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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 225850.0, MPI für Astronomie / Publikationen_mpia
A catalogue of the Chandra Deep Field South
with multi-colour classification and photometric
redshifts from COMBO-17
Authors:Wolf, C.; Meisenheimer, K.; Kleinheinrich, M.; Borch, A.; Dye, S.; Gray, M.; Wisotzki, L.; Bell, E. F.; Rix, H.-W.; Cimatti, A.; Hasinger, G.; Szokoly, G.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Astronomy and Astrophysics
Volume:421
Start Page:913
End Page:936
Review Status:not specified
Audience:Not Specified
Abstract / Description:We present the COMBO-17 object catalogue of
the Chandra Deep Field South for public use,
covering a field which is 31.5 arcmin ‚‚times; 30
arcmin in size. This catalogue lists astrometry,
photometry in 17 passbands from 350 to 930 nm,
and ground-based morphological data for 63 501
objects. The catalogue also contains
multi-colour classification into the categories
Star, Galaxy and Quasar as well as photometric
redshifts. We include restframe luminosities in
Johnson, SDSS and Bessell passbands and
estimated errors. The redshifts are most reliable
at R‚‚lt;24, where the sample contains
approximately 100 quasars, 1000 stars and 10 000
galaxies. We use nearly 1000 spectroscopically
identified objects in conjunction with detailed
simulations to characterize the performance of
COMBO-17. We show that the selection of quasars,
more generally type-1 AGN, is nearly complete
and minimally contaminated at z=[0.5,5] for
luminosities above MB = -21.7. Their
photometric redshifts are accurate to roughly
5000 km s-1. Galaxy redshifts are
accurate to 1% in ‚‚delta;z/(1+z) at
R‚‚lt;21. They degrade in quality for
progressively fainter galaxies, reaching
accuracies of 2% for galaxies with R ‚‚sim; 22
and of 10% for galaxies with R‚‚gt;24. The
selection of stars is complete to R ‚‚sim; 23,
and deeper for M stars. We also present an
updated discussion of our classification
technique with maps of survey completeness, and
discuss possible failures of the statistical
classification in the faint regime at R‚‚gap; 24.
Free Keywords:catalogs; surveys; techniques: photometric;
; methods: observational; galaxies: general
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Bldg., University of Oxford, Keble Road, Oxford,
OX1 3RH, UK), AB(Max-Planck-Institut f‚‚uuml;r
Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AC(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AD(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AE(Astrophysics Group,
Blackett Lab, Imperial College, Prince Consort
Road, London, UK), AF(School of Physics and
Astronomy, University of Nottingham, Nottingham,
NG7 2RD, UK), AG(Astrophysikalisches Institut
Potsdam, An der Sternwarte 16, 14482 Potsdam,
Germany), AH(Max-Planck-Institut f‚‚uuml;r
Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AI(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AJ(Istituto Nazionale di
Astrofisica (INAF), Osservatorio Astrofisico di
Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy),
AK(Max-Planck-Institut f‚‚uuml;r
Extraterrestrische Physik, Postfach 1312, 85741
Garching, Germany), AL(Max-Planck-Institut
f‚‚uuml;r Extraterrestrische Physik, Postfach
1312, 85741 Garching, Germany)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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