J/ApJ/669/714 Subaru weak-lensing survey. I. (Miyazaki+, 2007)
A Subaru weak-lensing survey.
I. Cluster candidates and spectroscopic verification.
Miyazaki S., Hamana T., Ellis R.S., Kashikawa N., Massey R.J., Taylor J.,
Refregier A.
<Astrophys. J., 669, 714-728 (2007)>
=2007ApJ...669..714M 2007ApJ...669..714M
ADC_Keywords: Clusters, galaxy ; Redshifts ; Gravitational lensing
Keywords: cosmology: observations - dark matter -
large-scale structure of universe
Abstract:
We present the results of an ongoing weak-lensing survey conducted
with the Subaru Telescope whose initial goal is to locate and study
the distribution of shear-selected structures, or halos. Using a
Suprime-Cam imaging survey spanning 21.82deg2, we present a catalog
of 100 candidate halos located from lensing-convergence maps. Our
sample is reliably drawn from that subset of our survey area (totaling
16.72deg2) uncontaminated by bright stars and edge effects and is
limited at a convergence signal-to-noise ratio of 3.69. To validate
the sample, detailed spectroscopic measures have been made for 26
candidates using the Subaru multiobject spectrograph, FOCAS. All are
confirmed as clusters of galaxies, but two arise as the superposition
of multiple clusters viewed along the line of sight. Including data
available in the literature and an ongoing Keck spectroscopic
campaign, a total of 41 halos now have reliable redshifts.
Description:
The imaging observations were largely carried out on 2003 May 1-4 and
September 27 as part of an "Intensive Program" of the Subaru
Telescope. The Lynx field was observed on 2003 January 29-30, SXDS
data were obtained from the public archive, and the COSMOS field was
observed on 2004 February 18 and 21.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 13 Suprime-Cam weak-lensing survey fields
table2.dat 130 101 Shear-selected Halos
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See also:
B/subaru : Log of Subaru Prime Focus Camera Exposures (ADAC NAOJ, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Field Field name
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 28 F4.2 deg+2 Area Field area covered by the several
Suprime-Cam pointings
30- 33 F4.2 deg+2 SArea Area used for the halo sample
35- 38 F4.2 arcsec Seeing Seeing (FWHM) (refers to average values of
the constituent pointings)
40- 43 F4.2 arcsec e_Seeing rms uncertainty on Seeing
45- 48 F4.1 arcmin-2 rhoGal Galaxy density (refers to average values of
the constituent pointings) (1)
50- 53 F4.1 arcmin-2 e_rhoGal rms uncertainty on rhoGal (1)
55- 57 I3 ks TexpR ?=- ROSAT exposure time
59- 61 I3 ks TexpC ?=- Chandra exposure time
63- 65 I3 ks TexpN ?=- XMM-Newton exposure time
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Note (1): the published paper indicates a unit of arcmin2
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Field Field name
14- 15 I2 --- Seq Sequential number within the field (1)
17- 31 A15 --- [MHE2007] Name (SL JHHMM.m+DDMM)
33- 38 F6.2 deg RAdeg Right ascension in decimal degrees (J2000)
40- 44 F5.2 deg DEdeg Declination in decimal degrees (J2000)
46- 49 F4.2 --- S/N Signal-to-noise ratio of the kappa-map
51- 55 F5.3 --- kappa κ value (dimensionless surface mass
density)
57- 58 I2 --- Ng Number of moderately bright (RC<22)
galaxies around the halo within 2'
60- 63 F4.2 --- zF1 ?=- Spectroscopic redshift obtained by FOCAS
64 A1 --- --- [,]
65- 68 F4.2 --- zF2 ?=- Spectroscopic redshift obtained by FOCAS
69 A1 --- --- [,]
70- 73 F4.2 --- zF3 ?=- Spectroscopic redshift obtained by FOCAS
75- 78 F4.2 --- z ?=- Cluster redshift found in the literature
(mainly from NED)
79 A1 --- n_z [P] P stands for a photometric redshift
81- 84 F4.2 --- zNEDG ?=- Redshift estimated from grouping of
galaxies whose redshifts are listed in NED
86-130 A45 --- Notes Notes
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Note (1): Sources identified as [MHE2007] Field NN in Simbad.
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History:
From electronic version of the journal
References:
Hamana et al. Paper II 2009PASJ...61..833H 2009PASJ...61..833H
(End) Patricia Vannier [CDS] 16-Jan-2010