VLBA polarimetric observations of the CSS quasar 3C 147

VLBA polarimetric observations of 3C 286 at 5 GHz

Polarimetric observations at 5 GHz using the VLBA are reported of the compact steep spectrum source 3C 286. There are two flat spectrum knots but both are too highly polarized to be a typical core component and both appear to be resolved in VLBA measurements. The morphology and polarization structure of this source is also quite distinct from typical core–jet sources. It is suggested that the c...

High Rotation Measure in the Steep Spectrum Quasar 3c 147

We present VLBA polarimetric observations of the steep-spectrum quasar 3C 147 (0538+498) made at four frequencies in the available 5-GHz band, from which we derived milliarcsecond-resolution images of the total intensity, polarization, and rotation measure distributions. The jet extending to the southwest is followed out to a distance of about 200 mas from the core. The jet shows several gentle...

Vlba Monitoring of the Qso 3c 345

VLBA Observations of Blazars

VLBI observations of blazars provide the closest look at compact jets that are thought to be responsible for the variable emission of blazars from radio to γ-ray wavelengths. It appears that flux variability at different wavelengths is connected to changes in jet structure near its base. The changes happen on timescales of weeks or less, which require frequent VLBI monitoring to follow. Current...

MAGIC observations and multifrequency properties of the flat spectrum radio quasar 3C 279 in 2011

Aims. We study the multifrequency emission and spectral properties of the quasar 3C 279 aimed at identifying the radiation processes taking place in the source. Methods. We observed 3C 279 in very-high-energy (VHE, E > 100 GeV) γ-rays, with the MAGIC telescopes during 2011, for the first time in stereoscopic mode. We combined these measurements with observations at other energy bands: in high-e...