J/ApJ/660/1093 Weak MgII absorbers at 0.4<z<2.4 (Narayanan+, 2007)
A survey of weak Mg II absorbers at 0.4 < z < 2.4.
Narayanan A., Misawa T., Charlton J.C., Kim T.-S.
<Astrophys. J., 660, 1093-1105 (2007)>
=2007ApJ...660.1093N 2007ApJ...660.1093N
ADC_Keywords: QSOs ; Equivalent widths
Keywords: galaxies: evolution - intergalactic medium - quasars: absorption lines
Abstract:
We present results from a survey of weak MgII absorbers in the
VLT/UVES spectra of 81 QSOs obtained from the ESO archive. In this
survey, we identified 112 weak MgII systems within the redshift
interval 0.4<z<2.4 with 86% completeness down to a rest-frame
equivalent width of Wr(2796)=0.02Å, overing a cumulative redshift
path length of {DELTA}Z∼77.3.
Description:
Our sample of 81 quasar spectra used for the survey was retrieved from
the ESO archive.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 143 UVES/VLT archive QSO data set
table2.dat 60 116 Weak MgII systems detected
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See also:
J/AJ/106/848R : QSO MgII absorption line systems (Drinkwater+, 1993)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- QSO Target name
12- 17 F6.4 --- z Quasar redshift
19- 23 F5.2 mag Vmag ? Quasar V magnitude
24 A1 --- n_Vmag [g] g when SDSS-g magnitude
27- 30 I4 0.1nm lam1 ? First value of wavelength coverage interval
31 A1 -- --- [-]
32- 36 I5 0.1nm lam2 ? Second value of wavelength coverage interval
38- 40 I3 --- Set1 ? Cross-disperser setting
41 A1 --- --- [x]
42- 44 I3 --- Set2 ? Cross-disperser setting
46- 50 I5 s Texp Exposure time
52- 63 A12 --- Prog Program ID
66- 83 A18 --- PI PI name of the program
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- QSO Quasar name
13- 20 F8.6 --- zabs Redshift of the absorber
22- 26 F5.3 0.1nm Wr(2796) Measured rest-frame equivalent width of
MgII λ2796Å
28- 32 F5.3 0.1nm e_Wr(2796) rms uncertainty on Wr(2796)
34- 38 F5.3 0.1nm Wr(2803) Measured rest-frame equivalent width of
MgII λ2803Å
40- 44 F5.3 0.1nm e_Wr(2803) rms uncertainty on Wr(2803)
46- 49 F4.2 --- DR Doublet ratio given by Wr(2796)/Wr(2803)
51- 54 F4.2 --- e_DR rms uncertainty on DR
56- 60 F5.2 --- Z(Wr,DR) ? Cumulative redshift path length (1)
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Note (1): The first four listed systems have z<0.4, and are therefore not
part of our survey.
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History:
* 30-Jun-2010: From electronic version of the journal
* 14-Aug-2010: names of quasars homogenized between tables 1 and 2
(End) Patricia Vannier [CDS] 30-Jun-2010