12 papers · 1 filter
SS433: Observation of the circumbinary disc and extraction of the system mass
Katherine Blundell, Michael Bowler, Linda Schmidtobreick
The so-called "stationary" H-alpha line of SS433 is shown to consist of three components. A broad component is identified as emitted in that wind from the accretion disc which grow…
Radio-loud and radio-quiet quasars: one population, different epochs of observation
Katherine Blundell
I bring together evidence for the rapidity with which quasars' radio synchrotron lobe emission fades and for the intermittency with which jet plasma is ejected from individual quas…
The 6C** sample of steep-spectrum radio sources: II - Redshift distribution and the space density of high-redshift radio galaxies
Maria J. Cruz, Matt J. Jarvis, Steve Rawlings +1
We use the 6C** sample to investigate the co-moving space density of powerful, steep-spectrum radio sources. This sample, consisting of 68 objects, has virtually complete K-band ph…
Determining the nature of the faint X-ray source population near the Galactic Centre
Reba M. Bandyopadhyay, Andrew J. Gosling, Katherine M. Blundell +5
We present results of a multi-wavelength program to study the faint discrete X-ray source population discovered by Chandra in the Galactic Centre (GC). From IR imaging obtained wit…
Exploring the Nature of Weak Chandra Sources near the Galactic Centre
R. M. Bandyopadhyay, K. M. Blundell, Ph. Podsiadlowski +5
We present early results from the first IR imaging of the weak X-ray sources discovered in a recent Chandra survey towards the Galactic Centre. From our VLT observations we will id…
Post-outburst radio spectral evolution of Cygnus X-3
James CA Miller-Jones, Katherine M Blundell, Michael P Rupen +2
Multifrequency VLA and OVRO observations of the radio outburst of Cygnus X-3 in September 2001 are presented, illustrating the evolution of the spectrum of the source over a period…