J/ApJS/216/27 Galaxy clusters discovered in the SPT-SZ survey (Bleem+, 2015)
Galaxy clusters discovered via the Sunyaev-Zel'dovich effect in the
2500-square-degree SPT-SZ survey.
Bleem L.E., Stalder B., de Haan T., Aird K.A., Allen S.W., Applegate D.E.,
Ashby M.L.N., Bautz M., Bayliss M., Benson B.A., Bocquet S., Brodwin M.,
Carlstrom J.E., Chang C.L., Chiu I., Cho H.M., Clocchiatti A.,
Crawford T.M., Crites A.T., Desai S., Dietrich J.P., Dobbs M.A.,
Foley R.J., Forman W.R., George E.M., Gladders M.D., Gonzalez A.H.,
Halverson N.W., Hennig C., Hoekstra H., Holder G.P., Holzapfel W.L.,
Hrubes J.D., Jones C., Keisler R., Knox L., Lee A.T., Leitch E.M., Liu J.,
Lueker M., Luong-Van D., Mantz A., Marrone D.P., McDonald M., McMahon J.J.,
Meyer S.S., Mocanu L., Mohr J.J., Murray S.S., Padin S., Pryke C.,
Reichardt C.L., Rest A., Ruel J., Ruhl J.E., Saliwanchik B.R., Saro A.,
Sayre J.T., Schaffer K.K., Schrabback T., Shirokoff E., Song J.,
Spieler H.G., Stanford S.A., Staniszewski Z., Stark A.A., Story K.T.,
Stubbs C.W., Vanderlinde K., Vieira J.D., Vikhlinin A., Williamson R.,
Zahn O., Zenteno A.
<Astrophys. J. Suppl. Ser., 216, 27 (2015)>
=2015ApJS..216...27B 2015ApJS..216...27B
ADC_Keywords: Clusters, galaxy ; Redshifts ; Surveys
Keywords: cosmology: observations; galaxies: clusters: individual;
large-scale structure of universe
Abstract:
We present a catalog of galaxy clusters selected via their
Sunyaev-Zel'dovich (SZ) effect signature from 2500deg2 of South Pole
Telescope (SPT) data. This work represents the complete sample of
clusters detected at high significance in the 2500deg2 SPT-SZ
survey, which was completed in 2011. A total of 677 (409) cluster
candidates are identified above a signal-to-noise threshold of
ξ=4.5 (5.0). Ground- and space-based optical and near-infrared
(NIR) imaging confirms overdensities of similarly colored galaxies in
the direction of 516 (or 76%) of the ξ>4.5 candidates and 387 (or
95%) of the ξ>5 candidates; the measured purity is consistent with
expectations from simulations. Of these confirmed clusters, 415 were
first identified in SPT data, including 251 new discoveries reported
in this work. We estimate photometric redshifts for all candidates
with identified optical and/or NIR counterparts; we additionally
report redshifts derived from spectroscopic observations for 141 of
these systems. The mass threshold of the catalog is roughly
independent of redshift above z∼0.25 leading to a sample of massive
clusters that extends to high redshift. The median mass of the sample
is M500c(ρcrit)∼3.5x1014M☉h70-1, the median
redshift is zmed=0.55, and the highest-redshift systems are at
z>1.4. The combination of large redshift extent, clean selection, and
high typical mass makes this cluster sample of particular interest for
cosmological analyses and studies of cluster formation and evolution.
Description:
The South Pole Telescope (SPT) is a 10m diameter telescope located at
the National Science Foundation Amundsen-Scott South Pole station in
Antarctica. From 2008 to 2011 the telescope was used to conduct the
SPT-SZ survey, a survey of ∼2500deg2 of the southern sky at 95, 150,
and 220GHz. The survey covers a contiguous region from 20h to 7h in
right ascension (R.A.) and -65 to -40° in declination (see, e.g.,
Figure 1 in Story et al. 2013ApJ...779...86S 2013ApJ...779...86S) and was mapped to depths
of approximately 40, 18, and 70uK-arcmin at 95, 150, and 220GHz
respectively.
We use optical and in some cases NIR imaging (Blanco Telescope,
Magellan/Baade, Magellan/Clay, Swope, MPG/ESO, New Technology
Telescope, Spitzer, WISE) to confirm candidates as clusters and to
obtain redshifts for confirmed systems (see section 4).
We have also used a variety of facilities to obtain spectroscopic
observations of SPT clusters (including VLT/FORS2 & Gemini/GMOS-S).
