J/ApJS/165/1 BAL QSOs from SDSS DR3 (Trump+, 2006)
A catalog of broad absorption line quasars from the Sloan Digital Sky Survey
third data release.
Trump J.R., Hall P.B., Reichard T.A., Richards G.T., Schneider D.P.,
Vanden Berk D.E., Knapp G.R., Anderson S.F., Fan X., Brinkman J.,
Kleinman S.J., Nitta A.
<Astrophys. J. Suppl. Ser., 165, 1-18 (2006)>
=2006ApJS..165....1T 2006ApJS..165....1T
ADC_Keywords: QSOs ; Redshifts
Keywords: catalogs - galaxies: active - quasars: absorption lines -
quasars: emission lines - quasars: general
Abstract:
We present a total of 4784 unique broad absorption line quasars from
the Sloan Digital Sky Survey Third Data Release (Cat. VII/243). An
automated algorithm was used to match a continuum to each quasar and
to identify regions of flux at least 10% below the continuum over a
velocity range of at least 1000km/s in the CIV and MgII absorption
regions. The model continuum was selected as the best-fit match from a
set of template quasar spectra binned in luminosity, emission line
width, and redshift, with the power-law spectral index and amount of
dust reddening as additional free parameters. We characterize our
sample through the traditional balnicity index and a revised
absorption index, as well as through parameters such as the width,
outflow velocity, fractional depth, and number of troughs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 161 4843 SDSS DR3 BALQSO catalog
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See also:
VII/243 : SDSS quasar catalog. III. (Schneider+, 2005)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS DR3 Designation, HHMMSS.ss+DDMMSS.s, J2000
20- 23 I4 --- Plate Spectroscopic plate number
26- 30 I5 d ObsDate MJD of spectroscopic observation
33- 35 I3 --- Fiber Spectroscopic fiber number
38- 42 F5.3 --- z Redshift
45- 49 F5.2 mag imag SDSS PSF i magnitude (1)
52- 57 F6.2 mag iMAG Absolute i magnitude
60- 63 A4 --- sType Classification Subtype (2)
66- 71 I6 km/s AI Absorption index (3)
73- 78 F6.2 km/s e_AI Error in AI
81- 86 I6 km/s BI Balnicity index (4)
88- 93 F6.2 km/s e_BI Error in BI
97 I1 --- Ntemp Best-fit template number (5)
99-104 F6.2 --- Sp+Index Spectral index used by best-fitted template
107-112 F6.3 --- E(B-V) Reddening used by best-fitted template
114-120 F7.2 --- chi2 The χ20 value of the best fit
123-124 I2 --- Ntr Number of distinct BAL troughs
130-134 I5 km/s Wtr Widest BAL trough
138-142 F5.3 --- Dtr Deepest part of any BAL trough
144-149 I6 km/s <Vel> Weighted average velocity of BAL troughs
151-156 I6 km/s Vmax Maximum velocity of BAL troughs from the
emission line
158-161 F4.1 --- S/N SDSS spectrum S/N ratio in the i-band
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Note (1): Not corrected for Galactic extinction.
Note (2): Subtypes as follows:
n = relatively narrow trough
LoF = FeLoBAL with MgII absorption in its SDSS spectra
HLF = FeLoBAL with CIV absorption in its SDSS spectra
Lo = LoBAL detected through MgII absorption
HL = HiBAL in which broad (≥1000km/s) low-ionization absorption is
also seen
Hi = HiBAL-only object, in which broad low-ionization absorption is
not seen even though MgII is within the spectral coverage
H = HiBAL in which the MgII region is not within the spectral
coverage or has a very low signal-to-noise ratio and so whether
or not the object is a LoBAL as well as a HiBAL is unknown
Note (3): The absorption index is a true equivalent width, measuring all
absorption within the limits of every trough, and so that the
integration limit extends to 29000km/s.
Note (4): The Balnicity index is a modified velocity equivalent width of
the CIV BAL. It is a sum of the modified equivalent width of the
portions of all contiguous BAL troughs between 3000 and 25000km/s
shortward of 1549Å.
Note (5): Template numbers 0-3 correspond to the less luminous bin and
numbers 4-7 to the more luminous bin; line width increases from 0 to 3
and from 4 to 7.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 14-Dec-2007