J/ApJS/210/7 BOSS narrow CIV absorption lines. I. zem≤2.4 (Chen+, 2014)
Catalog of narrow CIV absorption lines in BOSS.
I. Quasars with zem ≤ 2.4.
Chen Z.-F., Qin Y.-P., Pan C.-J., Huang W.-R., Qin M., Wu H.-N.
<Astrophys. J. Suppl. Ser., 210, 7 (2014)>
=2014ApJS..210....7C 2014ApJS..210....7C
ADC_Keywords: Redshifts ; Equivalent widths ; QSOs ; Surveys
Keywords: line: identification; quasars: absorption lines; quasars: general
Abstract:
We have assembled absorption systems by visually identifying CIV
λλ1548, 1551 absorption doublets in the quasar spectra
of the Baryon Oscillation Spectroscopic Survey (BOSS) one by one. This
paper is the first of the series of work. In this paper, we focus on
quasars with relatively low redshifts and high signal-to-noise ratio
spectra, and hence we limit our analysis to quasars with zem≤2.4
and to doublets with Wrλ1548≥0.2Å. Out of the more than
87000 quasars in Data Release 9, we limit our search to 10121 quasars
that have the appropriate redshifts and spectra with high enough
signal-to-noise ratios to identify narrow CIV absorption lines. Among
them, 5442 quasars are detected to have at least one CIV
λλ1548, 1551 absorption doublet. We obtain a catalog
containing 8368 CIV λλ1548, 1551 absorption systems,
whose redshifts are within zabs=1.4544-2.2805. In this catalog,
about 33.7% absorbers have 0.2Å≤Wrλ1548<0.5Å, about
45.9% absorbers have 0.5Å≤Wrλ1548<1.0Å, about 19.2%
absorbers have 1.0Å≤Wrλ1548<2.0Å, and about 1.2%
absorbers have Wrλ1548≥2.0Å.
Description:
We identify absorption doublets, such as CIVλλ1548,1551
in the quasar spectra of the Baryon Oscillation Spectroscopic Survey
(BOSS), which is a part of the SDSS-III (Eisenstein et al.
2011AJ....142...72E 2011AJ....142...72E).
BOSS aims to obtain over 150000 quasar spectra with zem>2.15 using
the same 2.5m telescope as the SDSS did. The spectra of BOSS span a
wavelength range of 3600-10400Å at a resolution of 1300<R<3000. The
first data release of BOSS, SDSS Data Release Nine (SDSS DR9),
contains 87822 quasars detected over an area of 3275deg2 (Paris et
al. 2012, Cat. VII/269).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 9417 Catalog of CIV(1548,1551) absorption systems
for 6291 SDSS-DR9 quasars - table from
erratum 2014, ApJS, 212, 17
table3.dat 45 100 *Sources of the randomly selected quasar sample
table4.dat 90 15 CIV(1548,1551) absorption systems of the
randomly selected quasar sample
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Note on table3.dat: To have a look at possibly missed doublets, we randomly
select 100 quasars from those located in the left lower region of Figure 2
(below the horizontal red line and on the left-hand side of the vertical red
line), to detect CIV1548,1551 absorption doublets with the same criteria
described in Section 2. These quasars are listed in this table 3.
15 CIV(1548,1551) absorption doublets are detected from these quasar spectra,
which are presented in Table 4.
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See also:
VII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)
J/MNRAS/434/163 : QSOs narrow absorption line variability (Hacker+, 2013)
J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)
J/A+A/547/L1 : SDSS-III DR9 DLA catalogue (Noterdaeme+, 2012)
J/MNRAS/418/1055 : BOSS morphology of galaxies (Masters+, 2011)
J/A+A/473/791 : CIV absorption in DLAs and sub-DLAs systems (Fox+, 2007)
J/A+A/283/759 : CIV QSO absorption systems (Petitjean+ 1994)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table[14].dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS identifier (HHMMSS.ss+DDMMSS.s; J2000)
20- 23 I4 --- Plate SDSS plate identifier
25- 29 I5 d MJD Modified Julian Date of the observation
31- 34 I4 --- Fiber SDSS fiber identifier
36- 41 F6.4 --- zem [1.5/2.4] Redshift derived from emission lines
43- 48 F6.4 --- zabs [1.4/2.3] Redshift derived from absorption lines
50- 53 F4.2 0.1nm W1548 [0.2/3.2] Rest equivalent width of 1548 CIV line
55- 59 F5.2 --- s1548 Significant detection level of W1548 (1)
61- 64 F4.2 0.1nm W1551 [0.2/3] Rest equivalent width of 1551 CIV line
66- 70 F5.2 --- s1551 Significant detection level of W1551 (1)
72- 76 F5.2 --- SNR1548 [1.9/49] Signal-to-Noise Ratio of 1548 CIV line
78- 82 F5.2 --- SNR1551 [1.9/44] Signal-to-Noise Ratio of 1551 CIV line
84- 90 F7.5 --- beta [0.03/0.2] Relative velocity β (2)
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Note (1): Where s1548|1551=W1548|1551/σ(W1548|1551).
Note (2): Where β=[(1+zem)2-(1+zabs)2]/[(1+zem)2+(1+zabs)2].
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS identifier (HHMMSS.ss+DDMMSS.s; J2000)
20- 23 I4 --- Plate SDSS plate identifier
25- 29 I5 d MJD Modified Julian Date of the observation
31- 34 I4 --- Fiber SDSS fiber identifier
36- 41 F6.4 --- zem [1.7/2.4] Redshift derived from emission lines
43- 45 F3.1 --- SNR [1/4] Median Signal-to-Noise Ratio (1)
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Note (1): In the surveyed spectral region.
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History:
* 28-Jan-2014: From electronic version of the journal
* 26-Feb-2014: Insert into VizieR
* 14-Jan-2015: Table 1 switched for the one corrected in erratum from
2014, ApJS, 212, 17.
* 10-Feb-2016: SDSS J00063.085+031327.1 corrected by J000603.08+031327.1
in table 3 and 10 other identifiers corrected in table 1.
References:
Chen et al. Paper II. 2014ApJS..215...12C 2014ApJS..215...12C Cat. J/ApJS/215/12
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 28-Jan-2014