J/other/RAA/13.259 γ-ray Doppler factor for Fermi blazars (Fan+, 2013)
The gamma-ray Doppler factor determinations for a Fermi blazar sample.
Fan J.-H., Yang J.-H., Liu Y., Zhang J.-Y.
<Res. Astron. Astrophys., 13, 259-269 (2013)>
=2013RAA....13..259F 2013RAA....13..259F
ADC_Keywords: Gamma rays ; X-ray sources ; BL Lac objects ; QSOs
Keywords: galaxies: active - galaxies: BL Lacertae objects - galaxies: quasars -
galaxies: jets
Abstract:
Observations suggest that gamma-ray loud blazars are strongly beamed.
The Fermi mission has detected many of blazars, which provide us with
a good opportunity to investigate the emission mechanism and the
beaming effect in the gamma-ray region. We compiled the X-ray
observations for 138 Fermi blazars (54 flat spectrum radio quasars, 36
low-peaked BL Lacertae objects, and 48 high-peaked BL Lacertae
objects) and calculated their Doppler factors, δ_γ. It is
interesting that the calculated Doppler factors, δ_γ, are
strongly correlated with the gamma-ray luminosity.
Description:
Based on the second catalog of Fermi gamma-ray LAT (2FGL) (Ackermann
et al. 2011, Cat. J/ApJ/743/171; Nolan et al., 2012, Cat.
J/ApJS/199/31), we compiled the available X-ray data from the
literature and listed them in Table 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 92 138 The γ-ray Doppler Factor for Fermi Blazars
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See also:
J/A+A/375/739 : Hard X-ray properties of blazars (Donato+, 2001)
J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)
J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [2FGL]
5- 16 A12 --- 2FGL Name of the source in 2FGL (JHHMM.m+DDMM)
18- 33 A16 --- OName Other name for the source
35 A1 --- Cl [HLF] Classification of source (1)
37- 41 F5.3 --- z Redshift
43- 50 E8.3 ph/cm2/s Fg γ-ray 1-100GeV photon flux (2)
52- 56 F5.3 --- a.g [1.3/3.0] Photon γ-ray spectral index (2)
58- 64 F7.4 uJy Fx X-ray flux density at 1keV
66- 70 F5.2 --- a.x [-0.4/2.4] X-ray spectral index
(FnuX∝νX-alpha)
72- 74 A3 --- Ref [D01 NED] Reference for γ and X fluxes (3)
76- 80 F5.2 GeV <Eg> Average γ-ray photon energy
82- 86 F5.2 --- del.g Derived lower limit for the γ-ray
Doppler factor, δγ
88- 92 F5.2 [10-7W] logLg γ-ray luminosity (erg/s)
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Note (1): Classification as follows:
H = HBL, high-peaked BL Lacertae object
L = LBL, low-peaked BL Lacertae object
F = FSRQ, flat spectrum radio quasars
Note (2): from Ackermann et al. 2011 (Cat. J/ApJ/743/171) and
Nolan et al. 2012 (Cat. J/ApJS/199/31)
Note (3): References are:
D01 = Donato et al. (2001, Cat. J/A+A/375/739)
NED = NED, http://ned.ipac.caltech.edu/
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Jan-2014