Post-outburst radio spectral evolution of Cygnus X-3
  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 of six days. An estimate of the magnetic field in the emitting region is made from the spectral turnover and possible explanations for the spectral evolution are suggested. 
James CA Miller-Jones (Oxford), Katherine M Blundell (Oxford), Michael   P Rupen (NRAO), Anthony J Beasley (OVRO) & Amy J Mi...