22 research outputs found
MERLIN observations of GRS 1915+105 : a progress report
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 an approximately 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 derived.Comment: 4 pages, 2 figures. To be published in New Astronomy Reviews, as part
of proceedings of 2nd workshop on Galactic sources with relativistic jet
Light curves and radio structure for the September 1999 transient event in XTE J1819-254 (=SAX J1819.3-2325 = V4641 Sagittarii)
Asymmetric depolarization in powerful extragalactic radio sources
SIGLEAvailable from British Library Document Supply Centre- DSC:D88149 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
VLBI observations of SNR in M82 - Is 41.95+575 an anomalous SNR or something else ?
Global VLBI 1.7GHz datasets from 1990 and 1998 have been used to study the evolution of SNR 41.95+575 in M82. An expansion velocity of around 1800 km/s is found with an implied birth around 1915. A young 41.95+575 would resemble radio supernovae seen in Arp220, although it could also be an evolving accretion disc system</jats:p