J/ApJ/592/728 Lyman break galaxies at redshift z∼3 (Steidel+, 2003)
Lyman break galaxies at redshift z∼3: survey description and full data set.
Steidel C.C., Adelberger K.L., Shapley A.E., Pettini M., Dickinson M.,
Giavalisco M.
<Astrophys. J. 592, 728 (2003)>
=2003ApJ...592..728S 2003ApJ...592..728S
ADC_Keywords: Galaxy catalogs ; Photometry ; Redshifts
Keywords: catalogs - galaxies: evolution - galaxies: high-redshift
Abstract:
We present the basic data for a large ground-based spectroscopic
survey for z∼3 Lyman break galaxies (LBGs), photometrically selected
using rest-UV colors from very deep images in 17 high Galactic
latitude fields. The total survey covers an area of 0.38deg2 and
includes 2347 photometrically selected candidate LBGs to an apparent
{R}AB magnitude limit of 25.5. Approximately half of these objects
have been observed spectroscopically using the Keck telescopes,
yielding 940 redshifts with =2.96±0.29. We discuss the images,
photometry, target selection, and spectroscopic program in some detail
and present catalogs of the photometric and spectroscopic data, made
available in electronic form. We discuss the general utility of
conducting nearly volume-limited redshift surveys in prescribed
redshift intervals using judicious application of photometric
preselection.
Description:
The imaging data for the 17 fields presented here were
obtained during the interval 1994-2000 on a number of telescopes,
detailed in Table 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 110 65 Deep Imaging Observations
table7.dat 97 28 Q2233+1341 Field LBGs
table8.dat 84 100 CDFa Field LBGs
table9.dat 80 121 CDFb Field LBG
table10.dat 100 96 Q0201+1120 Field LBs
table11.dat 87 122 Q0256-000 Field LBGs
table12.dat 81 192 Q0302-003 Field LBGs
table13.dat 101 78 B20902+34 Field LBGs
table14.dat 81 211 Q0933+289 Field LBGs
table15.dat 103 146 HDF-N Field LBGs
table16.dat 99 334 Westphal Field LBGs
table17.dat 84 51 3C 324 Field LBGs
table18.dat 85 454 Q1422+2309 Field LBGs
table19.dat 102 171 SSA22a Field LBGs
table20.dat 99 99 SSA22b Field LBGs
table21.dat 81 121 DSF2237a Field LBGs
table22.dat 81 176 DSF2237b Field LBGs
table23.dat 81 94 Q2233+1341 Field LBGs
notes.dat 80 30 Individual notes
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See also:
J/ApJ/519/1 : Lyman-break galaxies at z≳4 (Steidel+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Field Field name
13- 14 I2 h RAh Field center right ascension (J2000.0)
16- 17 I2 min RAm Field center right ascension (J2000.0)
19- 23 F5.2 s RAs Field center right ascension (J2000.0)
25 A1 --- DE- Field center declination sign (J2000.0)
26- 27 I2 deg DEd Field center declination (J2000.0)
29- 30 I2 arcmin DEm Field center declination (J2000.0)
32- 35 F4.1 arcsec DEs Field center declination (J2000.0)
37- 40 A4 --- Filt Filter (G1)
42- 69 A28 --- Tel Telescope and date (2)
71- 75 F5.3 arcsec Scale Pixel scale
77- 80 F4.2 arcsec FWHM FWHM
82- 86 I5 s ExpTime Exposition time
88- 92 F5.2 arcmin Dim1 Dimension
93 A1 --- --- [x]
94- 98 F5.2 arcmin Dim2 Dimension
100-104 F5.1 arcmin+2 Area Area
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Note (2): Telescopes are designated as follows:
P200 = Palomar 5.08-m telescope
WHT = William Herschel 4.2-m telescope
LCO = Las Campanas Observatory du Pont 2.5-m telescope
NTT = ESO 3.6-m New Technology Telescope
KPNO = Kitt Peak 4-m Mayall telescope
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Byte-by-byte Description of file: table[7-9].dat table??.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name Object name (Field-Identifier)
18- 19 I2 h RAh Hour of Right Ascension (J2000)
21- 22 I2 min RAm Minute of Right Ascension (J2000)
24- 28 F5.2 s RAs Second of Right Ascension (J2000)
30 A1 --- DE- Sign of the Declination (J2000)
31- 32 I2 deg DEd Degree of Declination (J2000)
34- 35 I2 arcmin DEm Arcminute of Declination (J2000)
37- 40 F4.1 arcsec DEs Arcsecond of Declination (J2000)
42- 46 F5.2 mag Rmag The {R} band magnitude (G1)
48- 52 F5.2 mag G-R The (G-{R}) color (G1)
54- 58 F5.2 mag U-G The (Un-G) color (G1)
60 A1 --- u_z-em Uncertainty flag on z-em
62- 67 F6.3 --- z-em Redshift derived from emission lines (1)
69 A1 --- u_z-abs Uncertainty flag on z-abs
71- 76 F6.3 --- z-abs Redshift derived from absorption lines (1)
78- 81 A4 --- Type Object type
83-105 A23 --- n_Name Notes on Name (2)
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Note (1): Special values of the redshift are used:
-1.000: Entries of -1.000 in the redshift column indicate that
a candidate has never been attempted spectroscopically;
-2.000: in both the z-em and z-abs columns indicates that the
object has been observed spectroscopically but no reliable
redshift resulted.
