J/A+A/476/759 X-ray properties of AGN from the CJF sample (Britzen+, 2007)
The soft X-ray properties of AGN from the CJF sample. A correlation analysis
between soft X-ray and VLBI properties.
Britzen S., Brinkmann W., Campbell R.M., Gliozzi M., Readhead A.C.S.,
Browne I.W.A., Wilkinson P.
<Astron. Astrophys., 476, 759-777 (2007)>
=2007A&A...476..759B 2007A&A...476..759B
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: instrumentation: interferometers - galaxies: active -
X-rays: galaxies - radio continuum: galaxies
Abstract:
We present the soft X-ray properties obtained in the ROSAT All-Sky
survey and from pointed PSPC observations for the AGN in the complete
flux-density limited Caltech-Jodrell Bank flat spectrum sample
(hereafter CJF). CJF is a VLBI survey (VLBA observations at 5GHz) of
293 AGN with detailed information on jet component motion.
We investigate and discuss the soft X-ray properties of this AGN
sample and examine the correlations between X-ray and VLBI properties,
test beaming scenarios, and search for the discriminating properties
between the sub-samples detected and not detected by ROSAT.
Comparing the observed and the predicted X-ray fluxes by assuming an
Inverse Compton (IC) origin for the observed X-rays, we compute the
beaming or Doppler factor, δIC, for the CJF sources and
compare it with the equipartition Doppler factor, δEQ. We
further contrast the Doppler factors with other beaming indicators
derived from the VLBI observations, such as the value of the expansion
velocity, and the observed and intrinsic brightness temperature. We
calculate two different core dominance parameters (R): the ratio of
total VLBI flux to single-dish flux, RV, and the ratio of the VLBI
core-component flux to single-dish flux, RC. In addition, we
investigate the large-scale radio structure of the AGN and the
difference between the pc- and kpc-scale structure (misalignment) with
regard to the X-ray observations.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 172 293 CJF sources in the ROSAT All Sky Survey
refs.dat 67 32 References
table3.dat 123 61 Calculated values for sources not detected by ROSAT
table4.dat 123 89 Calculated values for sources detected by ROSAT
table5.dat 90 41 Calculated values for sources not detected by ROSAT
and not shown in the plots of this paper
table6.dat 90 63 Calculated values for sources detected by ROSAT
and not shown in the plots of this paper
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See also:
VIII/60 : Interferometer phase calibration sources (Patnaik+ 1998)
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
VII/248 : Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)
J/ApJS/95/345 : Second Caltech-Jodrell Bank VLBI Survey. I. (Taylor+ 1994)
J/ApJ/589/733 : VLBI polarimetry of CJF sources (Pollack+, 2003)
J/A+A/472/763 : Multi-epoch VLBI survey of CJF sources (Britzen+, 2007)
J/A+A/474/1093 : 30GHz flux densities of CJF sources (Lowe+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- CJF CJF name (HHMM+DDd) (G1)
10- 47 A38 --- ONames Other names (1)
49- 58 A10 --- Type Type (2)
59 A1 --- n_Type [nr*] Note on Type (3)
61 A1 --- l_z Limit flag on z
62- 68 F7.5 --- z ? Redshift
69 A1 --- u_z [?] Uncertainty flag on z
70- 71 A2 --- f_z [,t ]
73 A1 --- n_z [r] Note on z (3)
75- 79 F5.2 mag Vmag ? V magnitude
80 A1 --- u_Vmag [?] Uncertainty flag on Vmag
81 A1 --- n_Vmag [r] Note on Vmag (3)
83- 87 I5 mJy S5GHz 5GHz Green Bank flux
88 A1 --- l_EXML Limit flag on EXML
89- 94 F6.2 --- EXML Likelihood of the existence of an X-ray
source at the radio position in the RASS
96-101 F6.2 fW/m2 FX X-ray flux in the 0.1-2.4keV band
103-106 F4.2 fW/m2 e_FX ? rms uncertainty on FX
108-109 A2 --- Obs [p s] Pointed or Survey observation (4)
111-122 A12 --- VLA VLA structure (5)
123-129 A7 --- r_VLA Reference(s) for VLA, in refs.dat file
131 I1 --- Jet [0/5]? Value describing jet structure on
large (VLA) scales (6)
132 A1 --- u_Jet [?] Uncertainty flag on Jet
134 A1 --- l_PA(VLA) [~] Limit flag on PA(VLA)
135-137 I3 deg PA(VLA) ?=- Position angle of the VLA jet
138 A1 --- --- [/-,]
139 A1 --- l_PA(VLA)2 [~] Limit flag on PA(VLA)2
140-142 I3 deg PA(VLA)2 ?=- Second value of position angle of
the VLA jet
143 A1 --- --- [,/)]
144-146 I3 deg PA(VLA)3 ?=- Third value of Position angle of
the VLA jet
148 A1 --- n_PA(VLA) [1?+] Note pn PA(VLA)
150 A1 --- l_PA(VLBI) [~] Limit flag on PA(VLBI)
151-153 I3 deg PA(VLBI) ?=- Position angle of the VLBI jet
154 A1 --- --- [/-]
155 A1 --- l_PA(VLBI)2 [~] Limit flag on PA(VLBI)2
156-158 I3 deg PA(VLBI)2 ?=- Second value of Position angle of
the VLBI jet
160-162 I3 deg DPA ?=- Difference between the two position
angles
163 A1 --- --- [/-]
164-166 I3 deg DPA2 ? Second value of difference between the
two position angles
168-172 A5 --- n_DPA2 Note on DPA2
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Note (1): Common name of the object, if available, and the JVAS J2000 name
