J/MNRAS/414/28 VLT Lyman-break galaxy redshift survey. II. (Crighton+, 2011)
The VLT LBG redshift survey.
II. Interactions between galaxies and the IGM at z ∼ 3.
Crighton N.H.M., Bielby R., Shanks T., Infante L., Bornancini C.G.,
Bouche N., Lambas D.G., Lowenthal J.D., Minniti D., Morris S.L.,
Padilla N., Peroux C., Petitjean P., Theuns T., Tummuangpak P.,
Weilbacher P.M., Wisotzki L., Worseck G.
<Mon. Not. R. Astron. Soc., 414, 28-49 (2011)>
=2011MNRAS.414...28C 2011MNRAS.414...28C
ADC_Keywords: QSOs ; Redshifts ; Equivalent widths
Keywords: galaxies: high-redshift - intergalactic medium
Abstract:
We have measured redshifts for 243 z≈3 quasars in nine Very Large
Telescope (VLT) Visible Imaging and Multi-Object Spectrograph (VIMOS)
Lyman-break galaxy (LBG) redshift survey areas, each of which is
centred on a known bright quasar. Using the spectra of these quasars,
we measure the cross-correlation between neutral hydrogen gas causing
the Lyα forest and 1020 LBGs at z≈3.
Description:
We obtained galaxy spectra for this project using the VIMOS
multi-object spectrograph on the VLT.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 92 271 Quasars with z>2.1 for which we have obtained
AAOmega spectra
tablec3.dat 52 176 CIV systems identified towards quasars in both
our high and low resolution samples
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See also:
J/MNRAS/430/425 : VLT LBG Redshift Survey. III. (Bielby+, 2013)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Quasar sequential number
5- 28 A24 --- Name Quasar name
30- 40 A11 --- Field Field name
42- 43 I2 h RAh Right ascension (J2000)
45- 46 I2 min RAm Right ascension (J2000)
48- 52 F5.2 s RAs Right ascension (J2000)
54 A1 --- DE- Declination sign (J2000)
55- 56 I2 deg DEd Declination (J2000)
58- 59 I2 arcmin DEm Declination (J2000)
61- 64 F4.1 arcsec DEs Declination (J2000)
66- 69 F4.2 --- z Redshift
71- 74 F4.1 mag Rmag R magnitude
76 A1 --- O/lap? [y/n] Indicates whether the quasar overlaps
the LBG survey fields
78- 92 A15 --- Com Comments showing the manner in which the
quasar was selected (1)
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Note (1): The abbreviations in the comments field are:
WW = taken from Worseck & Wisotki (2008, Cat. J/A+A/487/539)
Wil = A spectrum for this quasar was available from Williger et
al. (1996ApJS..104..145W 1996ApJS..104..145W)
NED = selected from the NED database
SDSS = selected using single epoch SDSS imaging
Schmidt = selected using Schmidt plate imaging
Stripe 82 = selected using Stripe 82 imaging
photo-z = this quasar was a candidate with a photometric redshift
from Richards et al. (2004, Cat. J/ApJS/155/257 and
2009, Cat. J/ApJS/180/67)
Central Imaging = selected using the central imaging described in table2
VIMOS serendip. = discovered in our VIMOS LBG observations
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Table 2: Imaging used to select quasar candidates inside the central LBG regions
and surrounding the central regions.
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Central imaging Surrounding imaging
Field Source Bands Area Depth Source Band Depth
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Q2359+0653 Mosaic UBR 32x32arcmin2 R=25 Schmidt BR R=21
Q0042-2627 Mosaic UBR 32x32arcmin2 R=24.7 Schmidt BR R=21
J0124+0044 Mosaic a UBVI 32x32arcmin2 I=24.5 SDSS Stripe 82 ugriz r=24.7
Q0301-0035 Mosaic UBR 32x32arcmin2 R=25 SDSS Stripe 82 ugriz r=24.7
HE 0940-1050 MegaCam ugri 1x1°2 r=24.7 Schmidt UBR R=21
J1201+0116 Mosaic UBR 32x32arcmin2 R=25.5 SDSS ugriz r=22.6
PKS 2126-158 Mosaic UBR 32x32arcmin2 R=24.7 Schmidt UBR R=21
Q2231-0015 WFC UBR 32x32arcmin2 r=25 SDSS ugriz r=22.6
Q2348-011 MegaCam ugri 1x1°2 r=25 SDSS Stripe 82 ugriz r=24.7
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Note on Source: a: For the J0124+004 field, we selected targets in the central
region from an object catalogue generated from Mosaic imaging.
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Byte-by-byte Description of file: tablec3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Abs Sequential absorber number
5- 15 A11 --- Field Absorber field name
17- 19 I3 --- Seq Sequential number of quasar toward which
the absorber was seen
21- 24 F4.2 --- zqso Quasar redshift
26- 32 F7.5 --- zabs Absorber redshift
34- 40 F7.5 --- e_zabs rms uncertainty on zabs
42- 46 F5.3 0.1nm EW Observed equivalent width
48- 52 F5.3 0.1nm e_EW rms uncertainty on EW
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History:
From electronic version of the journal
References:
Bielby et al., Paper I 2011MNRAS.414....2B 2011MNRAS.414....2B
Bielby et al., Paper III 2013MNRAS.430..425B 2013MNRAS.430..425B, Cat. J/MNRAS/430/425
(End) Patricia Vannier [CDS] 09-Jan-2012