Objects whose redshift measurement depended only on emission lines
(usually Lyman α only, for all but the AGN) have a -2.000 in the
z-abs column, and those objects without measurable emission lines have
-2.000 in the z-em column.
Note (2): Notes are marked as follows:
a = "S96-CNN" indicates object names appearing in
Steidel et al. (1996ApJ...462L..17S 1996ApJ...462L..17S, [SH92] QSO 0000-263 NN in Simbad)
b = This object is discussed in Macchetto et al. (1993ApJ...404..511M 1993ApJ...404..511M)
and Giavalisco et al. (1994A&A...288..103G 1994A&A...288..103G, 1995ApJ...441L..13G 1995ApJ...441L..13G)
c = Objects discussed in Ellison et al. (2001ApJ...549..770E 2001ApJ...549..770E)
d = This galaxy was previously known as Q0201-C6 in Pettini et al.
(2001ApJ...554..981P 2001ApJ...554..981P) and in Shapley et al. (2001ApJ...562...95S 2001ApJ...562...95S)
o = Objects observed in the near-IR are indicated with their old
designations as in Shapley et al. (2001ApJ...562...95S 2001ApJ...562...95S)
(for cross-referencing, [PKS98] Q0256-000 ANN in Simbad).
e = Object within central HDF region observed with HST; designation
as published in Steidel et al. (1996AJ....112..352S 1996AJ....112..352S);
f = Object within central HDF WFPC-2 region; designation as published
in Williams et al. (1996AJ....112.1335W 1996AJ....112.1335W);
g = Redshift from Lowenthal et al. (1997ApJ...481..673L 1997ApJ...481..673L).
h = For purely historical reasons, a number of objects in this field
have been published under slightly different names. For such
cases, the previous designation is given in this column.
i = This object does not satisfy the LBG color selection criteria,
but is of interest because it is near Q1422+2309 on the plan of
the sky and is at close to the same redshift.
j = Objects whose photometry satisfies our LBG selection criteria,
but which have been discussed under alternative names, are
indicated in this column.
"S96" refers to Steidel et al. (1996ApJ...462L..17S 1996ApJ...462L..17S
[SGP96] SSA 22 ANN in Simbad), and
"S98" refers to Steidel et al. (1998ApJ...492..428S 1998ApJ...492..428S,
[SAD98] SSA 22a ANN, [SAD98] SSA 22a AANN in Simbad).
Objects which at one time satisfied our selection criteria, and
which were spectroscopically observed, are included at the end
of the table (see appendix of the paper).
k = This object appeared as a member of the z=3.09 "spike" in
Steidel et al. (1998ApJ...492..428S 1998ApJ...492..428S), called "SSA22b-D27".
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1 A1 --- Note [a-o] Note number (may be repeated)
4- 80 A77 --- Text Tet of note
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Global notes:
Note (G1): Filters are designated by:
Un = Identical to SDSS u' filter (both Un and SDSS u' cut at
4000Å on the red side, about 200Å blueward of the
standard Johnson U passband)
{R} = bandpass centered at 6830Å and
half-power bandwidth of ∼1250Å
G = Same effective wavelength as the SDSS g' filter but slightly narrower
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History:
* 10-Oct-2003: From electronic version of the journal
* 04-Feb-2005: One reference corrected in ReadMe
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 10-Oct-2003