Modelling of Infrared emission from Cyg X-3 and the UKIRT IRCAM3 point spread function

Modelling of the point spread function of the UKIRT IRCAM3 array was conducted in order to test any extended emission around the X-ray binary Cyg X-3. We found that the point spread function cannot be represented by a simple Gaussian, but modelling of the stars required additional functions namely Lorrentzian and exponential components. After modelling for the PSF, we found that Cyg X-3 could be represented by two stellar-type profiles, 0.56" apart.Comment: 7 pages, 4 figures, to appear in Vistas in Astronomy as part of a conference at Jodrell Bank, Apr 96, Relative Jets in X-ray binaries. Style files include

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

The astrophysics of energetic x-ray binaries

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN022648 / BLDSC - British Library Document Supply CentreGBUnited Kingdo