Superluminal Expansion of the Quasar 3C 345

Vlba Monitoring of the Qso 3c 345

The trails of superluminal jet components in 3C 111

In 1996 a major radio flux density outburst occurred in the broad-line radio galaxy 3C 111. It was followed by a particularly bright plasma ejection associated with a superluminal jet component, which has shaped the parsec-scale structure of 3C 111 for almost a decade. Here we present results from 18 epochs of Very Long Baseline Array (VLBA) observations conducted since 1995 as part of the VLBA...

The Global Jet Structure of the Archetypical Quasar 3C 273

A key question in the formation of the relativistic jets in active galactic nuclei (AGNs) is the collimation process of their energetic plasma flow launched from the central supermassive black hole (SMBH). Recent observations of nearby low-luminosity radio galaxies exhibit a clear picture of parabolic collimation inside the Bondi accretion radius. On the other hand, little is known of the obser...

A Deep XMM-Newton Observation of the Quasar 3C 287

We report on an XMM-Newton observation of the z = 1.055 quasar and Gigahertz Peaked Spectrum (GPS) source 3C 287. Our 62.3 ks observation provides an exceptional X-ray view of a prominent member of this important subclass of active galactic nuclei (AGNs). The X-ray spectra of 3C 287 are consistent with a simple absorbed power law with a spectral index ofΓ = 1.72± 0.02. Our fits imply a bolometr...

Slower Superluminal Velocity for the Quasar 1156 + 295

As part of an ongoing effort to observe high energy γ-ray blazars with VLBI, we have produced 8 and 2 GHz VLBI images, at ten epochs spanning the years 1988 to 1996, of the quasar 1156+295. The VLBI data have been taken from the Washington VLBI correlator’s geodetic database. We have detected four components and have measured their apparent speeds to be 8.8 ± 2.3, 5.3 ± 1.1, 5.5 ± 0.9, and 3.5 ...