J/ApJ/665/921 Redshift survey in the field of A1689 (Frye+, 2007)
The Sextet Arcs: a strongly lensed Lyman break galaxy in the ACS spectroscopic
galaxy survey toward Abell 1689.
Frye B.L., Coe D., Bowen D.V., Benitez N., Broadhurst T., Guhathakurta P.,
Illingworth G., Menanteau F., Sharon K., Lupton R., Meylan G., Zekser K.,
Meurer G., Hurley M.
<Astrophys. J., 665, 921-935 (2007)>
=2007ApJ...665..921F 2007ApJ...665..921F
ADC_Keywords: Clusters, galaxy ; Redshifts ; Photometry, HST
Keywords: galaxies: clusters: general - galaxies: clusters: individual (A1689) -
galaxies: high-redshift - gravitational lensing -
methods: data analysis - techniques: spectroscopic
Abstract:
We present results of the HST Advanced Camera for Surveys
spectroscopic ground-based redshift survey in the field of A1689.
We measure 98 redshifts, increasing the number of spectroscopically
confirmed objects sixfold. We present two spectra from this catalog of
the Sextet Arcs, images that arise from a strongly lensed Lyman break
galaxy (LBG) at a redshift of z=3.038. Gravitational lensing by the
cluster magnifies its flux by a factor of ∼16 and produces six
separate images with a total r-band magnitude of r625=21.7. The two
spectra, each of which represents emission from different regions of
the LBG, show HI and interstellar metal absorption lines at the
systemic redshift.
Description:
Abell 1689 was observed in 2002 June as part of HST ACS GTO time. Deep
exposures were taken in the g475, r625, i775, and z850
passbands, reaching limiting magnitudes of 27.5, 27.2, 27.2, and 26.7,
respectively. The U-band image was acquired from the DuPont Telescope
at Las Campanas. The B-band image was acquired from the Nordic Optical
Telescope (NOT) at La Palma. Broadband V, R, and I images and a
narrowband Z-band image taken with the NB9148 filter were obtained in
1999 March with the Low Resolution Imaging Spectrometer (LRIS) on Keck
II. J, H, and Ks images were obtained with Son of Isaac (SOFI) on the
ESO New Technology Telescope (NTT). A complementary Ks-band Infrared
Spectrometer and Array Camera (ISAAC) VLT image was also analyzed.
Spectroscopic observations were carried out at the Keck Observatory,
the Very Large Telescope (VLT), and the Las Campanas Magellan-Clay
Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 15 Objects at z>2.5 in the A1689 Field
table3.dat 76 91 Spectroscopic identification of z<2.5 objects
toward A1689
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See also:
J/A+A/382/60 : BVR photometry in Abell 1689 (Duc+, 2002)
J/MNRAS/335/10 : Hα survey of Abell 1689 (Balogh+, 2002)
J/ApJ/621/53 : Multiple arc systems in A1689 (Broadhurst+, 2005)
J/MNRAS/372/1425 : Abell 1689 gravitational lensing analysis (Halkola+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 12 F6.3 s RAs Right ascension (J2000.0)
14 A1 --- DE- Declination sign (J2000.0)
15- 16 I2 deg DEd Declination (J2000.0)
18- 19 I2 arcmin DEm Declination (J2000.0)
21- 25 F5.2 arcsec DEs Declination (J2000.0)
27- 29 F3.1 --- [BBC2005] ? Broadhurst et al. (2005, J/ApJ/621/53)
name (1)
31- 35 F5.3 --- zsp ? Spectroccopic redshift
37- 41 F5.3 --- e_zsp ? rms uncertainty on zsp
42 A1 --- r_zsp [abcd] Redshift reference (2)
44- 47 F4.2 --- zph Bayesian photometric redshift
49- 52 F4.2 --- E_zph ? Error on zph (upper limit)
54- 57 F4.2 --- e_zph ? Error on zph (lower limit)
59 A1 --- l_g475 Limit flag on g475
60- 64 F5.2 mag g475 ? g475 magnitude
66- 69 F4.2 mag e_g475 ? rms uncertainty on g475
71- 75 F5.2 mag r625 ? r625 magnitude
77- 80 F4.2 mag e_r625 ? rms uncertainty on r625
82- 86 F5.2 mag i775 ? i775 magnitude
88- 91 F4.2 mag e_i775 ? rms uncertainty on i775
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Note (1): Sources 1.1-1.6 comprise the Sextet, and
sources 2.1-2.5 comprise the Quintet.
Note (2): References as follows:
b = Broadhurst et al. (2005, Cat. J/ApJ/621/53)
c = Frye et al. (2002ApJ...568..558F 2002ApJ...568..558F)
d = This paper
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 12 F6.3 s RAs Right ascension (J2000.0)
14 A1 --- DE- Declination sign (J2000.0)
15- 16 I2 deg DEd Declination (J2000.0)
18- 19 I2 arcmin DEm Declination (J2000.0)
21- 25 F5.2 arcsec DEs Declination (J2000.0)
27- 31 F5.3 --- zspec ? Spectroccopic redshift
33- 37 F5.2 mag Imag ?=- I magnitude, in AB system
39- 42 F4.2 mag e_Imag ?=- rms uncertainty on Imag
44- 47 F4.2 --- zph ?=- Bayesian photometric redshift
49- 52 F4.2 --- E_zph ?=- Error on zph (upper limit)
54- 57 F4.2 --- e_zph ?=- Error on zph (lower limit)
59- 66 A8 --- Date Observation date
68- 76 A9 --- Tel Telescospe used
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Nomeclature note:
Sources identified as [FCB2007] JHHMMSS.sss+DDMMSS.ss in Simbad.
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 05-Sep-2009