J/ApJ/812/114 Grism Lens-Amplified Survey from Space (GLASS). I. (Treu+, 2015)
The Grism Lens-Amplified Survey from Space (GLASS).
I. Survey overview and first data release.
Treu T., Schmidt K.B., Brammer G.B., Vulcani B., Wang X., Bradac M.,
Dijkstra M., Dressler A., Fontana A., Gavazzi R., Henry A.L., Hoag A.,
Huang K.-H., Jones T.A., Kelly P.L., Malkan M.A., Mason C., Pentericci L.,
Poggianti B., Stiavelli M., Trenti M., von der Linden A.
<Astrophys. J., 812, 114 (2015)>
=2015ApJ...812..114T 2015ApJ...812..114T (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Spectra, infrared ; Galaxies, IR ; Redshifts ;
Surveys
Keywords: gravitational lensing: strong
Abstract:
We give an overview of the Grism Lens Amplified Survey from Space
(GLASS), a large Hubble Space Telescope program aimed at obtaining
grism spectroscopy of the fields of 10 massive clusters of galaxies at
redshift z=0.308-0.686, including the Hubble Frontier Fields (HFF).
The Wide Field Camera 3 (WFC3) yields near-infrared spectra of the
cluster cores covering the wavelength range 0.81-1.69µm through
grisms G102 and G141, while the Advanced Camera for Surveys in
parallel mode provides G800L spectra of the infall regions of the
clusters. The WFC3 spectra are taken at two almost orthogonal position
angles in order to minimize the effects of confusion. After
summarizing the scientific drivers of GLASS, we describe the sample
selection as well as the observing strategy and data processing
pipeline. We then utilize MACS J0717.5+3745, a HFF cluster and the
first one observed by GLASS, to illustrate the data quality and the
high-level data products. Each spectrum brighter than HAB=23 is
visually inspected by at least two co-authors and a redshift is
measured when sufficient information is present in the spectra.
Furthermore, we conducted a thorough search for emission lines through
all of the GLASS WFC3 spectra with the aim of measuring redshifts for
sources with continuum fainter than HAB=23. We provide a catalog of
139 emission-line-based spectroscopic redshifts for extragalactic
sources, including three new redshifts of multiple image systems (one
probable, two tentative).
Description:
In this paper we give an overview of Grism Lens Amplified Survey from
Space (GLASS; PI Treu; GO 13459) and we present the first release of
the data for MACS J0717.5+3745, the first cluster targeted by the
survey. Spectra for 1151 galaxies down to magnitude HAB=24 (F140W)
have been visually inspected by members of our team to ensure quality
control.
GLASS is a cycle-21 large program with the Hubble Space Telescope
(HST), targeting 10 massive clusters, including the 6 Frontier Fields,
using the WFC3 and ACS grisms. The program consists of 140 primary
orbits (with the G102 and G141 grisms; range 0.81-1.69µm) and 140
parallel orbits (with the G800L grism).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 10 Sample properties
table3.dat 67 247 Redshift catalog for MACS J0717.5+3745
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
II/261 : GOODS initial results (Giavalisco+, 2004)
J/AJ/149/178 : Redshift cat. of galaxies in GOODS-South field (Morris+, 2015)
J/ApJ/811/29 : GLASS. IV. Lensing cluster Abell 2744 (Wang+, 2015)
J/ApJ/803/34 : z∼4-10 galaxies from HST legacy fields (Bouwens+, 2015)
J/ApJS/211/21 : Spectroscopic redshifts of galaxies in MACS (Ebeling+, 2014)
J/ApJS/208/20 : Nine-year WMAP point source catalogs (Bennett+, 2013)
J/ApJ/772/48 : Emission-line galaxies from PEARS. II. (Pirzkal+, 2013)
J/ApJ/765/140 : Stacked spectra of SDSS star forming galaxies (Andrews+, 2013)
J/MNRAS/428/1128 : UDS/COSMOS HiZELS galaxies (Sobral+, 2013)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/AJ/141/14 : HST WFC3 ERS : emission-line galaxies (Straughn+, 2011)
J/ApJ/648/7 : Lyα emitters at z=6.5 in SDF (Kashikawa+, 2006)
J/ApJ/630/206 : Hα data for 3 EDisCS galaxy clusters (Finn+, 2005)
J/ApJ/591/53 : I photometry of Cl 0024+16 (Treu+, 2003)
J/ApJS/122/51 : Spectroscopic cat. of 10 rich galaxy clusters (Dressler+ 1999)
http://archive.stsci.edu/prepds/glass/ : GLASS on MAST home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Cl Cluster name
16- 17 I2 h RAh Hour of right ascension (J2000)
19- 20 I2 min RAm Minute of right ascension (J2000)
22- 25 F4.1 s RAs Second of right ascension (J2000)
27 A1 --- DE- Sign of declination (J2000)
28- 29 I2 deg DEd Degree of declination (J2000)
31- 32 I2 arcmin DEm Arcminute of declination (J2000)
34- 35 I2 arcsec DEs Arcsecond of declination (J2000)
37- 41 F5.3 --- z [0.3/0.7] Redshift
43- 52 A10 --- HST Main sources of HST imaging (1)
54- 60 A7 --- SST Main sources of Spitzer imaging (2)
62- 66 F5.2 10+37W Lx [8.1/47.4] X-ray luminosity in 1044erg/s (3)
68- 71 F4.2 10+37W e_Lx [0.3/1.6] Lx uncertainty
73- 77 F5.2 10+14Msun M500 [6.6/25] M500 (from Mgas) in 1014M☉
79- 82 F4.2 10+14Msun e_M500 [0.8/3.3] M500 uncertainty
84- 93 A10 --- DR1 First release (4)
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Note (1):
HFF = Hubble Frontier Field initiative (J. Lotz et al. 2015, in preparation)
http://www.stsci.edu/hst/campaigns/frontier-fields/
CLASH = Cluster Lensing And Supernova survey with Hubble (Multi-Cycle
Treasury program 12065; PI: Marc Postman).