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 97 677 Galaxy clusters above significance ξ=4.5 in
2500deg2 observed by the South Pole Telescope (SPT)
table5.dat 111 115 *Clusters with matches in other catalogs
refs.dat 100 61 References
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Note on table5.dat: Cluster candidates coincident with galaxy clusters
identified in other catalogs. We define a match if a candidate is within 5'
(2') of an identified cluster for clusters at z≤0.3 (z>0.3 or unconfirmed).
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See also:
VIII/88 : Planck Early Release Compact Source Catalogue (Planck, 2011)
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
IX/32 : ROSAT Bright Survey (Fischer+, 1998-2000)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
VII/175 : Edinburgh-Durham Southern Galaxy Cat. - Cluster Cat. (Lumsden+ 1992)
IX/15 : Einstein EMSS Survey (Gioia+ 1990, Stocke+ 1991)
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
VII/170 : Catalogue of Southern Peculiar Galaxies and Associations (Arp+, 1987)
VII/28 : Southern Groups and Clusters of Galaxies (Duus, Newell 1977)
J/ApJS/216/20 : Blanco Cosmology Survey (BCS) new reduction (Bleem+, 2015)
J/ApJS/213/25 : WISE Massive & Distant Clusters. II. (Stanford+, 2014)
J/ApJS/209/22 : SSDF survey: IRAC catalogs (Ashby+, 2013)
J/ApJ/774/23 : Chandra observations of SPT-SZ clusters (McDonald+, 2013)
J/ApJ/772/25 : Massive SZE clusters observations with ACT (Sifon+, 2013)
J/ApJ/763/127 : Galaxy clusters discovered in SPT survey (Reichardt+, 2013)
J/ApJ/761/22 : NIR galaxy cluster cand. in the SPT survey (Song+, 2012)
J/ApJ/757/83 : The Blanco Cosmology Survey (BCS) (Desai+, 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/534/A109 : MCXC Meta-Catalog X-ray galaxy Clusters (Piffaretti+, 2011)
J/ApJS/191/340 : Southern Cosmology Survey. II. (Menanteau+, 2010)
J/MNRAS/406/1318 : Lensed-arc statistics of galaxy clusters (Horesh+, 2010)
J/ApJ/719/763 : Millimeter-wave sources in the SPT survey (Vieira+, 2010)
J/ApJ/701/428 : The Spitzer Deep, Wide-Field Survey (SDWFS) (Ashby+, 2009)
J/AJ/137/4795 : Dynamical state of brightest cluster gal. (Coziol+, 2009)
J/A+A/499/357 : REFLEX galaxies redshifts (Guzzo+, 2009)
J/ApJ/684/905 : z>1 ClG from IRAC Shallow Survey (Eisenhardt+, 2008)
J/ApJS/172/561 : The 400d cluster Survey (Burenin+, 2007)
J/MNRAS/376/1073 : Sunyaev-Zel'dovich effect in galaxy clusters (Zemcov+, 2007)
J/other/JAD/12.1 : Cat. of galaxy structures based on the MRSS (Panko+, 2006)
J/A+A/425/367 : REFLEX Galaxy Cluster Survey catalogue (Boehringer+, 2004)
J/ApJS/140/239 : RASS: clusters of galaxies around SGP (Cruddace+, 2002)
J/AJ/122/2222 : Superclusters of Abell and X-ray clusters (Einasto+, 2001)
J/ApJS/129/435 : NORAS galaxy cluster survey. I. (Bohringer+, 2000)
J/ApJS/125/35 : ACO clusters redshifts & veloc. dispersions (Struble+ 1999)
J/ApJ/520/491 : Superclustering in Aquarius (Batuski+, 1999)
J/ApJ/514/148 : ROSAT survey of bright galaxies clusters (De Grandi+, 1999)
J/MNRAS/289/263 : Galaxy clusters from the APM galaxy survey (Dalton+ 1997)
J/MNRAS/281/799 : XBACs, the sample (Ebeling+, 1996)
J/A+A/310/8 : The ESO Nearby Abell Cluster Survey I. (Katgert+, 1996)
J/MNRAS/269/151 : APM cluster redshift survey (Dalton+, 1994)
http://pole.uchicago.edu/public/data/sptsz-clusters/ : SPT-SZ 2500d
galaxy cluster catalog home page
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- --- [SPT-CL]
8- 17 A10 --- SPT-CL The SPT identifier (1)
19 A1 --- f_SPT-CL [*] Cluster with X-ray (2)
21- 28 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
30- 37 F8.4 deg DEdeg Declination in decimal degrees (J2000)
39- 43 F5.2 --- xi [4.5/43] Highest detection significance
ξ in filtered map
45- 48 F4.2 arcmin theta [0/3] Best core radius θ
corresponding to the detection
50- 52 I3 10-6.arcmin2 YSZ [4/490] Integrated Sunyaev-Zel'dovich
Comptonization (3)
54- 55 I2 10-6.arcmin2 e_YSZ Uncertainty in YSZ
57- 60 A4 --- f_z Limit flag on z
63- 67 F5.3 --- z [0.05/1.5]? Redshift (4)
69 A1 --- n_z [+] Note on z (5)
71- 74 F4.2 --- e_z [0.01/0.2]? Uncertainty in z
76- 80 F5.2 10+14Msun M500c [2/17.3]? Enclosed mass (6)
82- 85 F4.2 10+14Msun e_M500c ? Uncertainty in M500c
87- 90 A4 --- Img Imaging notes (7)
92- 97 A6 --- Notes Additional notes (7)
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Note (1): Galaxy cluster candidates selected above a significance of 4.5 in
the 2500 degree SPT-SZ survey.
