J/AJ/141/182 Radio and optical properties of QSOs (Kimball+, 2011)
Correlations of quasar optical spectra with radio morphology.
Kimball A.E., Ivezic Z., Wiita P.J., Schneider D.P.
<Astron. J., 141, 182 (2011)>
=2011AJ....141..182K 2011AJ....141..182K
ADC_Keywords: QSOs ; Radio sources ; Photometry, SDSS; Morphology
Keywords: quasars: emission lines; quasars: general
Abstract:
Using the largest homogeneous quasar sample with high-quality optical
spectra and robust radio morphology classifications assembled to date,
we investigate relationships between radio and optical properties with
unprecedented statistical power. The sample consists of 4714 radio
quasars from FIRST with S20≥2mJy and with spectra from the Sloan
Digital Sky Survey (SDSS). Radio morphology classes include core-only
(core), core-lobe (lobe), core-jet (jet), lobe-core-lobe (triple), and
double-lobe.
Description:
The radio survey, FIRST, is the deepest large-area radio sky survey
undertaken to date. Performed at 20cm, it is sensitive to the
high-frequency quasar core emission; the survey contains
high-resolution radio images. The SDSS provides the largest ever
homogeneous sample of spectroscopically confirmed quasars. FIRST was
designed to cover the same region of sky as SDSS, making this
combination of sky surveys a powerful tool for statistical studies of
radio quasars.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 79 4714 Quasar sample with radio morphology classifications
table3.dat 77 634 317 candidate double-lobed quasars without a
detected radio core
table9.dat 58 719 The 719 optically-faint triples in the SDSS
table5.dat 101 9478 Median composite quasar spectra for radio
morphology classes
table6.dat 64 9478 Median composite quasar spectra for triple quasar
log(R) subclasses (ratio core/lobe)
table7.dat 63 9478 Median composite quasar spectra for quasar
log(RI) subclasses (ratio radio/I-band)
--------------------------------------------------------------------------------
See also:
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS name
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 A1 --- Cl Morphology Classification (1)
51- 52 A2 --- sCl Morphology Subclassification (2)
54 A1 --- Flag Source flag (3)
56- 63 F8.2 mJy Score The 20cm core flux density
65- 72 F8.3 mJy Slobe1 ? The 20cm flux density of lobe 1 (4)
74- 79 F6.2 mJy Slobe2 ? The 20cm flux density of lobe 2 (4)
--------------------------------------------------------------------------------
Note (1): See Section 3.2. Classification as follows:
C = core
J = jet
K = knotty
L = lobe
T = triple
X = unclassified
Note (2): Subclassification as follows:
U = unresolved core sources
R = resolved core sources
C = core-dominated triple or lobe sources
L = lobe-dominated triple or lobe sources
I = irregular triple sources
X = undetermined subclass for triples/lobes
= source class has no subclass
Note (3): Source flag as follows:
1 = source with recognizable morphology, such that the two
first-round viewers initially agreed on the category
2 = more difficult case, where a third viewer's opinion was necessary
as a tie-breaker
3 = source with undetermined morphology
Note (4): Sources with undetermined lobe components (due to crowded FIRST
images) are given a default value of -99.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS name (1)
20- 29 F10.6 deg RAdeg SDSS Right Ascension in decimal degrees (J2000)
31- 40 F10.6 deg DEdeg SDSS Declination in decimal degrees (J2000)
42- 47 F6.4 --- z Redshift
49- 57 F9.5 deg RA2deg FIRST Right Ascension in decimal degrees (J2000)
58 A1 --- --- [0]
60- 68 F9.5 deg DE2deg FIRST Declination in decimal degrees (J2000)
69 A1 --- --- [0]
