J/A+A/488/867 Synchrotron peak frequency of 135 AGN (Nieppola+, 2008) ================================================================================ Blazar sequence - an artefact of Doppler boosting. Nieppola E., Valtaoja E., Tornikoski M., Hovatta T., Kotiranta M. =2008A&A...488..867N ================================================================================ ADC_Keywords: Active gal. nuclei ; QSOs ; Energy distributions Keywords: galaxies: active - galaxies: BL Lacertae objects: general - galaxies: quasars: general - radiation mechanisms: non-thermal Abstract: The blazar sequence is a scenario in which the bolometric luminosity of the blazar governs the appearance of its spectral energy distribution. The most prominent result is the significant negative correlation between the synchrotron peak frequencies and the synchrotron peak luminosities of the blazar population. Observational studies of the blazar sequence have, in general, neglected the effect of Doppler boosting. We study the dependence of both the synchrotron peak frequency and luminosity with Doppler-corrected quantities. We determine the spectral energy distributions of 135 radio-bright AGN and find the best-fit parabolic function for the distribution to quantify their synchrotron emission. The corresponding measurements of synchrotron peak luminosities and frequencies are Doppler-corrected with a new set of Doppler factors calculated from variability data. The relevant correlations for the blazar sequence are determined for these intrinsic quantities. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 70 135 The sample and the observational synchrotron peak frequencies obtained in this work -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- Name Source Name (HHMM+DDd or HHMM+DDMM) 11- 22 A12 --- OName Other name 24- 25 I2 h RAh Right ascension (J2000) 27- 28 I2 min RAm Right ascension (J2000) 30- 34 F5.2 s RAs Right ascension (J2000) 36 A1 --- DE- Declination sign (J2000) 37- 38 I2 deg DEd Declination (J2000) 40- 41 I2 arcmin DEm Declination (J2000) 43- 47 F5.2 arcsec DEs Declination (J2000) 49 A1 --- Jy [*] * when in 1.2Jy AGN sample 51- 53 A3 --- Class AGN Classification (3) 55- 59 F5.2 [Hz] lognup ? Observational synchrotron peak frequency (1) 61 A1 --- n_lognup [1] Determination from highest flux density (2) 64- 68 F5.3 --- z ? Redshift 70 A1 --- Bl [*] * when in Blazar sample -------------------------------------------------------------------------------- Note (1): The values of {nu}_p_ listed here have been determined directly from the SEDs and are not corrected for redshift nor for Doppler boosting. Note (2): 1 means that log{nu}_p_ was determined from the highest flux density measurement of the synchrotron component of the SED (see Sect.3.1) Note (3): Classes are as follows: HPQ = highly polarized quasars (>=3%) LPQ = low polarization quasars (>=3%) QSO = non-polarized quasars BLO = BL Lac objects GAM = radio galaxies -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 14-Nov-2008