Note (2):
* = Cluster has X-ray data from the Chandra satellite that are used in the
cosmological analysis presented in T. de Haan et al. (in preparation).
Note (3): within a 0.75' aperture and multiplied by 106 (see section 3.2).
Note (4): For confirmed systems (except for the three highest-redshift systems;
see Section 5.3) or redshift lower limit for unconfirmed systems
(see Section 4). Spectroscopic redshifts are quoted without
uncertainties, which are typically∼0.1%
(see e.g., Ruel et al. 2014ApJ...792...45R 2014ApJ...792...45R).
Note (5):
+ = A spectroscopic redshift derived from SPT follow-up observations.
Note (6): Defined as the mass enclosed within a radius at which the average
density is 500 times the critical density at the cluster redshift.
Note (7): Note as follows:
1 = Bright star impedes confirmation.
2 = Possibly biased SZ-center owing to cluster's proximity to the edge of
the cluster map; additional cluster offset 1.8 arcmin at z∼0.55.
3 = Foreground group at z∼0.3.
4 = Foreground group to N at z∼0.35.
5 = Foreground group at z∼0.1.
6 = Group z∼0.2 centered 3 arcmin away from SPT center.
7 = Small group z∼0.4 offset 2 arcmin to N.
8 = Low-z group z∼0.1.
9 = Very complex region; optical group on NW z∼0.4 and another group
on SW z∼0.65. Confirmed in S12 by 1 method at z=0.38±0.04.
10 = Bimodal redshift solution; additional solution z=0.29.
11 = High stellar density.
12 = Foreground group at z∼0.15.
13 = Bimodal redshift solution; additional solution z=0.41.
14 = Group on SW z∼0.4.
15 = System z∼0.3 offset 2 arcmin to S.
16 = Possibly biased SZ-center owing to cluster's proximity to the
edge of the cluster map.
17 = The mass is biased low by a factor of ∼1.5 times owing to contamination
from a magnified high-redshift dusty star forming galaxy;
see Section 6.4.3 and discussion in Anderson et al.
(2011ApJ...738...48A 2011ApJ...738...48A).
18 = Low-z group at z∼0.15 >3arcmin from SPT center.
a = Strong-Lensing Cluster;
b = Cluster masses at low significance are only approximate;
see Section 6.1.
c = Cluster masses at low redshift (z<0.25) may be
underestimated; see Section 6.1.
d = Confirmed, high-redshift cluster (see Section 5.3).
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- --- [SPT-CL]
8- 17 A10 --- SPT-CL The SPT identifier
19 A1 --- f_SPT-CL Foreground cluster (1)
21- 41 A21 --- ID Name under which the cluster was first reported
43- 44 I2 --- r_ID ID reference (see refs.dat file)
46- 88 A43 --- Ref All catalogs which include the cluster
(see refs.dat file)
90- 94 F5.3 --- z [0.05/1.1] Redshift used in this work (2)
96- 99 F4.2 --- e_z [0.01/0.07]? z uncertainty (3)
101-106 F6.4 --- zlit ? Redshift from literature
108 A1 --- f_zlit p: photometric redshift (else spectroscopic)
110-111 I2 --- r_zlit ? zlit reference (see refs.dat file)
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Note (1): Flag as follows:
a = ACO 3338 is in the foreground.
b = [F81] 391/ACO 3685 is in the foreground.
c = ACO S1121 is in the foreground.
Note (2): The cluster redshift used in this work - either the photometric
redshift or a spectroscopic redshift obtained from follow-up
observations or the literature.
Note (3): We include error bars for red sequence redshifts but not
spectroscopic redshifts.
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Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode Bibcode
24- 50 A27 --- Aut Author's name(s)
52-100 A49 --- Comm Comment
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 04-Mar-2015