The Fermi LAT detected an increase in γ-ray activity of the quasar 0836+710 (z=2.17) in Spring 2011 that culminated in a sharp γ-ray flare at the end of 2011 when the source reached a flux of 2.9×10−6 phot s−1cm−2 at 0.1-200 GeV. We monitor the quasar at optical wavelengths in photometric and polarimetric modes, at millimeter and centimeter wavelengths, and with the VLBA at 43 GHz. The optical brightness of the quasar increased by ~0.5 mag in R band and the degree of polarization oscillated between ~1% and ~6% during the highest γ-ray state, while the position angle of polarization rotated by ~300°. We have identified in the VLBA images a strong, highly polarized component that moves with an apparent speed of ~20 c. The component emerged fr...
Context. Flat-spectrum radio-quasars (FSRQs) are rarely detected at very high energies (E ≥ 100 GeV)...
This is the first report of Fermi Gamma-Ray Space Telescope observations of the quasar 3C 454.3, whi...
The flat-spectrum radio quasar QSO B1420+326 underwent an enhanced γ-ray flux state seen by Fermi-LA...
The Fermi LAT detected an increase in γ-ray activity of the quasar 0836+710 (z=2.17) in Spring 2011 ...
We report on results of a multiband monitoring campaign from radio to γ -rays of the high-redshift f...
Abstract. We analyze total and polarized intensity images of the quasar PKS 0420-014 obtained monthl...
Casadio, Carolina et. al.We perform a multi-wavelength polarimetric study of the quasar CTA 102 duri...
We analyze the broadband activity of the flat spectrum radio quasar PKS 1222+216 from 2008 to 2015 u...
We analyze total and polarized intensity images of the quasar PKS 0420-014 obtained monthly with the...
We perform monthly monitoring of the quasar 1633+382 (4C+38.41) within a sample of gamma-ray blazars...
We present a study of the parsec-scale multifrequency properties of the quasar S4 1030+61 during a p...
We investigate the radio and γ-ray variability of the flat spectrum radio quasar PKS 1510-089 in the...
Ever since the discovery by the Fermi mission that active galactic nuclei (AGN) produce copious amo...
Aims. On the basis of the first 20 months of Fermi-LAT data and optical monitoring, the qu...
An 11 day monitoring campaign in late 2005 reveals clear correlation in polarization between the opt...
Context. Flat-spectrum radio-quasars (FSRQs) are rarely detected at very high energies (E ≥ 100 GeV)...
This is the first report of Fermi Gamma-Ray Space Telescope observations of the quasar 3C 454.3, whi...
The flat-spectrum radio quasar QSO B1420+326 underwent an enhanced γ-ray flux state seen by Fermi-LA...
The Fermi LAT detected an increase in γ-ray activity of the quasar 0836+710 (z=2.17) in Spring 2011 ...
We report on results of a multiband monitoring campaign from radio to γ -rays of the high-redshift f...
Abstract. We analyze total and polarized intensity images of the quasar PKS 0420-014 obtained monthl...
Casadio, Carolina et. al.We perform a multi-wavelength polarimetric study of the quasar CTA 102 duri...
We analyze the broadband activity of the flat spectrum radio quasar PKS 1222+216 from 2008 to 2015 u...
We analyze total and polarized intensity images of the quasar PKS 0420-014 obtained monthly with the...
We perform monthly monitoring of the quasar 1633+382 (4C+38.41) within a sample of gamma-ray blazars...
We present a study of the parsec-scale multifrequency properties of the quasar S4 1030+61 during a p...
We investigate the radio and γ-ray variability of the flat spectrum radio quasar PKS 1510-089 in the...
Ever since the discovery by the Fermi mission that active galactic nuclei (AGN) produce copious amo...
Aims. On the basis of the first 20 months of Fermi-LAT data and optical monitoring, the qu...
An 11 day monitoring campaign in late 2005 reveals clear correlation in polarization between the opt...
Context. Flat-spectrum radio-quasars (FSRQs) are rarely detected at very high energies (E ≥ 100 GeV)...
This is the first report of Fermi Gamma-Ray Space Telescope observations of the quasar 3C 454.3, whi...
The flat-spectrum radio quasar QSO B1420+326 underwent an enhanced γ-ray flux state seen by Fermi-LA...