J/ApJ/705/68ivo://CDS.VizieR/J/ApJ/705/68doi:10.26093/cds/vizier.17050068CDSBertincourt B.Helou G.Appleton P.Ogle P.Lagache G.Brooke T.,Smith J.-D.Sheth K.Dale D.Harwit M.Puget J.-L.Roussel H.2017-06-29T08:55:44Z2011-12-13T09:21:14ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyinfrared-sourcesredshiftedWe carried out an unbiased, spectroscopic survey using the low-resolution module of the infrared spectrograph (IRS) onboard Spitzer targeting two 2.6 square arcminute regions in the GOODS-North field. The IRS was used in a spectral mapping mode with 5hr of effective integration time per pixel. One region was covered between 14 and 21um and the other between 20 and 35um. We extracted spectra for 45 sources. About 84% of the sources have reported detections by GOODS at 24um, with a median f_{nu}_(24um)~100uJy. All but one source are detected in all four IRAC bands, 3.6 to 8um. We use a new cross-correlation technique to measure redshifts and estimate IRS spectral types; this was successful for ~60% of the spectra. Fourteen sources show significant polycyclic aromatic hydrocarbon emission, four mostly SiO absorption, eight present mixed spectral signatures (low PAH and/or SiO) and two show a single line in emission. For the remaining 17, no spectral features were detected. Redshifts range from z~0.2 to z~2.2, with a median of 1. IR luminosities are roughly estimated from 24um flux densities, and have median values of 2.2x10^11^L_{sun}_ and 7.5x10^11^L_{sun}_ at z~1 and z~2, respectively. This sample has fewer active galactic nuclei than previous faint samples observed with the IRS, which we attribute to the fainter luminosities reached here.2009ApJ...705...68Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/705/68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)J/A+A/528/A35 : Infrared luminosity in GOODS fields (Magnelli+, 2011)J/ApJS/187/251 : Ultradeep Ks imaging in the GOODS-N (Wang+, 2010)J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008)J/ApJ/666/863 : GOODS MIPS early-type galaxies (Van Der Wel+, 2007)J/MNRAS/371/1891 : GOODS ELAIS-N1 24um flux densities (Rodighiero+, 2006)J/ApJ/653/1004 : Galaxies at 1.4<~z<~3.0 in GOODS-North Field (Reddy+, 2006)J/ApJ/634/128 : 16{mu}m imaging around the HDF-N (Teplitz+, 2005)J/AJ/127/3121 : TKRS catalog of GOODS-North Field (Wirth+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/705/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/705/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/705/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/705/68https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/705/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/705/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/705/68/suuss (Source extraction information and Spitzer multi-wavelength data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/705/68/suuss?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/705/68/suuss?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/705/68/suuss?GETtext/xml+votable180.050000true189.1756862.289630.0055555555555555566/112526.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/705/68?format=asciiOpticalInfrareddefaultJ/ApJ/705/68/suussSource extraction information and Spitzer multi-wavelength datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXSimbad column added by the CDSmeta.ref.urlcharSUUSSSource numbermeta.idintprimaryf_SUUSS[d] Flag on SUUSS 9 (1)meta.codecharFieldField (LL1: IRS low-resolution (20-35um) or LL2: IRS low-resolution (14-21um))meta.id;obs.fieldcharS/NSignal to noise ratio estimation (2)stat.snrfloatS/NpkMaximum S/N (3)umstat.snrfloatWpkWavelength at which the spectrum peaks (3)umem.wlfloatDelLContracted spectral bandwidth over which the spectra have flux densities higher than 2{sigma}umem.wlfloatS3.6? Spitzer/IRAC 3.6um band flux (4)uJyphot.mag;em.IR.3-4umfloatnullablee_S3.6? S3.6 uncertaintyuJystat.errorfloatnullableS4.5? Spitzer/IRAC 4.5um band flux (4)uJyphot.mag;em.IR.4-8umfloatnullablee_S4.5? S4.5 uncertaintyuJystat.errorfloatnullableS5.8? Spitzer/IRAC 5.8um band flux (4)uJyphot.flux.density;em.IR.4-8umfloatnullablee_S5.8? S5.8 uncertaintyuJystat.errorfloatnullableS8.0? Spitzer/IRAC 8um band flux (4)uJyphot.flux.density;em.IR.8-15umfloatnullablee_S8.0? S8.0 uncertaintyuJystat.errorfloatnullableS24? Spitzer/MIPS 24um band flux (5)uJyphot.flux.density;em.IR.15-30umfloatnullablee_S24? S24 uncertaintyuJystat.errorfloatnullableGOODSDisplay the GOODS initial results catalog within 1.5" (Giavalisco et al. 2004, Cat. II/261)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from NED (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from NED (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/705/68/table4Cross-correlation analysis resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSUUSSSource numbermeta.idintf_SUUSS[c] no conclusive identification (1)meta.codecharField[1/2] Field number (1: LL1 or 2: LL2)meta.id;obs.fieldintzIRS? Redshift from Spitzer/IRSsrc.redshift;pos.heliocentricfloatnullablez? Redshift from litteraturesrc.redshiftfloatnullabler_z[P/S]? Code reference for z (2)meta.ref;pos.framecharTemplateTemplate (galaxy prototype or PAH-class)meta.notecharSpTSpectral characterisation (3)src.spTypechar