J/A+A/375/739 Hard X-ray properties of blazars (Donato+, 2001)
Hard X-ray properties of blazars.
Donato D., Ghisellini G., Tagliaferri G., Fossati G.
<Astron. Astrophys. 375, 739 (2001)>
=2001A&A...375..739D 2001A&A...375..739D
ADC_Keywords: BL Lac objects ; QSOs ; X-ray sources
Keywords: BL Lacertae objects: general - X-rays: galaxies
Abstract:
We have considered all blazars observed in the X-ray band and for
which the slope of the X-ray spectrum is available. We have collected
421 spectra of 268 blazars, including 12 archival unpublished ASCA
spectra of 7 blazars whose analysis is presented here. The X-ray
spectra of blazars show trends as a function of their power,
confirming that the blazar overall energy distribution can be
parameterized on the basis of one parameter only, i.e. the bolometric
luminosity. This is confirmed by the relatively new hard (2-10 keV)
X-ray data. Our results confirm the idea that in low power objects the
X-ray emission mechanism is the synchrotron process, dominating both
the soft and the hard X-ray emissions. Low energy peaked BL Lac
objects are intermediate, often showing harder spectra in the hard
X-ray band, suggesting that the synchrotron process dominates in the
soft band, with the inverse Compton process dominating at high
energies. The most powerful objects have X-ray spectra that are flat
both in the soft and in the hard band, consistent with a dominating
inverse Compton component.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 81 422 Catalogue
refs.dat 133 58 References
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See also:
VII/224 : Quasars and Active Galactic Nuclei (10th Ed.) (Veron+ 2001)
VIII/5 : Bright Extragalactic Radio Sources (1Jy) (Kuehr+, 1981)
J/ApJ/525/127 : RGB sample of BL Lacertae objects (Laurent-Muehleisen+ 1999)
J/A+A/311/384 : ROSAT observations of BL Lacertae objects (lamer+ 1996)
J/MNRAS/277/1477 : A catalogue of BL Lacertae objects (Padovani+ 1995)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name IAU name of the source
(based on 1950 or 2000 positions)
11- 15 F5.3 --- z ? Redshift
17- 22 F6.3 Jy S5GHz ? Radio flux at 5 GHz
24- 27 A4 --- r_S5GHz Reference for the radio flux, in ref.dat file
29- 34 F6.3 mJy Sopt Optical flux at 5500Å
36- 39 A4 --- r_Sopt Reference for the optical flux,
in ref.dat file
41- 46 F6.3 uJy SX X-ray flux at 1 keV
48- 52 A5 --- r_SX Reference for the X-ray flux, in ref.dat file
54- 58 F5.3 --- Sp+Index X-ray photon spectral index
60- 64 F5.3 --- e_Sp+Index ? Error on the X-ray spectral index
66- 70 A5 --- r_Sp+Index Reference for the X-ray spectral index,
in ref.dat file
72 I1 --- Class [1/3]? Classification of the source (1)
74- 78 A5 --- r_Class Reference for class, in ref.dat file
80- 81 A2 --- Sat Observing satellite (2)
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Note (1): Class:
1 = HBL, High energy peaked BL Lacs
2 = LBL, Low Peaked BL Lac objects
3 = FSRQ, Flat Spectrum Radio Quasars
Note (2): Observing satellites:
AS = ASCA
RO = ROSAT
SA = BeppoSAX
EX = EXOSAT
EI = Einstein
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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- 5 A5 --- Ref Reference code
7- 25 A19 --- BibCode BibCode
27- 54 A28 --- Aut Author's name
55-133 A79 --- Com Comments
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 25-Sep-2001