J/AJ/141/14 HST WFC3 ERS : emission-line galaxies (Straughn+, 2011)
Hubble Space Telescope WFC3 Early Release Science: emission-line galaxies from
infrared grism observations.
Straughn A.N., Kuntschner H., Kummel M., Walsh J.R., Cohen S.H.,
Gardner J.P., Windhorst R.A., O'Connell R.W., Pirzkal N., Meurer G.,
McCarthy P.J., Hathi N.P., Malhotra S., Rhoads J., Balick B., Bond H.E.,
Calzetti D., Disney M.J., Dopita M.A., Frogel J.A., Hall D.N.B.,
Holtzman J.A., Kimble R.A., Mutchler M., Paresce F., Saha A., Silk J.I.,
Trauger J.T., Walker A.R., Whitmore B.C., Young E.T., Xu C.
<Astron. J., 141, 14 (2011)>
=2011AJ....141...14S 2011AJ....141...14S
ADC_Keywords: Galaxies, IR ; Redshifts ; Spectroscopy ; Equivalent widths
Keywords: catalogs - galaxies: starburst - techniques: spectroscopic
Abstract:
We present grism spectra of emission-line galaxies (ELGs) from 0.6 to
1.6um from the Wide Field Camera 3 (WFC3) on the Hubble Space
Telescope. These new infrared grism data augment previous optical
Advanced Camera for Surveys G800L 0.6-0.95um grism data in GOODS-South
from the PEARS program, extending the wavelength coverage well past
the G800L red cutoff. The Early Release Science (ERS) grism field was
observed at a depth of two orbits per grism, yielding spectra of
hundreds of faint objects, a subset of which is presented here. ELGs
are studied via the Hα, [OIII], and [OII] emission lines
detected in the redshift ranges 0.2~<z~<1.4, 1.2~<z~<2.2, and
2.0~<z~<3.3, respectively, in the G102 (0.8-1.1um; R~=210) and G141
(1.1-1.6um; R~=130) grisms.
Description:
The ERS II program for WFC3 consists of both UV and IR observations of
about 30% of the GOODS-South field (Giavalisco et al., 2004, Cat.
II/261). Here we summarize the ERS II program; Windhorst et al.
(2011ApJS..193...27W 2011ApJS..193...27W) present the ERS II data reduction effort in
detail. Eight pointings were imaged with the UVIS channel (UV filters
F225W, F275W, and F336W at depths of 2 orbits/pointing/filter for
F225W and F275W and 1 orbit/pointing for F336W) and ten with the IR
channel (filters F098M, F125W, F160W) at 2 orbits/pointing/filter.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 86 73 Global properties of 51 emission-line galaxies (ELG)
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID [3/583] ID number <[SKK2011] NNN> in Simbad
4 A1 --- n_ID [ab] Note on source (1)
6- 15 F10.7 deg RAdeg Right ascension in decimal degrees (J2000)
17- 27 F11.7 deg DEdeg Declination in decimal degrees (J2000)
29- 33 F5.2 mag F098M HST/WFC3 F098M (Ys) AB magnitude
35- 39 I5 0.1nm lambda [800/16636] Wavelength of line
41- 46 F6.1 zW/m2 Flux ?=- Flux (10-18erg/cm2/s) (2)
48- 50 I3 zW/m2 e_Flux ? rms uncertainty on Flux
52- 54 I3 0.1nm EW ?=- Equivalent width of line (2)
56- 72 A17 --- Line Line identification (3)
73- 76 F4.1 Msun/yr SFR ?=- Stellar formation rate (2)
78 I1 Msun/yr e_SFR ? rms uncertainty on SFR
80- 84 F5.3 --- z ?=- Grism redshift, recalculated redshift
based on the line identification
86 I1 --- Flag ? Flag for source of input redshift used for
line identification (4)
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Note (1): Notes as follows:
a = CDF-S X-ray sources identified as an AGN by Szokoly et al.
(2004, Cat. J/ApJS/155/271)
b = New spectroscopic redshift (no previous photometric or spectroscopic
redshift measurements)
Note (2): No data in the case of fluxes (and EW, SFR) indicate that the spectrum
had a high level of contamination, but wavelengths were secure enough to
warrant redshift determination.
Note (3): No data indicates that no suitable line ID was found for the given
input redshift.
Note (4): Flags as follows:
1 = two lines visible in the spectrum, no prior redshift needed
2 = single line in the spectrum, line ID and grism redshift based on prior
spectroscopic redshift
3 = single line in the spectrum, line ID and grism redshift based on prior
photometric redshift.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Jul-2012