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dc.contributor.author
Lilly, Simon J.
dc.contributor.author
Fevre, O.L.
dc.contributor.author
Renzini, A.
dc.contributor.author
Zamorani, Gianni
dc.contributor.author
Scodeggio, M.
dc.contributor.author
Contini, T.
dc.contributor.author
Carollo, C. Marcella
dc.contributor.author
Hasinger, G.
dc.contributor.author
Kneib, J.-P.
dc.contributor.author
Iovino, A.
dc.contributor.author
Le Brun, V.
dc.contributor.author
Maier, C.
dc.contributor.author
Mainieri, V.
dc.contributor.author
Mignoli, M.
dc.contributor.author
Silverman, J.
dc.contributor.author
Tasca, L.A.M.
dc.contributor.author
Bolzonella, M.
dc.contributor.author
Bongiorno, A.
dc.contributor.author
Bottini, D.
dc.contributor.author
Capak, P.
dc.contributor.author
Caputi, K.
dc.contributor.author
Cimatti, A.
dc.contributor.author
Cucciati, O.
dc.contributor.author
Daddi, E.
dc.contributor.author
Feldmann, R.
dc.contributor.author
Franzetti, P.
dc.contributor.author
Garilli, B.
dc.contributor.author
Guzzo, L.
dc.contributor.author
Ilbert, O.
dc.contributor.author
Kampczyk, P.
dc.contributor.author
Kovac, K.
dc.contributor.author
Lamareille, F.
dc.contributor.author
Leauthaud, A.
dc.contributor.author
Le Borgne, J.-F.
dc.contributor.author
McCracken, H. J.
dc.contributor.author
Marinoni, C.
dc.contributor.author
Pello, R.
dc.contributor.author
Ricciardelli, E.
dc.contributor.author
Scarlata, C.
dc.contributor.author
Vergani, D.
dc.contributor.author
Sanders, D.B.
dc.contributor.author
Schinnerer, E.
dc.contributor.author
Scoville, N.
dc.contributor.author
Taniguchi, Y.
dc.contributor.author
Arnouts, S.
dc.contributor.author
Aussel, H.
dc.contributor.author
Bardelli, S.
dc.contributor.author
Brusa, M.
dc.contributor.author
Cappi, A.
dc.contributor.author
Ciliegi, P.
dc.contributor.author
Finoguenov, A.
dc.contributor.author
Foucaud, S.
dc.contributor.author
Franceschini, R.
dc.contributor.author
Halliday, C.
dc.contributor.author
Impey, C.
dc.contributor.author
Knobel, C.
dc.contributor.author
Koekemoer, A.
dc.contributor.author
Kurk, J.
dc.contributor.author
Maccagni, D.
dc.contributor.author
Maddox, S.
dc.contributor.author
Marano, B.
dc.contributor.author
Marconi, G.
dc.contributor.author
Meneux, B.
dc.contributor.author
Mobasher, B.
dc.contributor.author
Moreau, C.
dc.contributor.author
Peacock, J.A.
dc.contributor.author
Porciani, C.
dc.contributor.author
Pozzetti, L.
dc.contributor.author
Scaramella, R.
dc.contributor.author
Schiminovich, D.
dc.contributor.author
Shopbell, P.
dc.contributor.author
Smail, I.
dc.contributor.author
Thompson, D.
dc.contributor.author
Tresse, L.
dc.contributor.author
Vettolani, G.
dc.contributor.author
Zanichelli, A.
dc.contributor.author
Zucca, E.
