J/ApJ/635/123 The SDSS-DR3 damped Lyα survey (Prochaska+, 2005)
The SDSS damped Lyα survey: Data Release 3.
Prochaska J.X., Herbert-fort S., Wolfe A.M.
<Astrophys. J., 635, 123-142 (2005)>
=2005ApJ...635..123P 2005ApJ...635..123P
ADC_Keywords: QSOs ; Redshifts
Keywords: galaxies: evolution - intergalactic medium - quasars: absorption lines
Abstract:
We present the results from a damped Lyα survey of the Sloan
Digital Sky Survey, Data Release 3 (Cat. II/259). We have discovered
over 500 new damped Lyα systems at z>2.2, and the complete
statistical sample for z>1.6 has more than 600 damped Lyα
galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 126 6568 SDSS-DR3 quasar sample
table3.dat 70 525 SDSS-DR3 DLA statistical sample
table4.dat 70 170 SDSS-DR3 DLA non-statistical sample
table5.dat 70 229 *SDSS-DR3 Super-LLS Sample
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Note on table5.dat: Super-LLS are Lyman Limit Systems with central NHI
values less than 2x1020cm-2
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See also:
http://www.sdss.org : SDSS Home Page
J/PASP/116/622 : SDSS damped Lyα survey: DR1 (Prochaska+, 2004)
VII/243 : SDSS quasar catalog. III. (Schneider+, 2005)
II/259 : The SDSS Photometric Catalog Release 3 (Abazajian+ 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Plate Plate number
6- 10 I5 d MJD Modified Julian Date of observation
12- 14 I3 --- Fiber Fiber number
16- 34 A19 --- SDSS Quasar name
36- 40 F5.3 --- zem QSO emission redshift
42 I1 --- f_zem Flag describing intrisic absorption on z (1)
44- 48 F5.3 --- zstart ? Starting redshift for S/Nlim=4 (2)
50- 54 F5.3 --- zstart5 ? Starting redshift for S/Nlim=5 (2)
56- 60 F5.3 --- zend ? Ending redshift for S/Nlim=4 (2)
62-126 A65 --- zcand Candidate(s) absorption redshift(s) along
sightline
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Note (1): Flag describing intrisic absorption on z, defined as follows:
0 = No intrinsic absorption;
1 = Mild intrinsic absorption, included in analysis with restriction;
2 = Strong intrinsic absorption, excluded.
Note (2): We define the starting redshift as
zi=(λi/1215.67)-1+0.005,
and the ending redshift as zf=0.99zQSO-0.01. λi is the
minimum wavelength, where the median S/N in a 20pix interval exceeds
S/Nlim.
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Byte-by-byte Description of file: table3.dat table4.dat table5.dat
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Bytes Format Units Label Explanations
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1 A1 --- n_SDSS [*] when quasar does not exit is SDSS-DR3 (3)
2- 20 A19 --- SDSS Quasar name in DR3, as in table1 (3)
22- 39 A18 --- SDSSt Quasar truncated name (1)
41- 46 F6.4 --- zabs Damped Lyα absorption redshift (1)
48 I1 --- DR [1,3] Data release of actual spectrum analyzed
50 I1 --- S/N ? Signal-to-Noise ratio
52 A1 --- Memb [yn] Membership in the CLR (confidence limit
ratio) statistical cut?
54 I1 --- Metal [0/2] Flag on the metal-line absorption (2)
56- 60 F5.2 [cm-2] logNHI Log of the Hydrogen column density
62- 65 F4.2 [cm-2] E_logNHI Upper limit error in logNHI
67- 70 F4.2 [cm-2] e_logNHI Lower limit error in logNHI
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Note (1): [PHW2005] SDSS JHHMMSS.ss+DDMMSS.s abs N.NNNN in Simbad
Note (2): Flag on the metal-line absorption, defined as follows:
0 = No metals;
1 = Weak metals;
2 = Metals detected.
Note (3): column added at CDS. There are 2 SDSS names in table4 which
can't exist in SDSS-DR3: J103152.8+010923.0 and J161045.6+005728.1.
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History:
* 21-Aug-2006: From electronic version of the journal
* 23-Jan-2008: Corrected SDSS names from tables 3, 4, 5.
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 21-Aug-2006