/ftp/cats/III/268



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III/268             DEEP2 Redshift Survey, Data Release 4  (Matthews+ 2013)
The following files can be converted to FITS (extension .fit or fit.gz)
	deep2dr4.dat deep2all.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=III/268
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drwxr-xr-x 259 cats archive 8192 Dec 5 19:00 [Up] drwxr-xr-x 3 cats archive 4096 Jul 25 2023 [TAR file] -rw-r--r-- 1 cats archive 472 Jul 25 2023 .message -r--r--r-- 1 cats archive 11415 Feb 17 2014 ReadMe -rw-r--r-- 1 cats archive 1040 Jul 25 2023 +footg5.gif -rw-r--r-- 1 cats archive 3303 Jul 25 2023 +footg8.gif -r--r--r-- 1 cats archive 3975512 Jan 13 2014 deep2all.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 3873792 Jan 13 2014 deep2dr4.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : III/268 DEEP2 Redshift Survey, Data Release 4 (Matthews+ 2013) ================================================================================ The DEEP2 Redshift Survey (Data Release 4) Matthews D.J., Newman J.A., Coil A.L., Cooper M.C., Gwyn S.D.J. <Astrophys. J. Suppl. Ser. 204, 21 (2013)> =2013ApJS..204...21M =2013yCat.3268....0M ================================================================================ ADC_Keywords: Galaxy catalogs ; Redshifts ; Velocity dispersion Keywords: astrometry ; catalogs ; galaxies: distances and redshifts ; galaxies: photometry ; surveys ; techniques: photometric Abstract: This paper describes a new catalog that supplements the existing DEEP2 Galaxy Redshift Survey photometric and spectroscopic catalogs with ugriz photometry from two other surveys: the Canada-France-Hawaii Legacy Survey (CFHTLS) and the Sloan Digital Sky Survey (SDSS). Each catalog is cross-matched by position on the sky in order to assign ugriz photometry to objects in the DEEP2 catalogs. We have recalibrated the CFHTLS photometry where it overlaps DEEP2 in order to provide a more uniform data set. We have also used this improved photometry to predict DEEP2 BRI photometry in regions where only poorer measurements were available previously. In addition, we have included improved astrometry tied to SDSS rather than USNO-A2.0 for all DEEP2 objects. In total this catalog contains  27, 000 objects with full ugriz photometry as well as robust spectroscopic redshift measurements, 64% of which have r > 23. By combining the secure and accurate redshifts of the DEEP2 Galaxy Redshift Survey with ugriz photometry, we have created a catalog that can be used as an excellent testbed for future photo-z studies, including tests of algorithms for surveys such as LSST and DES. Description: The DEEP2 redshift survey was achieved with the DEIMOS multi-object spectrograph on the Keck II 10m telescope in 2002-2008; it used a total of 411 slitmasks covering approximately 3 square degrees over 4 separate fields. As detailed in Newman et al. (2013ApJS..208....5N), targets were selected from the BRI photometric catalogs of Coil et al. (2004ApJ...617..765C, Cat. II/301), reaching a limiting magnitude of R_AB_=24.1mag. The 1200 line/mm grating was employed with a central wavelength of 780nm, yielding a resolution of R 5000 and typically covering a wavelength range of 650-910nm (depending on slit placement on the mask). The OG550 order-blocking filter was used to limit flux blueward of 555nm, and each slitmask was observed for approximately one hour, depending on the observing conditions (i.e. transparency and/or seeing). Typical slitlengths are around 6arcsec, with a standard 1arcsec slitwidth. The DEEP2-DR4 Redshift Survey includes 52,989 entries, corresponding to all spectroscopic targets regardless of whether an accurate redshift was measured; only galaxies with redshift quality q_z>=3 should be treated as having a reliable redshift measurement (objects identified as stars are given q_z=-1). Also, be sure to note that while there are 52,989 entries in the redshift catalog, some objects were observed multiple times (to test redshift accuracy, etc.) and the redshift catalog contains 50,319 unique objects. In addition to the full catalog, here we provide a trimmed, unique redshift catalog which removes duplicated objects (keeping entries with higher redshift quality where appropriate): Acknowledging DEEP2: Scientific and technical publications using DEEP2 data should acknowledge (http://deep.ps.uci.edu/DR4/credit.html)