J/other/NewA/58.61 SDSS DR9 galaxy clusters optical catalog (Banerjee+, 2018)
An optical catalog of galaxy clusters obtained from an Adaptive Matched Filter
Finder applied to SDSS DR9 Data.
Banerjee P., Szabo T., Pierpaoli E., Franco G., Ortiz M., Oramas A.,
Tornello B.
<New Astron., 58, 61-71 (2018)>
=2018NewA...58...61B 2018NewA...58...61B (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Clusters, galaxy ; Galaxies, optical
Keywords: cosmology: galaxies - clusters: optical - catalogs
Abstract:
We present a new galaxy cluster catalog constructed from the Sloan
Digital Sky Survey Data Release 9 (SDSS DR9) using an Adaptive Matched
Filter (AMF) technique. Our catalog has 46479 galaxy clusters with
richness Λ200>20 in the redshift range 0.045≤z<0.641 in
∼11500 deg2 of the sky. Angular position, richness, core and virial
radii and redshift estimates for these clusters, as well as their
error analysis, are provided as part of this catalog. In addition to
the main version of the catalog, we also provide an extended version
with a lower richness cut, containing 79368 clusters. This version,
in addition to the clusters in the main catalog, also contains those
clusters (with richness 10<Λ200<20) which have a one-to-one
match in the DR8 catalog developed by Wen et al (WHL). We obtain
probabilities for cluster membership for each galaxy and implement
several procedures for the identification and removal of false cluster
detections.
We cross-correlate the main AMF DR9 catalog with a number of cluster
catalogs in different wavebands (Optical, X-ray). We compare our
catalog with other SDSS-based ones such as the redMaPPer (Rykoff et
al., 2014, Cat. J/ApJ/785/104, 26350 clusters) and the Wen et al.
(WHL, 2012, Cat. J/ApJS/199/34) (132684 clusters) in the same area of
the sky and in the overlapping redshift range. We match 97% of the
richest Abell clusters (Richness group 3), the same as WHL, while
redMaPPer matches ∼90% of these clusters. Considering AMF DR9 richness
bins, redMaPPer does not have one-to-one matches for 70% of our lowest
richness clusters (20<Λ200<40), while WHL matches 54% of
these missed clusters (not present in redMaPPer). redMaPPer
consistently does not possess one-to-one matches for ∼20% AMF DR9
clusters with Λ200>40, while WHL matches ≥70% of these
missed clusters on average. For comparisons with X-ray clusters, we
match the AMF catalog with BAX, MCXC and a combined catalog from NORAS
and REFLEX. We consistently obtain a greater number of one-to-one
matches for X--ray clusters across higher luminosity bins
(Lx>6x1044erg/s) than redMaPPer while WHL matches the most
clusters overall. For the most luminous clusters (Lx>8), our catalog
performs equivalently to WHL. This new catalog provides a wider sample
than redMaPPer while retaining many fewer objects than WHL.
Description:
The data is derived from Data Release 9 of SDSS using an Adaptive
Matched Filter technique, which is adaptable to future deeper optical
surveys.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 98 46479 Cluster catalog (corrected by CDS)
errors.dat 81 34825 Errors associated with the clusters
(where applicable)
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See also:
J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)
J/ApJ/785/104 : redMaPPer. I. Algorithm applied to SDSS DR8 (Rykoff+, 2014)
Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID AMF DR9 Cluster ID
7- 10 A4 --- --- [AMF9]
12- 27 A16 --- AMF9 AMF DR9 Cluster Name (JHHMMSS.s+DDMMSS)
29- 36 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
38- 45 F8.4 deg DEdeg Declination in decimal degrees (J2000)
47- 52 F6.4 --- z Cluster redshift
54- 62 F9.4 --- Lk Cluster likelihood
64- 71 F8.4 --- Lambda200 Cluster richness
73- 77 F5.3 --- r200 Cluster R200 value
79- 83 F5.3 --- rc Core radius of the cluster
85- 90 F6.3 --- c Concentration parameter of the cluster
92- 98 F7.4 --- str-rh Richness order of the cluster within its stripe
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Byte-by-byte Description of file: errors.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID AMF DR9 Cluster ID
7- 14 F8.4 % rh68 ? Richness error (68% confidence interval) (in %)
15 A1 --- n_rh68 [i] i for -infinity
17- 24 F8.4 % rh95 ? Richness error (95%) (in %)
25 A1 --- n_rh95 [i] i for -infinity
27- 34 F8.4 % rc68 Core radius error (68%) (in %)
36- 43 F8.4 % rc95 Core radius error (95%) (in %)
45- 52 F8.4 % z68 Redshift error (68%) (in %)
54- 61 F8.4 % z95 Redshift error (95%) (in %)
63- 71 F9.4 % pos68 Error in centering (68%) (in %)
73- 81 F9.4 % pos95 Error in centering (95%) (in %)
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Acknowledgements:
Panchajanya Banerjee, panchajb(at)usc.edu
(End) Patricia Vannier [CDS] 08-Aug-2017