J/ApJ/750/168 Redshift survey in the Subaru GTO2deg2 field (Kurtz+, 2012)
Testing weak-lensing maps with redshift surveys: a Subaru field.
Kurtz M.J., Geller M.J., Utsumi Y., Miyazaki S., Dell'Antonio I.P.,
Fabricant D.G.
<Astrophys. J., 750, 168 (2012)>
=2012ApJ...750..168K 2012ApJ...750..168K
ADC_Keywords: Redshifts ; Spectroscopy ; Photometry, SDSS ; Galaxies, optical ;
Surveys ; Gravitational lensing ; Clusters, galaxy
Keywords: cosmology: observations - galaxies: clusters: general -
galaxies: distances and redshifts - gravitational lensing: weak -
large-scale structure of Universe
Abstract:
We use a dense redshift survey in the foreground of the Subaru
GTO2deg2 weak-lensing field (centered at 16:04:44+43:11'24 (2000)
to assess the completeness and comment on the purity of massive halo
identification in the weak-lensing map. The redshift survey (published
here) includes 4541 galaxies; 4405 are new redshifts measured with the
Hectospec on the MMT. Among the weak-lensing peaks with a signal to
noise greater than 4.25, 2/3 correspond to individual massive systems;
this result is essentially identical to the Geller et al.
(2010ApJ...709..832G 2010ApJ...709..832G) test of the Deep Lens Survey (DLS) field F2.
The Subaru map, based on images in substantially better seeing than
the DLS, enables detection of less massive halos at fixed redshift as
expected. We demonstrate that the procedure adopted by Miyazaki et al.
(2002ApJ...580L..97M 2002ApJ...580L..97M) for removing some contaminated peaks from the
weak-lensing map improves agreement between the lensing map and the
redshift survey in the identification of candidate massive systems.
Description:
Miyazaki et al. (2002ApJ...580L..97M 2002ApJ...580L..97M, 2007, Cat. J/ApJ/669/714) used
the 8.2m Subaru Telescope to carry out a weak-lensing survey of 13
well-separated fields covering a total of 21.82deg2. They used
lensing convergence maps to identify 100 candidate halos with S/N
ν>3.7; 10 of these candidates are within the GTO2deg2 field we
examined here.
We constructed the galaxy catalog from the Sloan Digital Sky Survey
(SDSS; Adelman-McCarthy et al. 2008, Cat. II/294) r-band galaxy list
for the GTO2deg2 field. We acquired spectra for the objects with the
Hectospec, a 300-fiber robotic instrument mounted on the MMT from 2009
February 1 to 2009 April 27. The spectra cover the wavelength range
3500-10000Å with a resolution of ∼6Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 75 4541 Redshifts in the GTO2deg2 field
table3.dat 64 14 Velocity dispersions of GTO2deg2 weak-lensing
candidate clusters
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See also:
B/subaru : Log of Subaru Prime Focus Camera Exposures (ADAC NAOJ, 2007)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/ApJ/748/56 : K2-detected clusters in the CFHTLS-W1 field (Shan+, 2012)
J/A+A/546/A79 : 400d Cluster Survey Weak Lensing Programme II (Israel+ 2012)
J/MNRAS/413/1145 : Galaxy clusters in the COSMOS field (Bellagamba+, 2011)
J/ApJ/669/714 : Subaru weak-lensing survey. I. (Miyazaki+, 2007)
J/ApJ/660/239 : MaxBCG cat. of 13823 galaxy clusters from SDSS (Koester+, 2007)
J/A+A/470/821 : BLOX Cluster catalog (Dietrich+, 2007)
J/AJ/126/2152 : Cluster And Infall Region Nearby Survey. I (Rines+, 2003)
J/ApJS/122/51 : Spectroscopic cat. of 10 rich galaxy clusters (Dressler+ 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 I18 --- objID SDSS object identifier
20- 27 F8.4 deg RAdeg [240.05/242.42] Right Ascension (J2000)
29- 35 F7.4 deg DEdeg [42.55/43.83] Declination (J2000)
37- 43 F7.5 --- z [0.01/1.1] Redshift
45- 51 F7.5 --- e_z Error in z
53- 57 F5.2 mag rmag [13.82/26.99] SDSS Petrosian r band magnitude
59- 63 F5.2 mag g-r [-0.1/3.1] SDSS fiber (g-r) color index
65- 69 F5.2 mag r-i [-0.9/1.9] SDSS fiber (r-i) color index
71- 75 A5 --- r_z Source of redshift: Hecto or SDSS (1)
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Note (1): Source are:
Hecto = Hectospec Redshift Survey of the GTO2deg2 Field;
SDSS = Sloan Digital Sky Survey.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Rank [0/37] Rank of the convergence map peak (1)
4 A1 --- f_Rank [*bc] Flag on Rank (2)
6- 13 F8.6 --- nu [2.9/5.8]? Significance ν
15- 24 F10.6 deg RAdeg [240/242]? Right ascension (J2000)
26- 34 F9.6 deg DEdeg [42/44]? Declination (J2000)
36- 40 F5.3 --- z [0.1/0.7]? Redshift
42- 44 I3 km/s Sig3 [463/639]? Rest-frame line-of-sight velocity
dispersion for the 3' sample (σrf,3)
46- 47 I2 --- N3 [5/20]? Number of galaxies for the 3' sample
49- 51 I3 km/s e_Sig3 [58/180]? Sig3 uncertainty
53- 55 I3 km/s Sig6 [419/639]? Rest-frame line-of-sight velocity
dispersion for the 6' sample (σrf,6)
57- 58 I2 --- N6 [6/29]? Number of galaxies for the 6' sample
60- 62 I3 km/s e_Sig6 [48/156]? Sig6 uncertainty
64 A1 --- Ct [y] Count excess (3)
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Note (1): Large numbers are reliable peaks; small numbers are unreliable peaks.
See Figure 9.
Note (2): Flag as follows:
* = These weak-lensing map peaks are not secure because they are within
4 arcmin of a bright star or within 2.7 arcmin of the survey boundary.
b = This cluster is A2158.
c = We identify this system from the redshift survey alone, but it is
coincident with a weak-lensing peak significant at ν=2.9. The lensing
peak is not secure because the cluster is too close to the survey boundary.
Note (3): A "y" means there is a >2σS excess in the faint galaxy count
for 21<RC<23 in the direction of the weak-lensing peak (with
σS = the standard deviation of the pixel value in the map of
counts). See section 4.1 for further explanations.
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History:
From electronic version of the journal
References:
Geller et al. Paper I. 2010ApJ...709..832G 2010ApJ...709..832G
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Dec-2013