J/ApJ/785/104 redMaPPer. I. Algorithm applied to SDSS DR8 (Rykoff+, 2014)
redMaPPer. I. Algorithm and SDSS DR8 catalog.
Rykoff E.S., Rozo E., Busha M.T., Cunha C.E., Finoguenov A., Evrard A.,
Hao J., Koester B.P., Leauthaud A., Nord B., Pierre M., Reddick R.,
Sadibekova T., Sheldon E.S., Wechsler R.H.
<Astrophys. J., 785, 104 (2014)>
=2014ApJ...785..104R 2014ApJ...785..104R (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Photometry ; Models ; Redshifts ; Surveys
Keywords: galaxies: clusters: general
Abstract:
We describe redMaPPer, a new red sequence cluster finder specifically
designed to make optimal use of ongoing and near-future large
photometric surveys. The algorithm has multiple attractive features:
(1) it can iteratively self-train the red sequence model based on a
minimal spectroscopic training sample, an important feature for
high-redshift surveys. (2) It can handle complex masks with varying
depth. (3) It produces cluster-appropriate random points to enable
large-scale structure studies. (4) All clusters are assigned a full
redshift probability distribution P(z). (5) Similarly, clusters can
have multiple candidate central galaxies, each with corresponding
centering probabilities. (6) The algorithm is parallel and numerically
efficient: it can run a Dark Energy Survey-like catalog in ∼500 CPU
hours. (7) The algorithm exhibits excellent photometric redshift
performance, the richness estimates are tightly correlated with
external mass proxies, and the completeness and purity of the
corresponding catalogs are superb. We apply the redMaPPer algorithm to
∼10000deg2 of SDSS DR8 data and present the resulting catalog of
∼25000 clusters over the redshift range z∈[0.08,0.55]. The
redMaPPer photometric redshifts are nearly Gaussian, with a scatter
σz∼0.006 at z∼0.1, increasing to σz∼0.02 at z∼0.5 due
to increased photometric noise near the survey limit. The median value
for |Δz|/(1+z) for the full sample is 0.006. The incidence of
projection effects is low (≤ 5%). Detailed performance comparisons of
the redMaPPer DR8 cluster catalog to X-ray and Sunyaev-Zel'dovich
catalogs are presented in a companion paper.
Description:
The redMaPPer algorithm is designed to handle an arbitrary photometric
galaxy catalog, with an arbitrary number of photometric bands (≥3).
Of course, the quality of the output depends on the quality of the
photometry. As a case study, in this paper we run redMaPPer on SDSS
DR8 data (Aihara et al. 2011ApJS..193...29A 2011ApJS..193...29A), due to its large area
and uniform coverage.
Although our cluster finder uses only photometric data, we require
spectroscopic data to calibrate the red sequence and to validate our
photometric redshifts. For this purpose we use the SDSS DR9
spectroscopic catalog (Ahn et al. 2012, V/139).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 829 25325 redMaPPer DR8 cluster catalog
table2.dat 153 1318360 redMaPPer DR8 member catalog
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See also:
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
II/306 : The SDSS Photometric Catalog, Release 8 (Adelman-McCarthy+, 2011)
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
J/ApJS/224/1 : redMaPPer cluster catalog from DES data (Rykoff+, 2016)
J/ApJ/761/22 : NIR galaxy cluster candidates in the SPT survey (Song+, 2012)
J/MNRAS/423/3561 : X-ray clusters from XMM (Clerc+, 2012)
J/ApJS/199/34 : Clusters of galaxies in SDSS-III (Wen+, 2012)
J/ApJ/746/178 : The augmented maxBCG cluster catalog (Rykoff+, 2012)
J/A+A/535/A65 : Galaxy clusters in the 4 CFHTLS Wide fields (Durret+, 2011)
J/A+A/534/A109 : MCXC Meta-Catalogue X-ray galaxy Clusters (Piffaretti+, 2011)
J/ApJ/736/21 : Gal. clusters optical cat. from AMF on SDSS DR6 (Szabo+ 2011)
J/ApJS/191/254 : GMBCG galaxy cluster catalog from SDSS DR7 (Hao+, 2010)
J/AJ/137/2981 : Northern Optical Cluster Survey. III. (Gal+, 2009)
J/ApJ/684/905 : Galaxy clusters from IRAC Shallow Survey (Eisenhardt+, 2008)
