ar X iv : a st ro - p h / 99 06 35 8 v 1 2 3 Ju n 19 99 Helical motions in the jet of blazar 1156 + 295

ar X iv : a st ro - p h / 99 06 25 1 v 1 1 5 Ju n 19 99 Inflow and outflows in NGC 2992 / 3

We present observational evidences for inflow and outflows in the interacting system Arp 245 (NGC 2992/3).

ar X iv : a st ro - p h / 99 06 32 6 v 1 2 1 Ju n 19 99 Ultraviolet and Multiwavelength Variability of the Blazar 3 C 279 : Evidence for Thermal Emission

The γ-ray blazar 3C 279 was monitored on a nearly daily basis with IUE, ROSAT and EGRET for three weeks between December 1992 and January 1993. During this period, the blazar was at a historical minimum at all wavelengths. Here we present the UV data obtained during the above multiwavelength campaign. A maximum UV variation of ∼50% is detected, while during the same period the X-ray flux varied...

ar X iv : a st ro - p h / 98 06 04 8 v 1 3 J un 1 99 8 MERLIN observations of GRS 1915 + 105 : a progress report

Abstract We present a progress report on MERLIN radio imaging of a radio outburst from GRS 1915+105. The major ejection occurred at the end of a ∼ 20 day ‘plateau’ state, characterised by low/hard X-ray fluxes and a relatively strong flat-spectrum radio component. Apparent superluminal motions have been mapped with unprecedented resolution, and imply higher velocities in the jet than previously...

ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY

X iv : a st ro - p h / 99 06 15 8 v 1 9 J un 1 99 9 A VLBI and MERLIN Survey of faint , compact radio sources

We present preliminary results from a VLBI survey at λ = 6 cm of a sample of 35 sources with flux densities of 2 – 100 mJy. These sources were selected from the VLA FIRST survey at λ = 20 cm, in a 3 degree field around the bright calibrator 1156+295, simply by imposing S 20 > 10 mJy and θ < 5 arcsec. MERLIN observations at λ6 cm detected 70/127 of these sources with a threshold of 2 mJy at 50 m...