J/A+A/596/A45 Radio light curves of 8 AGN (Fuhrmann+, 2016) ================================================================================ The F-GAMMA programme: multi-frequency study of active galactic nuclei in the Fermi era. Programme description and the first 2.5 yrs of monitoring. Fuhrmann L., Angelakis E., Zensus J.A., Nestoras I., Marchili N., Pavlidou V., Karamanavis V., Ungerechts H., Krichbaum T.P., Larsson S., Lee S.S., Max-Moerbeck W., Myserlis I., Pearson T.J., Readhead A.C.S., Richards J.L., Sievers A., Sohn B.W. =2016A&A...596A..45F (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Active gal. nuclei ; BL Lac objects ; Gamma rays Keywords: galaxies: active - BL Lacertae objects: general - quasars: general - galaxies: jets - gamma rays: galaxies - radiation mechanisms: non-thermal Abstract: To fully exploit the scientific potential of the Fermi mission for the physics of active galactic nuclei (AGN), we initiated the F-GAMMA programme. Between 2007 and 2015 the F-GAMMA was the prime provider of complementary multi-frequency monitoring in the radio regime. Aims. We quantify the radio variability of {gamma}-ray blazars. We investigate its dependence on source class and examine whether the radio variability is related to the {gamma}-ray loudness. Finally, we assess the validity of a putative correlation between the two bands. Methods. The F-GAMMA performed monthly monitoring of a sample of about 60 sources at up to twelve radio frequencies between 2.64 and 228.39GHz. We perform a time series analysis on the first 2.5-yr data set to obtain variability parameters. A maximum likelihood analysis is used to assess the significance of a correlation between radio and {gamma}-ray fluxes. We present light curves and spectra (coherent within ten days) obtained with the Effelsberg 100m and IRAM 30m telescopes. All sources are variable across all frequency bands with amplitudes increasing with frequency up to rest frame frequencies of around 60-80GHz as expected by shock-in-jet models. Compared to flat-spectrum radio quasars (FSRQs), BL Lacertae objects (BL Lacs) show systematically lower variability amplitudes, brightness temperatures, and Doppler factors at lower frequencies, while the difference vanishes towards higher ones. The time scales appear similar for the two classes. The distribution of spectral indices appears flatter or more inverted at higher frequencies for BL Lacs. Evolving synchrotron self-absorbed components can naturally account for the observed spectral variability. We find that the Fermi-detected sources show larger variability amplitudes, brightness temperatures, and Doppler factors than non-detected ones. Flux densities at 86.2 and 142.3GHz correlate with 1GeV fluxes at a significance level better than 3{sigma}, implying that {gamma} rays are produced very close to the mm-band emission region. Description: The radio light curves shown in Figures 1 and 2 in tabular form. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file sources.dat 66 8 List of sources with radio light curve lc/* . 8 Individual radio light curves -------------------------------------------------------------------------------- Byte-by-byte Description of file: sources.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Name Name (JHHMM+DDMM) 12- 23 A12 --- OName Other name 25- 30 A6 --- Class Source class 32- 33 I2 h RAh Right ascension (J2000) 35- 36 I2 min RAm Right ascension (J2000) 38- 41 F4.1 s RAs Right ascension (J2000) 43 A1 --- DE- Declination sign (J2000) 44- 45 I2 deg DEd Declination (J2000) 47- 48 I2 arcmin DEm Declination (J2000) 50- 51 I2 arcsec DEs Declination (J2000) 53- 66 A14 --- FileName Name of the file with radio light curve file in subdirectory lc -------------------------------------------------------------------------------- Byte-by-byte Description of file: lc/* -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 F9.3 d MJD Modified Julian Day 11- 16 F6.2 GHz Freq Observing Frequency (1) 18- 23 F6.3 Jy S Flux Density 26- 30 F5.3 Jy e_S The error in the Flux Density -------------------------------------------------------------------------------- Note (1): Observed frequencies : 2.64, 4.85, 8.35, 10.45, 14.60, 23.05, 32.00, 42.00, 43.00, 86.24, 142.33, and 228.93GHz. -------------------------------------------------------------------------------- Acknowledgements: Emmanouil Angelakis, eangelakis(at)mpifr-bonn.mpg.de Vassilis Karamanavis, vkaramanavis(at)mpifr-bonn.mpg.de ================================================================================ (End) Patricia Vannier [CDS] 12-Oct-2016