http://archive.stsci.edu/prepds/clash/
Note (2): SURFSUP = Spitzer UltRa Faint SUrvey Program: Cluster Lensing and
Spitzer Extreme Imaging Reaching Out to z∼7 (#90009 PI Bradac,
co-PI Schrabback) is a joint Spitzer and HST Exploration Science
Spitzer program.
http://bradac.physics.ucdavis.edu/SurfsUp.html
http://irsa.ipac.caltech.edu/data/SPITZER/Frontier/
Note (3): X-ray luminosity from Mantz et al. 2010MNRAS.406.1773M 2010MNRAS.406.1773M
Note (4): Target date for the first public data release (F=Fall, S=Summer,
W=Winter).
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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- 5 I05 --- ID [00036-92358] GLASS identifier
(00036-02574 and 90082-92358) (1)
7- 18 F12.8 deg RAdeg [109.36/109.42] Right Ascension (J2000)
20- 31 F12.9 deg DEdeg [37.72/37.78] Declination (J2000)
33- 40 F8.5 --- z [0/2.6]?=-1 GLASS redshift (2)
42- 48 F7.5 --- q_z [0/4]? Quaility of z (3)
50- 56 F7.5 --- f_z [0/1] Flag indicating multiple z solutions (4)
58- 67 A10 --- Note Additional notes (5)
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Note (1): IDs on the format 0xxxx refer to the publicly available
GLASS MACS0717 v001 data release available at
http://archive.stsci.edu/prepds/glass/
IDs on the format 9xxxx refer to a data reduction with more
aggressive SExtractor de-blending and detection parameters, to
accommodate detection of object near bright objects not de-blended
in the default data-release reduction. These reduction products are
available upon request to the authors.
Note (2): Assigned from visual inspection (using GLASS inspection GUI for
redshifts (GiGz) v1.0:
http://github.com/kasperschmidt/GLASSinspectionGUIs)
of the Individual spectra and automatic redshift fits to the GLASS
spectra combined with the CLASH photometry.
Star (z=0.00000) are also indicated in column Note (36 sources).
Note (3): From the GiGz inspections. Fractional qualities come from the
combination of multiple redshift inspections. Quality of z as follows:
0 = no redshift (58 sources);
1 = tentative redshift (14 sources);
2 = possible redshift;
3 = probable redshift;
4 = secure redshift.
Note (4): The entry is 1 if the redshift is based on a single line and multiple
identifications are possible. Fractional values come from the
combination of multiple visual inspections.
Note (5): Multiple image names follow the convention of
Diego et al. 2015MNRAS.451.3920D 2015MNRAS.451.3920D
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History:
From electronic version of the journal
References:
Treu et al. Paper I. 2015ApJ...812..114T 2015ApJ...812..114T This catalog.
Jones et al. Paper II. 2015AJ....149..107J 2015AJ....149..107J
Schmidt et al. Paper III. 2016ApJ...818...38S 2016ApJ...818...38S
Wang et al. Paper IV. 2015ApJ...811...29W 2015ApJ...811...29W J/ApJ/811/29
Vulcani et al. Paper V. 2015ApJ...814..161V 2015ApJ...814..161V
Hoag et al. Paper VI. 2016ApJ...831..182H 2016ApJ...831..182H J/ApJ/831/182
Vulcani et al. Paper VII. 2016ApJ...833..178V 2016ApJ...833..178V J/ApJ/833/182
Vulcani et al. Paper VIII. 2017ApJ...837..126V 2017ApJ...837..126V
Morishita et al. Paper IX. 2017ApJ...835..254M 2017ApJ...835..254M J/ApJ/835/254
Wang et al. Paper X. 2017ApJ...837...89W 2017ApJ...837...89W
Schmidt et al. Paper XI. 2017ApJ...839...17S 2017ApJ...839...17S
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Feb-2016