J/MNRAS/379/867 : BCG C4 cluster catalog (von der Linden+, 2007)
J/ApJ/660/239 : MaxBCG catalog of galaxy clusters from SDSS (Koester+, 2007)
J/AJ/128/1017 : Northern Optical Cluster Survey. IV. (Lopes+, 2005)
J/ApJS/148/243 : Catalog of clusters of galaxies from SDSS (Bahcall+, 2003)
J/AJ/123/1807 : SDSS galaxy clusters redshifts (Goto+, 2002)
http://www.sdss3.org/ : SDSS-III home page
http://risa.stanford.edu/redmapper/ : redMaPPer home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- ID [1/183668] redMaPPer Cluster identifier
8- 27 A20 --- Name redMaPPer Cluster name (RMJHHMMSS.s+DDMMSS.s)
29- 39 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
41- 51 F11.7 deg DEdeg Declination in decimal degrees (J2000)
53- 58 F6.4 --- zlambda [0.08/0.55] Cluster photo-z; zλ
60- 65 F6.4 --- e_zlambda [0.004/0.03] Gaussian error estimate in zlambda
67- 72 F6.2 --- lambda [20/300.2] Richness estimate
74- 78 F5.2 --- e_lambda [1/74] Gaussian error estimate in lambda
80- 84 F5.3 --- S [1/3.4] Richness scale factor; see Equ. 22
86- 93 F8.5 --- zspec [0.05/0.9]?=-1 SDSS spectroscopic redshift (1)
95-113 I19 --- ObjID SDSS DR8 CAS object identifier
115-120 F6.3 mag imag [13.2/20.2] Dereddened i-band cmodel magnitude
(for most likely central galaxy)
122-126 F5.3 mag e_imag [0.002/0.4] Error in imag
128-133 F6.3 mag umagm [13.4/29.8] Dereddened u-band model magnitude
(for most likely central galaxy)
135-140 F6.3 mag e_umagm [0.006/13] Error in umagm
142-147 F6.3 mag gmagm [14.6/29] Dereddened g-band model magnitude
(for most likely central galaxy)
149-154 F6.3 mag e_gmagm [0.002/20] Error in gmagm
156-161 F6.3 mag rmagm [13.6/22.5] Dereddened r-band model magnitude
(for most likely central galaxy)
163-167 F5.3 mag e_rmagm [0.002/6] Error in rmagm
169-174 F6.3 mag imagm [13.2/21.7] Dereddened i-band model magnitude
(for most likely central galaxy)
176-180 F5.3 mag e_imagm [0.002/0.3] Error in imagm
182-187 F6.3 mag zmagm [12.9/27.6] Dereddened z-band model magnitude
(for most likely central galaxy)
189-194 F6.3 mag e_zmagm [0.003/34] Error in zmagm
196-202 F7.3 Lsun iLum [8.8/169.3] Total membership-weighted i-band
luminosity
204-212 E9.3 --- PCen0 [0.2/1] Centering probability (2)
214-224 F11.7 deg RA0deg Right Ascension in decimal degrees (J2000) (2)
226-236 F11.7 deg DE0deg Declination in decimal degrees (J2000) (2)
238-256 I19 --- ID0 DR8 CAS object identifier (2)
258-266 E9.3 --- PCen1 [0/0.5] Centering probability (3)
268-278 F11.7 deg RA1deg Right Ascension in decimal degrees (J2000) (3)
280-290 F11.7 deg DE1deg Declination in decimal degrees (J2000) (3)
292-310 I19 --- ID1 DR8 CAS object identifier (3)
312-320 E9.3 --- PCen2 [0/0.4] Centering probability (4)
322-332 F11.7 deg RA2deg Right Ascension in decimal degrees (J2000) (4)
334-344 F11.7 deg DE2deg Declination in decimal degrees (J2000) (4)
346-364 I19 --- ID2 DR8 CAS object identifier (4)
366-374 E9.3 --- PCen3 [0/0.3] Centering probability (5)
376-386 F11.7 deg RA3deg Right Ascension in decimal degrees (J2000) (5)
388-398 F11.7 deg DE3deg Declination in decimal degrees (J2000) (5)
400-418 I19 --- ID3 DR8 CAS object identifier (5)
420-428 E9.3 --- PCen4 [0/0.2] Centering probability (6)
430-440 F11.7 deg RA4deg Right Ascension in decimal degrees (J2000) (6)
442-452 F11.7 deg DE4deg Declination in decimal degrees (J2000) (6)
454-472 I19 --- ID4 DR8 CAS object identifier (6)
474-479 F6.4 --- PZbin1 [0.03/0.42] PZ bin number 1
481-486 F6.4 --- PZbin2 [0.04/0.44] PZ bin number 2
488-493 F6.4 --- PZbin3 [0.04/0.45] PZ bin number 3
495-500 F6.4 --- PZbin4 [0.04/0.46] PZ bin number 4
502-507 F6.4 --- PZbin5 [0.05/0.47] PZ bin number 5
509-514 F6.4 --- PZbin6 [0.05/0.49] PZ bin number 6
516-521 F6.4 --- PZbin7 [0.06/0.50] PZ bin number 7
523-528 F6.4 --- PZbin8 [0.06/0.51] PZ bin number 8
530-535 F6.4 --- PZbin9 [0.07/0.53] PZ bin number 9
537-542 F6.4 --- PZbin10 [0.07/0.54] PZ bin number 10
