J/ApJ/639/766 SDSS-DR3 strong MgII absorbers (Prochter+, 2006)
On the incidence and kinematics of strong Mg II absorbers.
Prochter G.E., Prochaska J.X., Burles S.M.
<Astrophys. J., 639, 766-780 (2006)>
=2006ApJ...639..766P 2006ApJ...639..766P
ADC_Keywords: QSOs ; Equivalent widths ; Redshifts
Keywords: quasars: absorption lines (Mg II)
Abstract:
We present the results of two complementary investigations into the
nature of strong (rest equivalent width, Wr>1.0Å) MgII absorption
systems at high redshift. The first line of questioning examines the
complete Sloan Digital Sky Survey Data Release 3 set of quasar spectra
to determine the evolution of the incidence of strong MgII absorption.
This search resulted in 7421 confirmed MgII systems of Wr>1.0Å,
yielding a >95% complete statistical sample of 4835 absorbers (systems
detected in S/N>7 spectral regions) spanning a redshift range
0.35<z<2.3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 63 7421 SDSS-DR3 Wr(2796)>1.0Å MgII systems
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See also:
http://www.sdss.org : SDSS Home Page
J/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- SDSS Quasar SDSS identification (JHHMMSS.ss+DDMMSS.ss)
22- 23 I2 h RAh Hour of Right Ascension (J2000)
25- 26 I2 min RAm Minute of Right Ascension (J2000)
28- 32 F5.2 s RAs Second of Right Ascension (J2000)
34 A1 --- DE- Sign of the Declination (J2000)
35- 36 I2 deg DEd Degree of Declination (J2000)
38- 39 I2 arcmin DEm Arcminute of Declination (J2000)
41- 45 F5.2 arcsec DEs Arcsecond of Declination (J2000)
47- 51 F5.3 --- zQSO Emission redshift
53- 57 F5.3 --- zMgII The MgII redshift
59- 63 F5.2 0.1nm EWr The MgII rest equivalent width in Angstroms
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 21-Mar-2007