J/A+A/497/81ivo://CDS.VizieR/J/A+A/497/81doi:10.26093/cds/vizier.34970081CDSBoutsia K.Leibundgut B.Trevese D.Vagnetti F.2017-10-13T15:41:43Z2009-11-03T16:43:41ZCDS support team

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

cds-question@unistra.frsurveysactive-galactic-nucleix-ray-sourcesredshiftedSupermassive black holes with masses of 10^5^-10^9^M_{sun}_ are believed to inhabit most, if not all, nuclear regions of galaxies, and both observational evidence and theoretical models suggest a scenario where galaxy and black hole evolution are tightly related. Luminous AGNs are usually selected by their non-stellar colours or their X-ray emission. Colour selection cannot be used to select low-luminosity AGNs, since their emission is dominated by the host galaxy. Objects with low X-ray to optical ratio escape even the deepest X-ray surveys performed so far. In a previous study we presented a sample of candidates selected through optical variability in the Chandra Deep Field South, where repeated optical observations were performed in the framework of the STRESS supernova survey. The analysis is devoted to breaking down the sample in AGNs, starburst galaxies, and low-ionisation narrow-emission line objects, to providing new information about the possible dependence of the emission mechanisms on nuclear luminosity and black-hole mass, and eventually studying the evolution in cosmic time of the different populations.2009A&A...497...81Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/497/81CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/488/73 : Variability-selected AGN in Chandra DFS (Trevese+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/497/81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/497/81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/497/81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/497/81https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/497/81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/497/81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/497/81/table1 (Catalogue of variable sources observed during our spectroscopic follow-up)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/497/81/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/497/81/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/497/81/table1?GETtext/xml+votable180.050000true53.335875-27.81947220.005555555555555556Cone search capability for table J/A+A/497/81/table2 (Catalogue of extragalactic variable objects in the AXAF field with spectroscopic redshift)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/497/81/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/497/81/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/497/81/table2?GETtext/xml+votable180.050000true53.335875-27.81947220.0055555555555555566/35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/497/81?format=asciiX-rayOpticaldefaultJ/A+A/497/81/table1Catalogue of variable sources observed during our spectroscopic follow-upz? Redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[TBV2008]Sequential numbermeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatAVmagV_min-V_max_ amplitudemagsrc.var.amplitudefloatTexpExposure timestime.duration;obs.exposureintAirmassAirmassobs.airMassfloatClSpectroscopic class (G1)src.classcharPapIDisplay data from paper I (Trevese et al. 2008, Cat. J/A+A/488/73)meta.ref.urlcharJ/A+A/497/81/table2Catalogue of extragalactic variable objects in the AXAF field with spectroscopic redshiftrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_[TBV2008]Simbad column added by the CDSmeta.ref.urlchar[TBV2008]Sequential numbermeta.recordintprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmag1V magnitude (from paper I, J/A+A/488/73)magphot.mag;em.opt.VfloatsigStandard deviation of the light curve (from paper I, J/A+A/488/73)magstat.stdev;phot.magfloatsig*Normalised standard deviation of the light curve (1)magstat.stdev;phot.magfloatVmag? EIS V magnitude, AB systemmagphot.mag;em.opt.VfloatnullableRmag? EIS R magnitude, AB systemmagphot.mag;em.opt.Rfloatnullable(U-B)? EIS U-B colour index, AB systemmagphot.color;em.opt.U;em.opt.Bfloatnullable(B-V)? EIS B-V colour index, AB systemmagphot.color;em.opt.B;em.opt.VfloatnullableS/G? EIS Stellarity index in the V bandsrc.class.starGalaxyfloatnullable[WDK2001]? COMBO-17 identification numbermeta.idintnullableCClCOMBO class (Wolf et al. 2004, Cat. II/253) (2)src.classcharz? Spectroscopic redshiftsrc.redshiftfloatnullableClSpectroscopic class (G1)src.classchar[LBA2005]? X-ray identification from Lehmer et al. (2005, Cat. J/ApJS/161/21)meta.idintnullablel_FXLimit flag on FXmeta.code.errorcharFX? X-ray flux in the 2-8keV bandmW.m**-2phot.flux;em.X-raydoublenullablel_logLXLimit flag on logLXmeta.code.errorcharlogLX? X-ray luminosity in the 2-8keV bandlog(1e-07W)phys.luminosity;em.X-rayfloatnullablelogLR? R-band luminositylog(1e-07W)phys.luminosityfloatnullablel_log(X/O)Limit flag on log(X/O)meta.code.errorcharlog(X/O)? X-ray-to-optical flux ratiophys.luminosity;arith.ratiofloatnullableNotesNotes (3)meta.notecharPapIDisplay data from paper I (Trevese et al. 2008, Cat. J/A+A/488/73)meta.ref.urlcharEISEIS name (JHHMMSS.ss+DDMMSS.s)meta.idchar