J/A+A/445/441 SED of BL Lacertae objects (Nieppola+, 2006)
Spectral energy distributions of a large sample of BL Lacertae objects.
Nieppola E., Tornikoski M., Valtaoja E.
<Astron. Astrophys., 445, 441-450 (2006)>
=2006A&A...445..441N 2006A&A...445..441N
ADC_Keywords: BL Lac objects ; Energy distributions
Keywords: galaxies: active - BL Lacertae objects: general -
radiation mechanisms: non-thermal
Abstract:
We have collected a large amount of multifrequency data for objects in
the Metsahovi Radio Observatory BL Lacertae sample and computed their
spectral energy distributions (SED) in the logν-logνF
representation. This is the first time the SEDs of BL Lacs have been
studied with a sample of over 300 objects. The synchrotron components
of the SEDs were fitted with a parabolic function to determine the
synchrotron peak frequency, νpeak. We checked the dependence
between luminosities at several frequency bands and synchrotron peak
frequency to test the blazar sequence scenario, which states that the
source luminosity depends on the location of the synchrotron peak. We
also calculated broad band spectral indices and plotted them against
each other and νpeak.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 52 398 The Metsahovi BL Lac sample
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See also:
J/A+AS/98/393 : 1Jy BL Lac Objects: Observational Data (Stickel+ 1993)
J/A+AS/106/361 : CCD Photometry of BL Lac objects (Xie+ 1994)
J/A+AS/109/267 : Radio to X-Ray distribution of BL Lac Objects (Giommi+, 1995)
J/A+A/401/927 : The HRX-BL Lac sample (Beckmann+, 2003)
J/AJ/129/2542 : BL Lac from SDSS (Collinge+, 2005)
J/A+A/434/385 : X-ray/radio data of high energy peaked BL Lacs (Giommi+, 2005)
J/other/NewA/11.27 : 2MASS observation of BL Lac objects (Chen+, 2005)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Name
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 30 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
44- 48 F5.2 [Hz] logFpeak ?=- Synchrotron peak frequency
50- 52 A3 --- Class BL Lac classification (1)
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Note (1): BL Lac classification as follows:
HBL = high-energy-peaked BL Lacs
IBL = intermediate BL Lacs
LBL = low-energy-peaked BL Lacs
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Nov-2006