dc.date.accessioned
2018-04-12T12:49:50Z
dc.date.available
2017-06-10T17:21:27Z
dc.date.available
2018-03-01T12:01:49Z
dc.date.available
2018-04-12T09:20:43Z
dc.date.available
2018-04-12T12:24:10Z
dc.date.available
2018-04-12T12:49:50Z
dc.date.issued
2017-11-28
dc.identifier.uri
http://hdl.handle.net/20.500.11850/67285
dc.description.abstract
zCOSMOS is a large-redshift survey that is being undertaken in the COSMOS field using 600hr of observation with the VIMOS spectrograph on the 8m VLT. The survey is designed to characterize the environments of COSMOS galaxies from the 100kpc scales of galaxy groups up to the 100Mpc scale of the cosmic web and to produce diagnostic information on galaxies and active galactic nuclei. The zCOSMOS survey consists of two parts: (1) zCOSMOS-bright, a magnitude-limited I-band IAB<22.5 sample of about 20000 galaxies with 0.1<z<1.2 covering the whole 1.7deg2 COSMOS ACS field, for which the survey parameters at z∼0.7 are designed to be directly comparable to those of the 2dFGRS at z∼0.1; and (2) zCOSMOS-deep, a survey of approximately 10000 galaxies selected through color-selection criteria to have 1.4<z<3.0, within the central 1deg2. This paper describes the survey design and the construction of the target catalogs and briefly outlines the observational program and the data pipeline. In the first observing season, spectra of 1303 zCOSMOS-bright targets and 977 zCOSMOS-deep targets have been obtained. A total of 10643 spectra could be extracted from the VIMOS observations and are presented in this release. Throughout the zCOSMOS-bright survey, 1arcsec wide slits have been used with a wavelength range of approximately 5500 to 9700Å sampled at roughly 2.5Å/pixel. The primary input catalogue for slit-mask design was generated using SExtractor (Bertin et al., 1996A&AS..117..393B) applied to the COSMOS F814W HST/ACS images sampled at 0.03arcsec/pixel (Koekemoer et al., 2007ApJS..172..196K, Leauthaud et al., 2007ApJS..172..219L) in a "hot and cold" two-pass process to first identify bright objects. This substantially reduced the tendency of the HST-based catalogue to "over-resolve" extended galaxies into multiple components. This initial SExtractor catalogue was then "cleaned" by carrying out a detailed comparison with one extracted from a stack of i* images obtained with MEGACAM on the 3.6m Canada-France-Hawaii telescope and processed at the TERAPIX data reduction center in Paris. This catalogue was also used to supplement the ACS catalogue for regions where the ACS images were unavailable or unusable. The zCOSMOS-bright target catalogue is intended to be simply defined as having an ACS/HST SExtractor "magauto" brightness in the range 15.00<IAB(814)<22.50. Generally, objects to be inserted into the slit mask are chosen randomly from the target catalogue. However, a few percent of targets (generally X-ray sources) are designated as "compulsory" targets and inserted into the masks with first priority. As a result, they are over-represented in the spectroscopic catalogue, by a factor which happens to be close to 2.0. Objects strongly suspected of being stars on the basis of morphology and spectral energy distribution are not included in the masks as targets and are classified as "forbidden". These are about 15% of the I<22.5 sample. However, the criteria for this exclusion are deliberately quite conservative and about 4% of the spectroscopic targets turn out to be stars. For each slit there is a primary target. Naturally, sometimes other targets happen to fall in the same slit. These "secondary targets" are indicated by preceding the redshift confidence class (see below) by a "2". Sometimes, these secondary objects were forbidden, but their spectra were anyway reduced and included in the catalogue. Given the inevitable complexity of the sample, users who require statistically complete samples are strongly encouraged to contact the zCOSMOS team for guidance.
en_US
dc.language.iso
en
en_US
dc.publisher
CDS Centré de Données astronomiques des Strasbourg
en_US
dc.subject
Surveys
en_US
dc.subject
Redshifts
en_US
dc.subject
Cosmology: observations
en_US
dc.subject
Galaxies: active
en_US
dc.subject
Galaxies: distances and redshifts
en_US
dc.subject
Galaxies: evolution
en_US
dc.subject
Large-scale structure of universe
en_US
dc.subject
Quasars: general
en_US
dc.title
zCOSMOS-bright catalog
en_US
dc.type
Data Collection
dc.date.published
2009-02-02
ethz.journal.title
VizieR On-line Data Catalog: J/ApJS/172/70
ethz.journal.issue
172
ethz.pages.start
70
ethz.size
1.064e+4 Records
en_US
ethz.notes
VizieR Online Data Catalog: J/ApJS/172/70
en_US
ethz.publication.place
Strasbourg
en_US
ethz.publication.status
published
ethz.identifier.url
http://cdsarc.u-strasbg.fr/viz-bin/Cat?J/ApJS/172/70
ethz.relation.isSupplementTo
20.500.11850/163470
ethz.date.deposited
2017-06-10T17:22:20Z
ethz.source
ECIT
ethz.identifier.importid
imp593650a1dcf8f62061
ethz.ecitpid
pub:107187
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2017-07-14T12:24:12Z
ethz.rosetta.lastUpdated
2018-12-02T09:36:38Z
ethz.rosetta.versionExported
true
ethz.COinS
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