NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-16 T02:16:28 PST
Help | Comment | NED Home

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.
Retrieve 107 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home