544-549 F6.4 --- PZbin11 [0.08/0.55] PZ bin number 11
551-556 F6.4 --- PZbin12 [0.08/0.57] PZ bin number 12
558-563 F6.4 --- PZbin13 [0.08/0.59] PZ bin number 13
565-570 F6.4 --- PZbin14 [0.09/0.61] PZ bin number 14
572-577 F6.4 --- PZbin15 [0.09/0.63] PZ bin number 15
579-584 F6.4 --- PZbin16 [0.10/0.65] PZ bin number 16
586-591 F6.4 --- PZbin17 [0.10/0.67] PZ bin number 17
593-598 F6.4 --- PZbin18 [0.10/0.69] PZ bin number 18
600-605 F6.4 --- PZbin19 [0.11/0.71] PZ bin number 19
607-612 F6.4 --- PZbin20 [0.11/0.73] PZ bin number 20
614-619 F6.4 --- PZbin21 [0.12/0.75] PZ bin number 21
621-629 E9.3 --- PZ1 [0/0.14] The P(z) evaluated at PZbin1 (7)
631-639 E9.3 --- PZ2 [0/0.37] The P(z) evaluated at PZbin2 (7)
641-649 E9.3 --- PZ3 [0/0.82] The P(z) evaluated at PZbin3 (7)
651-659 E9.3 --- PZ4 [0/1.62] The P(z) evaluated at PZbin4 (7)
661-669 E9.3 --- PZ5 [0/3] The P(z) evaluated at PZbin5 (7)
671-679 E9.3 --- PZ6 [0.0001/4.7] The P(z) evaluated at PZbin6 (7)
681-689 E9.3 --- PZ7 [0.01/8.4] The P(z) evaluated at PZbin7 (7)
691-699 E9.3 --- PZ8 [0.4/24.4] The P(z) evaluated at PZbin8 (7)
701-709 E9.3 --- PZ9 [3.6/52.7] The P(z) evaluated at PZbin9 (7)
711-719 E9.3 --- PZ10 [10.6/82] The P(z) evaluated at PZbin10 (7)
721-729 E9.3 --- PZ11 [14/94.2] The P(z) evaluated at PZbin11 (7)
731-739 E9.3 --- PZ12 [11.2/82.8] The P(z) evaluated at PZbin12 (7)
741-749 E9.3 --- PZ13 [5.6/53.5] The P(z) evaluated at PZbin13 (7)
751-759 E9.3 --- PZ14 [1.3/25.8] The P(z) evaluated at PZbin14 (7)
761-769 E9.3 --- PZ15 [0.2/9] The P(z) evaluated at PZbin15 (7)
771-779 E9.3 --- PZ16 [0.03/2.2] The P(z) evaluated at PZbin16 (7)
781-789 E9.3 --- PZ17 [0.005/0.4] The P(z) evaluated at PZbin17 (7)
791-799 E9.3 --- PZ18 [0.0007/0.06] The P(z) evaluated at PZbin18 (7)
801-809 E9.3 --- PZ19 [0.0001/0.005] The P(z) evaluated at PZbin19 (7)
811-819 E9.3 --- PZ20 [0/0.00031] The P(z) evaluated at PZbin20 (7)
821-829 E9.3 --- PZ21 The P(z) evaluated at PZbin21 (7)
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Note (1): For most likely center.
Note (2): For most likely central.
Note (3): For second most likely central.
Note (4): For third most likely central.
Note (5): For fourth most likely central.
Note (6): For fifth most likely central.
Note (7): Full redshift probability distribution P(z);
see Sheldon et al. (2012ApJS..201...32S 2012ApJS..201...32S)
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- ID [1/183668] redMaPPer Cluster identifier
8- 18 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
20- 30 F11.7 deg DEdeg Declination in decimal degrees (J2000)
32- 36 F5.3 --- R [0/1.8] Distance from cluster center; h-1Mpc
38- 42 F5.3 --- PMem [0/1] Membership probability
44- 49 F6.3 mag imag [12.9/21] Dereddened i-band cmodel magnitude
51- 55 F5.3 mag e_imag [0.002/7.6] Error in imag
57- 62 F6.3 mag umagm [13.4/31.3] Dereddened u-band model magnitude
64- 69 F6.3 mag e_umagm [0.006/38] Error in umagm
71- 76 F6.3 mag gmagm [14/31.1] Dereddened g-band model magnitude
78- 83 F6.3 mag e_gmagm [0.002/96] Error in gmagm
85- 90 F6.3 mag rmagm [13/26] Dereddened r-band model magnitude
92- 96 F5.3 mag e_rmagm [0.002/8.2] Error in rmagm
98-103 F6.3 mag imagm [12.8/26] Dereddened i-band model magnitude
105-110 F6.3 mag e_imagm [0.002/13] Error in imagm
112-117 F6.3 mag zmagm [12.5/29] Dereddened z-band model magnitude
119-124 F6.3 mag e_zmagm [0.003/99] Error in zmagm
126-133 F8.5 --- zspec [0.02/0.92]?=-1 SDSS spectroscopic redshift
135-153 I19 --- ObjID SDSS DR8 CAS object identifier
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History:
From electronic version of the journal
References:
Rozo & Rykoff Paper II. 2014ApJ...783...80R 2014ApJ...783...80R
Rozo et al. Paper III. 2015MNRAS.450..592R 2015MNRAS.450..592R
Rozo et al. Paper IV. 2015MNRAS.453...38R 2015MNRAS.453...38R
Rykoff et al. from DES data 2016ApJS..224....1R 2016ApJS..224....1R Cat. J/ApJS/224/1
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 16-Nov-2016