J/A+A/505/1087 DLAs in SDSS-DR7 (Noterdaeme+, 2009)
Evolution of the cosmological mass density of neutral gas from
Sloan Digital Sky Survey. II - Data Release 7.
Noterdaeme, P., Petitjean P., Ledoux C., Srianand R.
<Astron. Astrophys. 505, 1087 (2009)>
=2009A&A...505.1087N 2009A&A...505.1087N
ADC_Keywords: QSOs ; Spectroscopy ; H I data; Redshifts ; Equivalent widths
Keywords: cosmology: observations - quasar: absorption lines
Abstract:
We present a study of the evolution of the cosmological mass density
of neutral gas using a fully automatic search for Damped Lyman-alpha
systems in the Sloan Digital Sky Survey II Data Release 7.
Description:
Our sample of high redshift Damped Lyman-alpha systems (DLAs) and
sub-DLAs is presented along with associated metal equivalent widths
and/or upper-limits.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 199 1426 Damped and sub-damped Lyman alpha absorbers
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See also:
J/ApJ/543/552 : z>3 damped Lyα abs. systems (Storrie-Lombardi+, 2000)
J/other/PASA/19.455 : Damped Lyman alpha absorption of QSOs (Curran+, 2002)
J/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004)
J/MNRAS/346/1103 : Redshifts of damped Lymanα absorbers (Peroux+, 2003)
J/PASP/116/622 : SDSS damped Lyα survey: DR1 (Prochaska+, 2004)
J/ApJ/635/123 : The SDSS-DR3 damped Lyα survey (Prochaska+, 2005)
J/ApJ/636/610 : Damped Lyα systems at z<1.65 (Rao+, 2006)
J/PASP/118/1077 : Metal-strong damped Lyα systems (Herbert-Fort+, 2006)
J/A+A/473/791 : CIV absorption in DLAs and sub-DLAs systems (Fox+, 2007)
J/ApJ/661/88 : Zn measurements in sub-DLAs and DLAs QSOs (Kulkarni+, 2007)
J/ApJS/171/29 : UCSD/Keck DLA Abundance Database (Prochaska+, 2009)
J/MNRAS/392/998 : Damped Lymanα systems (Ellison+, 2009)
J/A+A/478/701 : SDSS quasars with DLA systems color excess (Vladilo+, 2008)
http://sdss.org/ : SDSS Home Page
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- QSO QSO name (J2000)
22- 25 I04 --- Plate SDSS spectroscopic plate
27- 31 I5 --- MJD SDSS Modified Julian Date
33- 35 I03 --- Fiber SDSS spectroscopic fiber
37- 40 F4.2 --- zem QSO emission redshift
42- 46 F5.3 --- zabs DLA absorption redshift
48 I1 --- Flag [0/2] Lines used for absorption redshift (1)
50- 54 F5.2 [cm-2] logN(HI) HI column density
56- 59 F4.2 [cm-2] e_logN(HI) Error on HI column density
61- 64 F4.2 0.1nm WCII1334 ? Rest equivalent width of CII 1334
66- 69 F4.2 0.1nm e_WCII1334 ? Error on WCII1334 or upper-limit (2)
71- 74 F4.2 0.1nm WNiII1370 ? Rest equivalent width of NiII 1370
76- 79 F4.2 0.1nm e_WNiII1370 ? Error on WNiII1370 or upper-limit (2)
81- 84 F4.2 0.1nm WSiII1526 ? Rest equivalent width of SiII 1526
86- 89 F4.2 0.1nm e_WSiII1526 ? Error on WSiII1526 or upper-limit (2)
91- 94 F4.2 0.1nm WFeII1608 ? Rest equivalent width of FeII 1608
96- 99 F4.2 0.1nm e_WFeII1608 ? Error on WFeII1608 or upper-limit (2)
101-104 F4.2 0.1nm WAlII1670 ? Rest equivalent width of AlII 1670
106-109 F4.2 0.1nm e_WAlII1670 ? Error on WAlII1670 or upper-limit (2)
111-114 F4.2 0.1nm WSiII1808 ? Rest equivalent width of SiII 1808
116-119 F4.2 0.1nm e_WSiII1808 ? Error on WSiII1808 or upper-limit (2)
121-124 F4.2 0.1nm WZnII2026 ? Rest equivalent width of ZnII 2026 (3)
126-129 F4.2 0.1nm e_WZnII2026 ? Error on WZnII2026 or upper-limit (2)(3)
131-134 F4.2 0.1nm WFeII2344 ? Rest equivalent width of FeII 2344
136-139 F4.2 0.1nm e_WFeII2344 ? Error on FeII2344 or upper-limit (2)
141-144 F4.2 0.1nm WFeII2374 ? Rest equivalent width of FeII 2374
146-149 F4.2 0.1nm e_WFeII2374 ? Error on FeII2374 or upper-limit (2)
151-154 F4.2 0.1nm WFeII2382 ? Rest equivalent width of FeII 2382
156-159 F4.2 0.1nm e_WFeII2382 ? Error on FeII2382 or upper-limit (2)
161-164 F4.2 0.1nm WFeII2586 ? Rest equivalent width of FeII 2586
166-169 F4.2 0.1nm e_WFeII2586 ? Error on FeII2586 or upper-limit (2)
171-174 F4.2 0.1nm WFeII2600 ? Rest equivalent width of FeII 2600
176-179 F4.2 0.1nm e_WFeII2600 ? Error on FeII2600 or upper-limit (2)
181-184 F4.2 0.1nm WMgII2796 ? Rest equivalent width of MgII 2796
186-189 F4.2 0.1nm e_WMgII2796 ? Error on MgII2796 or upper-limit (2)
191-194 F4.2 0.1nm WMgII2803 ? Rest equivalent width of MgII 2803
196-199 F4.2 0.1nm e_WMgII2803 ? Error on MgII2803 or upper-limit (2)
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Note (1): Flag for absorption redshift as follows:
0 = zabs from Ly-alpha
1 = zabs from CIV/SiIV
2 = zabs from low-ionisation metal lines.
Note (2): 1σ error on the equivalent width in preceeding column, or,
if no measurement of equivalent width (empty preceeding column), 1
σ upper-limit on the equivalent width
Note (3): ZnII2026 is actually blended with MgI2026, hence the equivalent
width quoted refers to the sum of equivalent widths.
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Acknowledgements:
Pasquier Noterdaeme, noterdaeme(at)iap.fr
History:
* 16-Oct-2009: Original version
* 16-Jul-2010: Table3 corrected (new version from author)
(End) Pasquier Noterdaeme [IUCAA, India], Patricia Vannier [CDS] 12-Aug-2009