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J/A+A/508/133      Damped Lymanα absorbers in z>4 QSOs  (Guimaraes+, 2009)

Damped and sub-damped Lyman-α absorbers in z > 4 QSOs. Guimaraes R., Petitjean P., De Carvalho R.R., Djorgovski S.G., Noterdaeme P., Castro S., Poppe P.C.R., Aghaee A. <Astron. Astrophys., 508, 133-140 (2009)> =2009A&A...508..133G
ADC_Keywords: QSOs ; Redshifts ; Spectroscopy Keywords: Galaxy: evolution - Galaxy: formation - quasars: absorption lines - intergalactic medium - cosmology: observations Abstract: We present the results of a survey of damped (DLA, logN(HI)>20.3) and sub-damped Lyman-α systems (19.5<logN(HI)<20.3) at z>2.55 along the lines-of-sight to 77 quasars with emission redshifts in the range 4<zem<6.3. Intermediate resolution (R∼4300) spectra were obtained with the Echellette Spectrograph and Imager (ESI) mounted on the Keck telescope. A total of 100 systems with logN(HI)>19.5 were detected of which 40 systems are damped Lyman-α systems for an absorption length of ΔX= 378. About half of the lines of sight of this homogeneous survey have never been investigated for DLAs. Description: Medium resolution (R∼4300) spectra of all z>3 quasars discovered in the course of the DPOSS survey (Digital Palomar Observatory Sky Survey; see, e.g., Kennefick et al. 1995AJ....110.2553K; Djorgovski et al. 1999, ASP Conf. Ser., 191, 179 , and the complete listing of QSOs available at http://www.astro.caltech.edu/ george/z4.qsos) were obtained with the Echellette Spectrograph and Imager (ESI) mounted on the KECK II 10m telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 92 99 Summary of observations table2.dat 96 100 List of DLA-subDLAs
See also: J/MNRAS/346/1103 : Redshifts of damped Lymanα absorbers (Peroux+, 2003) J/ApJ/635/123 : The SDSS-DR3 damped Lyα survey (Prochaska+, 2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- QSO QSO name 16- 20 F5.3 --- zem Emission redshift 22- 26 F5.2 mag Rmag R magnitude 28- 29 I2 h RAh Right ascension (J2000) 31- 32 I2 min RAm Right ascension (J2000) 34- 37 F4.1 s RAs Right ascension (J2000) 39 A1 --- DE- Declination sign (J2000) 40- 41 I2 deg DEd Declination (J2000) 43- 44 I2 arcmin DEm Declination (J2000) 46- 49 F4.1 arcsec DEs Declination (J2000) 51- 60 A10 "YYYY/MM/DD" Obs.Date Observation date 61 A1 --- --- [,] 62- 63 I2 d DD2 ? Second day of observation for Obs.Date 64 A1 --- --- [,] 65- 66 I2 d DD3 ? Third day of observation for Obs.Date 68- 77 A10 "YYYY/MM/DD" Obs.Date2 Second Observation date 78 A1 --- --- [,] 79- 80 I2 d DD4 ? Second day of observation for Obs.Date2 82- 84 I3 min t.exp Exposure time 86- 92 A7 -- Note Previous usage (G1)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- QSO QSO name 15- 19 F5.3 --- zem Emission redshift 21- 25 F5.3 --- zemmin Minimium value of emission redshift 27- 31 F5.3 --- zemmax Maximum value of emission redshift 33- 37 F5.3 --- zabs DLA-subDLA absorption redshift 39- 43 F5.2 [cm-2] logN(HI) HI column density 45- 48 F4.2 [cm-2] e_logN(HI) rms uncertainty on logN(HI) 50- 85 A36 --- Lines Metal Lines 86- 88 A3 --- r_Lines detection of the metal lines (1) 90- 96 A7 --- Note Previous usage (G1)
Note (1): Notes on metal lines as follows: a = Metals were detected by Peroux et al. (2005MNRAS.363..479P) b = Metals were detected by Prochaska & Wolfe (2009ApJ...696.1543P) c = We do not cover the red part of the spectrum λ≥6400Å d = Metals were detected by Peroux et al. (2001AJ....121.1799P) e = Metals were detected by Dessauges-Zavadsky et al. (2003MNRAS.345..447D)
Global notes: Note (G1): Quasars from this survey were previously used for ΩDLA, HI estimations as follows: 1 = Peroux et al. (2001AJ....121.1799P) 2 = Peroux et al. (2003, Cat. J/MNRAS/346/1103) 3 = Peroux et al. (2005MNRAS.363..479P) 4 = Prochaska et al. (2005, Cat. J/ApJ/635/123) 5 = Prochaska & Wolfe (2009ApJ...696.1543P)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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