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J/MNRAS/415/1479 LESS photometric redshift survey (Wardlow+, 2011)
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Beginning of ReadMe :J/MNRAS/415/1479 LESS photometric redshift survey (Wardlow+, 2011)
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The LABOCA survey of the Extended Chandra Deep Field-South:
a photometric redshift survey of submillimetre galaxies.
Wardlow J.L., Smail I., Coppin K.E.K., Alexander D.M., Brandt W.N.,
Danielson A.L.R., Luo B., Swinbank A.M., Walter F., Weiss A., Xue Y.Q.,
Zibetti S., Bertoldi F., Biggs A.D., Chapman S.C., Dannerbauer H.,
Dunlop J.S., Gawiser E., Ivison R.J., Knudsen K.K., Kovacs A., Lacey C.G.,
Menten K.M., Padilla N., Rix H.-W., Van Der Werf P.P.
<Mon. Not. R. Astron. Soc., 415, 1479-1508 (2011)>
=2011MNRAS.415.1479W
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ADC_Keywords: Millimetric/submm sources ; Galaxies, IR ; Galaxies, photometry
Keywords: galaxies: evolution - galaxies: high-redshift - galaxies: starburst -
submillimetre: galaxies
Abstract:
We derive photometric redshifts from 17-band optical to mid-infrared
photometry of 78 robust radio, 24um and Spitzer IRAC counterparts to
72 of the 126 submillimetre galaxies (SMGs) selected at 870um by
LABOCA observations in the Extended Chandra Deep Field-South (ECDF-S).
We test the photometric redshifts of the SMGs against the extensive
archival spectroscopy in the ECDF-S.
Description:
SMGs typically have faint optical and near-IR counterparts (e.g.
Ivison et al. 2002MNRAS.337....1I), so we require deep photometry for
accurate photometric redshift estimates. The ECDF-S was chosen for
this survey because it is an exceptionally well-studied field and as
such we are able to utilize data from extensive archival imaging and
spectroscopic surveys. For completeness and uniformity, we only
consider surveys that cover a large fraction of the ECDF-S rather than
the smaller and deeper central Chandra Deep Field-South (CDF-S)
region. Therefore, we utilize the MUltiwavelength Survey by Yale-Chile
(MUSYC; Gawiser et al. 2006, Cat. J/ApJS/162/1) near-IR survey for U-
to K-band imaging (Taylor et al. 2009, Cat. J/ApJS/183/295), and the
Spitzer IRAC/MUSYC Public Legacy in ECDF-S (SIMPLE) imaging for
Spitzer IRAC data (Damen et al. 2011, cat. J/ApJ/727/1). We also
include U-band data from the deep GOODS/VIMOS imaging survey of the
CDF-S (Nonino et al. 2009ApJS..183..244N); although this covers only
60 per cent of LESS SMGs, it is valuable for galaxies that are
undetected at short wavelengths in the shallower MUSYC survey.
In addition, we have carried out deep near-IR observations in the J
and Ks bands with the HAWK-I at the ESO-VLT (ID: 082.A-0890, PI: N.
Padilla).