The northern sky optical cluster survey. IV. An intermediate-redshift galaxy cluster catalog and the comparison of two detection algorithms

P. A.A. Lopes, R. R. De Carvalho, R. R. Gal, S. G. Djorgovski, S. C. Odewahn, A. A. Mahabal, R. J. Brunner

Research output: Contribution to journalReview article

Abstract

We present an optically selected galaxy cluster catalog from ∼2700 deg2 of the digitized Second Palomar Observatory Sky Survey (DPOSS), spanning the redshift range 0.1 ≲ z ≲ 0.5, providing an intermediate-redshift supplement to the previous DPOSS cluster survey. This new catalog contains 9956 cluster candidates and is the largest resource of rich clusters in this redshift range to date. The candidates are detected using the best DPOSS plates based on seeing and limiting magnitude. The search is further restricted to high galactic latitude (|b| > 50°), where stellar contamination is modest and nearly uniform. We also present a performance comparison of two different detection methods applied to this data, the adaptive kernel and Voronoi tessellation techniques. In the regime where both catalogs are expected to be complete, we find excellent agreement, as well as with the most recent surveys in the literature. Extensive simulations are performed and applied to the two different methods, indicating a contamination rate of ∼5%. These simulations are also used to optimize the algorithms and evaluate the selection function for the final cluster catalog. Redshift and richness estimates are also provided, making possible the selection of subsamples for future studies.

Original languageEnglish (US)
Pages (from-to)1017-1045
Number of pages29
JournalAstronomical Journal
Volume128
Issue number3 1785
DOIs
StatePublished - Sep 1 2004

Fingerprint

northern sky
catalogs
galaxies
observatories
observatory
contamination
supplements
detection method
simulation
resources
comparison
detection
resource
estimates

Keywords

  • Galaxies: clusters: general
  • Methods: numerical
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

The northern sky optical cluster survey. IV. An intermediate-redshift galaxy cluster catalog and the comparison of two detection algorithms. / Lopes, P. A.A.; De Carvalho, R. R.; Gal, R. R.; Djorgovski, S. G.; Odewahn, S. C.; Mahabal, A. A.; Brunner, R. J.

In: Astronomical Journal, Vol. 128, No. 3 1785, 01.09.2004, p. 1017-1045.

Research output: Contribution to journalReview article

Lopes, P. A.A. ; De Carvalho, R. R. ; Gal, R. R. ; Djorgovski, S. G. ; Odewahn, S. C. ; Mahabal, A. A. ; Brunner, R. J. / The northern sky optical cluster survey. IV. An intermediate-redshift galaxy cluster catalog and the comparison of two detection algorithms. In: Astronomical Journal. 2004 ; Vol. 128, No. 3 1785. pp. 1017-1045.
@article{8e70e1895500426eb13ba69540185973,
title = "The northern sky optical cluster survey. IV. An intermediate-redshift galaxy cluster catalog and the comparison of two detection algorithms",
abstract = "We present an optically selected galaxy cluster catalog from ∼2700 deg2 of the digitized Second Palomar Observatory Sky Survey (DPOSS), spanning the redshift range 0.1 ≲ z ≲ 0.5, providing an intermediate-redshift supplement to the previous DPOSS cluster survey. This new catalog contains 9956 cluster candidates and is the largest resource of rich clusters in this redshift range to date. The candidates are detected using the best DPOSS plates based on seeing and limiting magnitude. The search is further restricted to high galactic latitude (|b| > 50°), where stellar contamination is modest and nearly uniform. We also present a performance comparison of two different detection methods applied to this data, the adaptive kernel and Voronoi tessellation techniques. In the regime where both catalogs are expected to be complete, we find excellent agreement, as well as with the most recent surveys in the literature. Extensive simulations are performed and applied to the two different methods, indicating a contamination rate of ∼5{\%}. These simulations are also used to optimize the algorithms and evaluate the selection function for the final cluster catalog. Redshift and richness estimates are also provided, making possible the selection of subsamples for future studies.",
keywords = "Galaxies: clusters: general, Methods: numerical, Surveys",
author = "Lopes, {P. A.A.} and {De Carvalho}, {R. R.} and Gal, {R. R.} and Djorgovski, {S. G.} and Odewahn, {S. C.} and Mahabal, {A. A.} and Brunner, {R. J.}",
year = "2004",
month = "9",
day = "1",
doi = "10.1086/423038",
language = "English (US)",
volume = "128",
pages = "1017--1045",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "3 1785",

}

TY - JOUR

T1 - The northern sky optical cluster survey. IV. An intermediate-redshift galaxy cluster catalog and the comparison of two detection algorithms

AU - Lopes, P. A.A.

AU - De Carvalho, R. R.

AU - Gal, R. R.

AU - Djorgovski, S. G.

AU - Odewahn, S. C.

AU - Mahabal, A. A.

AU - Brunner, R. J.

PY - 2004/9/1

Y1 - 2004/9/1

N2 - We present an optically selected galaxy cluster catalog from ∼2700 deg2 of the digitized Second Palomar Observatory Sky Survey (DPOSS), spanning the redshift range 0.1 ≲ z ≲ 0.5, providing an intermediate-redshift supplement to the previous DPOSS cluster survey. This new catalog contains 9956 cluster candidates and is the largest resource of rich clusters in this redshift range to date. The candidates are detected using the best DPOSS plates based on seeing and limiting magnitude. The search is further restricted to high galactic latitude (|b| > 50°), where stellar contamination is modest and nearly uniform. We also present a performance comparison of two different detection methods applied to this data, the adaptive kernel and Voronoi tessellation techniques. In the regime where both catalogs are expected to be complete, we find excellent agreement, as well as with the most recent surveys in the literature. Extensive simulations are performed and applied to the two different methods, indicating a contamination rate of ∼5%. These simulations are also used to optimize the algorithms and evaluate the selection function for the final cluster catalog. Redshift and richness estimates are also provided, making possible the selection of subsamples for future studies.

AB - We present an optically selected galaxy cluster catalog from ∼2700 deg2 of the digitized Second Palomar Observatory Sky Survey (DPOSS), spanning the redshift range 0.1 ≲ z ≲ 0.5, providing an intermediate-redshift supplement to the previous DPOSS cluster survey. This new catalog contains 9956 cluster candidates and is the largest resource of rich clusters in this redshift range to date. The candidates are detected using the best DPOSS plates based on seeing and limiting magnitude. The search is further restricted to high galactic latitude (|b| > 50°), where stellar contamination is modest and nearly uniform. We also present a performance comparison of two different detection methods applied to this data, the adaptive kernel and Voronoi tessellation techniques. In the regime where both catalogs are expected to be complete, we find excellent agreement, as well as with the most recent surveys in the literature. Extensive simulations are performed and applied to the two different methods, indicating a contamination rate of ∼5%. These simulations are also used to optimize the algorithms and evaluate the selection function for the final cluster catalog. Redshift and richness estimates are also provided, making possible the selection of subsamples for future studies.

KW - Galaxies: clusters: general

KW - Methods: numerical

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=7944222703&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=7944222703&partnerID=8YFLogxK

U2 - 10.1086/423038

DO - 10.1086/423038

M3 - Review article

AN - SCOPUS:7944222703

VL - 128

SP - 1017

EP - 1045

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 3 1785

ER -