(Wilkinson et al. 1998 & Browne 1998, Cat. VIII/60). In case the
source is not observed within JVAS, we used the Veron-Cetty & Veron
(2001, Cat. VII/224) edition of A Catalogue of Quasars and Active
Nuclei, or the CLASS source name (Myers et al., 2003, Cat. VIII/72)
Note (2): Type of objects as follows:
Q = quasar
B = BL Lac object
G = radio galaxy
HPQ = high polarized quasar
LPQ = low polarized quasar
CSO = compact symmetric object
Sy 1 = Seyfert galaxies type 1
Sy 2 = Seyfert galaxies type 2
pec = source with peculiar properties
cluster = source belonging to a cluster
GL = gravitational lens system
C.g.l. = candidate gravitational lens
Note (3): Note as follows:
r = priv. comm. R. Vermeulen
n = NED information
* = Kim et al. (1991ApJ...379...80K 1991ApJ...379...80K) and
Slee & Siegman (1983PASAu...5..114S 1983PASAu...5..114S)
Note (4): Observation as follows:
s = source found by the standard analysis of the ROSAT Survey data
p = source found in the field of a pointed PSPC or HRI observation
Note (5): VLA structure as follows:
? = unknown
/ = no VLA information found
U = unresolved component
R = slightly resolved component
J = jet-like extended component
cJ = complex jet-like extended component
D = double source
cD = complex double source
JCJ = jet- and counter-jet
cJCJ = complex jet- and counter-jet
H = halo emission
GL = gravitational lens system
C.g.l.: Candidate gravitational lens
Note (6): This is the complexity-factor (see Sect. 4.3.2 for a more
detailed description). Its maximum value is 5, describing the
most complex extended structure.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 44 A21 --- Aut Author's name
46- 67 A22 --- Com Comments
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- CJF CJF name (HHMM+DDd) (G1)
10- 15 F6.3 c beta Apparent speed, βapp
17- 21 F5.2 --- dIC(f) ? IC Doppler factor for alpha=-0.75
23- 27 F5.2 --- dICc(f) ? Continuous IC Doppler factor for
alpha=-0.75
29- 32 F4.2 --- dEQ(f) Equipartition argument for alpha=-0.75
34- 38 F5.2 [10-11K] logTB(f) ? Observed brightness temperature for
alpha=-0.75
40- 44 F5.2 [10-11K] logTBic(f) ? Intrinsic brightness temperature for
alpha=-0.75
46- 51 F6.2 --- gamma(f) ? Bulk Lorentz factor, γsl for
alpha=-0.75
53- 58 F6.2 --- phi(f) Angle to the line of sight for alpha=-0.75
60- 64 F5.2 --- dIC ? IC Doppler factor for observed alpha
66- 71 F6.2 --- dICc ? Continuous IC Doppler factor for observed
alpha
73- 76 F4.2 --- dEQ Equipartition argument for observed alpha
78- 82 F5.2 [10-11K] logTB ? Observed brightness temperature for
observed alpha
84- 88 F5.2 [10-11K] logTBic ? Intrinsic brightness temperature for
observed alpha
90- 95 F6.2 --- gamma ? Bulk Lorentz factor, γsl for
observed alpha
97-102 F6.2 --- phi Angle to the line of sight for observed alpha
104-107 I4 mJy FVLBI 5GHz integrated flux (from Paper I,
Britzen et al., Cat. J/A+A/472/763)
109-112 I4 mJy FBLVIc 5GHz VLBI flux (from Taylor et al.,
1996ApJS..107...37T 1996ApJS..107...37T)
114-118 F5.2 [-] logRC Core dominance RC (ratio of the VLBI
core-component flux to single-dish flux)
120-123 F4.2 --- RV Core dominance RV (ratio of total VLBI flux
to single-dish flux)
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Byte-by-byte Description of file: table[56].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- CJF CJF name (HHMM+DDd) (G1)
10- 14 F5.2 --- dIC(f) ? IC Doppler factor for alpha=-0.75
16- 20 F5.2 --- dICc(f) ? Continuous IC Doppler factor for
alpha=-0.75
22- 26 F5.2 --- dEQ(f) Equipartition argument for alpha=-0.75
28- 32 F5.2 [10-11K] logTB(f) ? Observed brightness temperature for
alpha=-0.75
34- 38 F5.2 [10-11K] logTBic(f) ? Intrinsic brightness temperature for
alpha=-0.75
40- 44 F5.2 --- dIC ? IC Doppler factor for observed alpha
46- 51 F6.2 --- dICc ? Continuous IC Doppler factor for observed
alpha
53- 56 F4.2 --- dEQ Equipartition argument for observed alpha
58- 62 F5.2 [10-11K] logTB ? Observed brightness temperature for
observed alpha
64- 68 F5.2 [10-11K] logTBic ? Intrinsic brightness temperature for
observed alpha
70- 73 I4 mJy FVLBI 5GHz integrated flux (from Paper I,
Britzen et al., Cat. J/A+A/472/763)
75- 79 I5 mJy FBLVIc 5GHz VLBI flux (from Taylor et al.,
1996ApJS..107...37T 1996ApJS..107...37T)
81- 85 F5.2 [-] logRC Core dominance RC (ratio of the VLBI
core-component flux to single-dish flux)
87- 90 F4.2 --- RV Core dominance RV (ratio of total VLBI flux
to single-dish flux)
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Global notes:
Note (G1): Objects identified as CJF BHHMM+DDd in Simbad
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History:
From electronic version of the journal
References:
Britzen et al., Paper I 2007A&A...472..763B 2007A&A...472..763B, Cat. J/A+A/472/763
Britzen et al., Paper II 2007, A&A submitted
(End) Patricia Vannier [CDS] 28-Jan-2008