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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 52 398 The Metsahovi BL Lac sample
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
Bytes Format Units Label Explanations
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)
Note (1): BL Lac classification as follows: HBL = high-energy-peaked BL Lacs IBL = intermediate BL Lacs LBL = low-energy-peaked BL Lacs
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Nov-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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