The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area
Telescope (LAT) in two years of scientific operation is presented. The second LAT AGN …

We present simultaneous Planck, Swift, Fermi, and ground-based data for 105 blazars
belonging to three samples with flux limits in the soft X-ray, hard X-ray, and γ-ray bands, with …

We present a detailed statistical analysis of the correlation between radio and gamma-ray
emission of the active galactic nuclei (AGNs) detected by Fermi during its first year of …

ABSTRACT We investigate the Fermi Large Area Telescope γ-ray and 15 GHz Very Long
Baseline Array radio properties of a joint γ-ray and radio-selected sample of active galactic …

We compare the γ-ray photon flux variability of northern blazars in the Fermi/LAT First
Source Catalog with 37 GHz radio flux density curves from the Metsähovi quasar monitoring …

ABSTRACT A significant fraction (∼ 30%) of the γ-ray sources listed in the second
Fermi/LAT (2FGL) catalog is still of unknown origin, being not yet associated with …

We present results from four years of twice-weekly 15 GHz radio monitoring of about 1500
blazars with the Owens Valley Radio Observatory 40 m telescope. Using the intrinsic …

Abstract We present multifrequency Very Long Baseline Array (VLBA) follow-up
observations of VLBA Imaging and Polarimetry Survey sources identified as likely compact …

Context. Rapid variations in optical flux are seen in many quasars and all blazars. The
amount of variability in different classes of active galactic nuclei has been studied …

The radio properties of blazars detected by the Large Area Telescope (LAT) on board the
Fermi Gamma-ray Space Telescope have been observed contemporaneously by the Very …