J/A+A/457/79ivo://CDS.VizieR/J/A+A/457/79doi:10.26093/cds/vizier.34570079CDSGavignaud I.Bongiorno A.Paltani S.Mathez G.Zamorani G.Moller P.,Picat J.P.Le Brun V.Marano B.Le Fevre O.Bottini D.Garilli B.,Maccagni D.Scaramella R.Scodeggio M.Tresse L.Vettolani G.,Zanichelli A.Adami C.Arnaboldi M.Arnouts S.Bardelli S.,Bolzonella M.Cappi A.Charlot S.Ciliegi P.Contini T.Foucaud S.,Franzetti P.Guzzo L.Ilbert O.Iovino A.Mccracken H.J.Marinoni C.,Mazure A.Meneux B.Merighi R.Pello R.Pollo A.Pozzetti L.,Radovich M.Zucca E.Bondi M.Busarello G.Cucciati O.De La Torre S.,Gregorini L.Lamareille F.Mellier Y.Merluzzi P.Ripepi V.Rizzo D.,Vergani D.2007-07-10T12:09:02Z2007-07-10T12:06:28ZCDS support team

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

cds-question@unistra.frsurveysactive-galactic-nucleiredshiftedinfrared-photometryvisible-astronomybroad-band-photometryWe present the type-1 active galactic nuclei (AGN) sample extracted from the VIMOS VLT Deep Survey's first observations of 21000 spectra in 1.75{deg}^2^. This sample, which is purely magnitude-limited and free of morphological or color-selection biases, contains 130 broad-line AGN (BLAGN) spectra with redshift up to 5. Our data are divided into a wide (I_AB_<=22.5) and a deep (I_AB_<=24) subsample containing 56 and 74 objects, respectively. Because of its depth and selection criteria, this sample is uniquely suited for studying the population of faint type-1 AGN. Our measured surface density (~472+/-48 BLAGN per square degree with I_AB_<=24) is significantly higher than that of any other optically selected sample of BLAGN with spectroscopic confirmation. By applying a morphological and color analysis to our AGN sample, we find that (1) ~23% of the AGN brighter than I_AB_=22.5 are classified as extended, and this percentage increases to ~42 for those with z<1.6; (2) a non-negligible fraction of our BLAGN are lying close to the color-space area occupied by stars in the u*-g' versus g'-r' color-color diagram. This leads us to the conclusion that the classical optical-ultraviolet preselection technique, if employed at such deep magnitudes (I_AB_=22.5) in conjuction with a preselection of point-like sources, can miss up to ~35% of the AGN population. Finally, we present a composite spectrum of our sample of objects. While the continuum shape is very similar to that of the SDSS composite at short wavelengths, it is much redder than that of the SDSS composite at {lambda}>=3000{AA}. We interpret this as due to significant contamination from emission of the host galaxies, as expected from the faint absolute magnitudes sampled by our survey.2006A&A...457...79Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/457/79CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/457/79https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/457/79http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/457/79https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/457/79https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/457/79http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/457/79GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/457/79/tablea1 (Broad-line AGN (BLAGN) with secure redshift (flags 14 and 13))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/457/79/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/457/79/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/457/79/tablea1?GETtext/xml+votable180.050000true53.156125-27.66675830.005555555555555556Cone search capability for table J/A+A/457/79/tablea2 (BLAGN with a single emission line detected and more than one possible redshift (flag 19))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/457/79/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/457/79/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/457/79/tablea2?GETtext/xml+votable180.050000true53.2405833-27.73058890.0055555555555555566/17686 17689 17692 19033 19035-19036 19038 27250 27256-27257 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/457/79?format=asciiOpticalInfrareddefaultJ/A+A/457/79/tablea1Broad-line AGN (BLAGN) with secure redshift (flags 14 and 13)FieldFieldmeta.id;obs.fieldcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[dw] deep (d, I_AB_<=22.5) or wide (w, I_AB_<=24) samplesrc.samplecharNagnNumber of AGN in the fieldmeta.numberintVVDSObject designation numbermeta.id;meta.mainlongRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatFlag[13,14] BLAGN flag (1)meta.code.errorintn_Flag[SF] Note on Flag (2)meta.notecharImagI magnitude in AB systemmagphot.mag;em.opt.IfloatBmag? B magnitude in AB systemmagphot.mag;em.opt.BfloatnullableVmag? V magnitude in AB systemmagphot.mag;em.opt.VfloatnullableRmag? R magnitude in AB systemmagphot.mag;em.opt.RfloatnullableMorphMorphological classification for objects with I_AB_<22.5 (G1)src.morphcharXResults from Szokoly et al. 2004 (Cat. J/ApJS/155/271)meta.ref.urlcharJ/A+A/457/79/tablea2BLAGN with a single emission line detected and more than one possible redshift (flag 19)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldFieldmeta.id;obs.fieldcharSample[dw] deep (d, I_AB_<=22.5) or wide (w, I_AB_<=24) samplesrc.samplecharNagnNumber of AGN in the fieldmeta.numberintVVDSObject designation numbermeta.id;meta.mainlongRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainlambdaWavelength observed0.1nmem.wlintz1Redshift solutionsrc.redshiftfloatn_z1[a-d] identification of the emission line (1)meta.notecharz2Redshift solutionsrc.redshiftfloatn_z2[a-d] identification of the emission line (1)meta.notecharz3? Redshift solutionsrc.redshiftfloatnullablen_z3[a-d] identification of the emission line (1)meta.notecharz4? Redshift solutionsrc.redshiftfloatnullablen_z4[a-d] identification of the emission line (1)meta.notecharImagI magnitude in AB systemmagphot.mag;em.opt.IfloatBmag? B magnitude in AB systemmagphot.mag;em.opt.BfloatnullableVmag? V magnitude in AB systemmagphot.mag;em.opt.VfloatnullableRmag? R magnitude in AB systemmagphot.mag;em.opt.RfloatnullableMorphMorphological classification for objects with I_AB_<22.5 (G1)src.morphchar