J/AJ/131/84 AGNs and host galaxies information (Vanden Berk+, 2006)
Spectral decomposition of broad-line AGNs and host galaxies.
Vanden Berk D.E., Shen J., Yip C.-W., Schneider D.P., Connolly A.J.,
Burton R.E., Jester S., Hall P.B., Szalay A.S., Brinkmann J.
<Astron. J., 131, 84-99 (2006)>
=2006AJ....131...84V 2006AJ....131...84V
ADC_Keywords: Active gal. nuclei ; QSOs ; Photometry, SDSS
Keywords: galaxies: active - quasars: general - surveys -
techniques: spectroscopic
Abstract:
Using an eigenspectrum decomposition technique, we separate the host
galaxy from the broad-line active galactic nucleus (AGN) in a set of
4666 spectra from the Sloan Digital Sky Survey (SDSS), from redshifts
near zero up to about 0.75. The decomposition technique uses separate
sets of galaxy and quasar eigenspectra to efficiently and reliably
separate the AGN and host spectroscopic components. The technique
accurately reproduces the host galaxy spectrum, its contributing
fraction, and its classification.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 285 11647 AGN and host galaxy information
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See also:
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
VII/243 : SDSS quasar catalog. III. (Schneider+, 2005)
J/AJ/122/503 : SDSS u*g*r*i*z* photometry and redshift of QSOs (Anderson+ 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSSJ Object Designation (1)
20- 29 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
31- 40 F10.6 deg DEdeg Declination in decimal degrees (J2000)
42- 47 F6.4 --- z Redshift
49- 52 I4 --- Plate Spectroscopic Plate Number
54- 56 I3 --- Fib Spectroscopic Fiber Number
58- 62 I5 d MJD Modified Julian Date of spectroscopic
observation
64 A1 --- r/u [ru] resolved/unresolved Morphology
65- 74 A10 --- --- [nresolved ]
76- 80 F5.2 --- S/Ni Average Spectroscopic (S/N)/pix in i band
82- 87 F6.3 mag gmag.p The g band Point Spread Function magnitude
89- 93 F5.3 mag e_gmag.p The error in gmagPSF
95-100 F6.3 mag rmag.p The r Point Spread Function magnitude
102-106 F5.3 mag e_rmag.p The error in rmagPSF
108-113 F6.3 mag imag.p The i Point Spread Function magnitude
115-119 F5.3 mag e_imag.p The error in imagPSF
121-126 F6.3 mag gmagSp The g band Spectroscopic magnitude
128-133 F6.3 mag rmagSp The r band Spectroscopic magnitude
135-140 F6.3 mag imagSp The i band Spectroscopic magnitude
142-147 F6.3 mag gmag The g band Cmodel magnitude
149-153 F5.3 mag e_gmag The error in gmagCmod
155-160 F6.3 mag rmag The r band Cmodel magnitude
162-166 F5.3 mag e_rmag The error in rmagCmod
168-173 F6.3 mag imag The i band Cmodel magnitude
175-179 F5.3 mag e_imag The error in imagCmod
181-186 F6.3 mag Ag The g band Galactic absorption
188-193 F6.3 mag Ar The r band Galactic absorption
195-200 F6.3 mag Ai The i band Galactic absorption
202-207 F6.2 mag gMAG ?=0 The g band AGN component absolute mag. (2)
209-214 F6.2 mag rMAG ?=0 The r band AGN component absolute mag. (2)
216-221 F6.2 mag gMAG.H ?=0 The g band Host Galaxy absolute mag. (2)
223-228 F6.2 mag rMAG.H ?=0 The r band Host Galaxy
absolute magnitude (2)
230-235 F6.2 mag gMAGc Correction applied g band AGN
absolute magnitude (2)
237-242 F6.2 mag rMAGc Correction applied r band AGN
absolute magnitude (2)
244-249 F6.2 mag gMAG.Hc ?=-99.00 Correction applied to g band Host
absolute magnitude (2)
251-256 F6.2 mag rMAG.Hc ?=-99.00 Correction applied to r band Host
absolute magnitude (2)
258-261 F4.2 --- Fl.H Flux fraction from 4160-4210 Angstroms
from Host Galaxy (2)
263-267 F5.1 deg phi AGN first classification angle (2) (3)
269-273 F5.1 deg theta AGN second classification angle (2) (3)
275-279 F5.1 deg phi.H Host Galaxy first classification angle (2) (3)
281-285 F5.1 deg theta.H Host Galaxy second classification angle (2) (3)
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Note (1): Where name is SDSSJ hhmmss.ss+ddmmss.s J2000; truncated coordinates.
Note (2): Default values, set to zeros, are given for entries with a
non-physical spectroscopic decomposition.
Note (3): Following Connolly et al. (1995AJ....110.1071C 1995AJ....110.1071C), we define
two angles, called classification angles, which are formed
from the first three galaxy eigencoefficients:
φ=tan-1(a2/a1)
θ=cos-1(a3)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Aug-2006