The B3-VLA quasar sample

The B3-VLA CSS sample. VII: WSRT Polarisation Observations and the Ambient Faraday Medium Properties Revisited

We present new polarisation observations at 13 cm, acquired using the Westerbork Synthesis Radio Telescope (WSRT), of 65 sources, from the B3-VLA sample of Compact Steep-Spectrum sources. These new data are combined with our VLA polarisation data, at 3.6, 6 and, 21 cm, presented in a previous paper. Due to the multi-channel frequency capabilities of the WSRT, these new 13 cm observations enable...

z Table 1. The quasar sample

The SDSS-XMM Quasar Sample: First Results

We have searched in the XMM-Newton public archive for quasars in the Sloan Digital Sky Survey (SDSS) First Data Release (DR1), and found 55 lying in the field of a XMM-Newton observation with exposure times >20 ksec (as of August, 2004). The 35 quasars which yielded good X-ray spectra span redshifts from 0.5 to 2.5. The large collecting area of XMM-Newton allows us to investigate the dependence...

The EMSS Radio Loud Quasar Sample

We construct the first X-ray selected sample of radio-loud quasars from the EMSS survey. The X–ray selection allows us to explore the properties of radio–loud quasars 10–100 weaker than classical samples in the radio band. There are no radio–loud quasars whose synchrotron peak reaches the UV–soft X–ray band at these (radio) flux levels (as occurs for BL Lac objects selected in the X–ray band), ...

The highest redshift radio quasar as seen with the EVN and the VLA

Abstract. We report on European VLBI Network (EVN) and Very Large Array (VLA) observations of SDSS J0836+0054, the most distant radio-loud quasar known at present (z = 5.774). The source, with a total flux density of 1.1 mJy, shows a compact structure at ∼ 10 mas angular resolution at 1.6 GHz frequency, with no indication of multiple images produced by gravitational lensing within a 4′′ × 4′′ f...