshiftedgravitational-lensingmillimeter-astronomysubmillimeter-astronomyWhile the selection of strongly lensed galaxies (SLGs) with 500{mu}m flux density S_500_>100mJy has proven to be rather straightforward, for many applications it is important to analyze samples larger than the ones obtained when confining ourselves to such a bright limit. Moreover, only by probing to fainter flux densities is it possible to exploit strong lensing to investigate the bulk of the high-z star-forming galaxy population. We describe HALOS (the Herschel-ATLAS Lensed Objects Selection), a method for efficiently selecting fainter candidate SLGs, reaching a surface density of =~1.5-2/deg^2^, i.e., a factor of about 4-6 higher than that at the 100mJy flux limit. HALOS will allow the selection of up to ~1000 candidate SLGs (with amplifications {mu}>~2) over the full H-ATLAS survey area. Applying HALOS to the H-ATLAS Science Demonstration Phase field (=~14.4deg^2^) we find 31 candidate SLGs, whose candidate lenses are identified in the VIKING near-infrared catalog. Using the available information on candidate sources and candidate lenses we tentatively estimate a =~72% purity of the sample. As expected, the purity decreases with decreasing flux density of the sources and with increasing angular separation between candidate sources and lenses. The redshift distribution of the candidate lensed sources is close to that reported for most previous surveys for lensed galaxies, while that of candidate lenses extends to redshifts substantially higher than found in the other surveys. The counts of candidate SLGs are also in good agreement with model predictions. Even though a key ingredient of the method is the deep near-infrared VIKING photometry, we show that H-ATLAS data alone allow the selection of a similarly deep sample of candidate SLGs with an efficiency close to 50%; a slightly lower surface density (=~ 1.45/deg2) can be reached with a ~70% efficiency.2012ApJ...749...65Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/749/65CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/72 : CLASS survey of radio sources (Myers+, 2003)J/ApJ/749/38 : CFHTLS-SL2S-ARCS strong lens candidates (More+, 2012)J/ApJ/744/150 : Dust-obscured galaxies (DOGs) at z=~2 (Bussmann+, 2012)J/MNRAS/421/3027 : Statisical study of galaxy dust emissions (Bourne+, 2012)J/ApJ/719/763 : Millimeter-wave sources in the SPT survey (Vieira+, 2010)J/ApJ/705/1099 : The Sloan Lens ACS (SLACS) Survey. IX. (Auger+, 2009)J/ApJ/706/1364 : SINS survey of high-z galaxies (Forster Schreiber+, 2009)J/ApJS/176/19 : COSMOS: strong lens systems (Faure+, 2008)J/AJ/132/999 : SDSS quasar lens search (Oguri+, 2006)J/ApJ/566/945 : Massive star forming regions at 1.2mm (Beuther+, 2002)http://www.h-atlas.org/ : Herschel ATLAS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/749/65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/749/65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/749/65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/749/65https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/749/65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/749/65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/749/65/table1 (The parent sample of lens candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/65/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/65/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/65/table1?GETtext/xml+votable180.050000true136.916667-0.70.0055555555555555565/1024 6826 6/4100 4101 4102 27297 27298 27299 27300 27302 27308 40951 40957 409593.2031150387835462e-22 9.264782775159061e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/749/65?format=asciiInfraredOpticalRadiodefaultJ/ApJ/749/65/table1The parent sample of lens candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintH-ATLASH-ATLAS designation (JHHMMSS.s+DDMMSS)meta.id;meta.maincharf_H-ATLAS[*] *: strongly lensed galaxy (SLG) candidatemeta.codecharSDP[9/910] H-ATLAS Science Demonstration Phase (SDP) field identification numbermeta.idintn_SDP[a-c,N ] Notes on candidates (1)meta.notecharS500[44/249] Herschel/SPIRE 500um flux densitymJyphot.flux.density;em.mm.400-750GHzinte_S500[9/10] S500 uncertaintymJystat.errorintS350[85/403] Herschel/SPIRE 350um flux densitymJyphot.flux.density;em.mm.750-1500GHzinte_S350[8] S350 uncertaintymJystat.errorintS250[66/507] Herschel/SPIRE 250um flux densitymJyphot.flux.density;em.mm.750-1500GHzinte_S250[7] S250 uncertaintymJystat.errorintz[1.32/3.04] Redshift of the sourcesrc.redshiftfloate_z[0.01/0.6] z uncertaintystat.error;src.redshiftfloatlogL100[26.77/27.6] Log of 100um luminosity (L_100um_)W/Hzphys.luminosity;em.IR.60-100umfloate_logL100[0.27/0.45] logL100 uncertaintyW/Hzstat.errorfloatzlens[-0.02/1.78]? Lens redshiftsrc.redshift;pos.heliocentricfloatnullablee_zlens[0.01/0.42]? zlens uncertaintystat.errorfloatnullabler_zlens[SVH ] Lens redshift origin (2)meta.ref;pos.framechar(g-r)[0/3.32]? SDSS (g-r) color indexphot.color;em.opt.B;em.opt.Rfloatnullable(Z-H)[0/2.35]? VIKING (Z-H) color indexphot.color;em.IR;em.IRfloatnullableDelta[0/9.43]? Angular separation between candidate source and candidate lens ({Delta}pos)arcsecpos.angDistancefloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from H-ATLAS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from H-ATLAS names (declination part)degpos.eq.dec;meta.main