71- 77 F7.2 mJy Score The 20cm core flux density
--------------------------------------------------------------------------------
Note (1): 2 possible FIRST counterparts for each SDSS.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.6 deg RAdeg SDSS Right Ascension in decimal degrees (J2000)
12- 21 F10.6 deg DEdeg SDSS Declination in decimal degrees (J2000)
23- 28 F6.2 mJy S1 FIRST 20cm flux density
30- 34 F5.2 mag umag SDSS u band magnitude
36- 40 F5.2 mag gmag SDSS g band magnitude
42- 46 F5.2 mag rmag SDSS r band magnitude
48- 52 F5.2 mag imag SDSS i band magnitude
54- 58 F5.2 mag zmag SDSS z band magnitude
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm lambda [900/8000] Wavelength; in Angstroms
9- 14 F6.3 --- RQ Radio-quiet fλ (G1)
16- 20 F5.3 --- e_RQ Uncertainty in RQ
22- 27 F6.3 --- AR All radio fλ (G1)
29- 33 F5.3 --- e_AR Uncertainty in AR
35- 40 F6.3 --- RC Resolved core fλ (G1)
42- 46 F5.3 --- e_RC Uncertainty in RC
48- 53 F6.3 --- UC Unresolved core fλ (G1)
55- 59 F5.3 --- e_UC Uncertainty in UC
61- 66 F6.3 --- Jet Jet fλ (G1)
68- 73 F6.3 --- e_Jet ?=-1 Uncertainty in Jet (G2)
75- 80 F6.3 --- Lobe Lobe fλ (G1)
82- 87 F6.3 --- e_Lobe ?=-1 Uncertainty in Lobe (G2)
89- 94 F6.3 --- Trip Triple fλ (G1)
96-101 F6.3 --- e_Trip ?=-1 Uncertainty in Trip (G2)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm lambda [900/8000] Wavelength; in Angstroms
9- 14 F6.3 --- SR1 Class log(R)←1.5 fλ (quasars with
lines of sight close to radio-jet axis) (G1)
16- 21 F6.3 --- e_SR1 ?=-1 Uncertainty in S1 (G2)
22 A1 --- n_SR1 [a] a when only one input spectrum contributes
to that wavelength bin
23- 28 F6.3 --- SR2 Class -1.5<log(R)←0.5 fλ (G1)
30- 35 F6.3 --- e_SR2 ?=-1 Uncertainty in S2 (G2)
36 A1 --- n_SR2 [a] a when only one input spectrum contributes
to that wavelength bin
37- 42 F6.3 --- SR3 Class -0.5<log(R)<0.5 fλ (G1)
44- 49 F6.3 --- e_SR3 ?=-1 Uncertainty in S3 (G2)
50 A1 --- n_SR3 [a] a when only one input spectrum contributes
to that wavelength bin
51- 56 F6.3 --- SR4 Class 0.5<log(R) fλ (quasars viewed
closest to the plane of accretion) (G1)
58- 63 F6.3 --- e_SR4 ?=-1 Uncertainty in S4 (G2)
64 A1 --- n_SR4 [a] a when only one input spectrum contributes
to that wavelength bin
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm lambda [900/8000] Wavelength; in Angstroms
9- 14 F6.3 --- SI1 Class log(RI)<1.5 fλ (G1)
16- 20 F5.3 --- e_SI1 ?=-1 Uncertainty in S1 (G2)
22- 27 F6.3 --- SI2 Class 1.5<log(RI)<2.0 fλ (G1)
29- 34 F6.3 --- e_SI2 ?=-1 Uncertainty in S2 (G2)
35 A1 --- n_SI2 [a] a when only one input spectrum contributes
to that wavelength bin
36- 41 F6.3 --- SI3 Class 2.0<log(RI)<2.5 fλ (G1)
43- 48 F6.3 --- e_SI3 ?=-1 Uncertainty in S3 (G2)
49 A1 --- n_SI3 [a] a when only one input spectrum contributes
to that wavelength bin
50- 55 F6.3 --- SI4 Class 2.5<log(RI) fλ (G1)
57- 62 F6.3 --- e_SI4 ?=-1 Uncertainty in S4 (G2)
63 A1 --- n_SI4 [a] a when only one input spectrum contributes
to that wavelength bin
--------------------------------------------------------------------------------
Global Notes:
Note (G1): Values of fλ (flux) are in arbitrary units, such that
they are on the same flux scale as the Vanden Berk et al.
(2001AJ....122..549V 2001AJ....122..549V) spectrum (see Section 5.1 for details).
The classes are defined by:
* SRx classes (table6): the ratio R=(Score/Slobe)(1+z)0.8
(assuming spectral indices of αcore=0 and αlobe=-0.8)
* SIx classes (table7): the ratio RI=Lradio/Loptical
Note (G2): A value of -1 indicates that only one input spectrum contributes
to that wavelength bin, while 0 indicates that no input spectra
contribute at that wavelength.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Sep-2012