For refcode 1996AJ....111..615P: Retrieve 107 NED objects in this reference. Please click here for ADS abstract
NED Abstract
Copyright by American Astronomical Society.
Reproduced by permission
1996AJ....111..615P
THE PALOMAR DISTANT CLUSTER SURVEY. I. THE CLUSTER CATALOG
MARC POSTMAN
Space Telescope Science Institute,2 3700 San Martin Drive, Baltimore,
Maryland 21218
Electronic mall: postman@stsci.edu
LORI M. LUBIN AND JAMES E. GUNN
Princeton University Observatory, Princeton, New Jersey 08544
Electronic mall: lml@ociw.edu, jeg@astro.princeton.edu
J. B. OKE
Palomar Observatory, California Institute of Technology, Pasadena,
California 91125, and Dominion Astrophysical Observatory, Victoria, BC
V8X 4M6, Canada
Electronic mall: jbo@cygnus.dao.nrc.ca
JOHN G. HOESSEL
Washburn Observatory, University of Wisconsin-Madison, 475 N. Charter
St., Madison, Wisconsin 53706
Electronic mail: hoessel@uwtpe.astro.wisc.edu
DONALD P. SCHNEIDER
Department of Astronomy and Astrophysics, The Pennsylvania State
University, 525 Davey Lab, University Park, Pennsylvania 16802, and
Institute for Advanced Study, School of Natural Sciences, Princeton, New
Jersey 08540
Electronic mail: dps@miffy.astro.psu.edu
JENNNER A. CHRISTENSEN
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore,
Maryland 21218
Electronic mall: christen@stsci.edu
Received 1995 July 26; revised 1995 November 6
ABSTRACT
We present an optical/near-IR selected catalog of 79 clusters distributed
over an area of 5.1^deg^ sq. The catalog was constructed from images
obtained with the 4-Shooter CCD mosaic camera on the Hale 5 m telescope
operating in "scan" mode. The survey, hereafter known as the Palomar
distant cluster survey (PDCS), was conducted in two broadband filters
that closely resemble V and I. The 4 {sigma} limiting magnitudes for our
300 s exposures are ~23.8(V) and 22.5 (I). A matched filter algorithm was
developed and employed to identify the cluster candidates by using
positional and photometric data simultaneously. The clusters cover the
range 0.2 <~ z <~ 1.2, based on the redshift estimates derived in the
cluster detection procedure. An accurate selection function is generated
from extensive simulations. We find that the cumulative surface density
of clusters with richness class R => 1 is about a factor of 5 higher than
the extrapolated density of R => 1 Abell clusters. The PDCS results are
consistent with a constant comoving density of clusters to z <~ 0.6,
albeit at the above high density level. Constraints on cluster abundances
at z > 0.6 will be possible with the acquisition of spectroscopic
redshifts for a large subset of these cluster candidates. We also present
a supplemental catalog of 28 clusters that do not satisfy all our
selection criteria but which include some of the most distant systems
detected in the survey. Finding charts for all 107 cluster candidates are
provided.
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