Monitoring of the prompt radio emission from the unusual supernova   2004dj in NGC2403
  Supernova 2004dj in the nearby spiral galaxy NGC2403 was detected optically in July 2004. Peaking at a magnitude of 11.2, this is the brightest supernova detected for several years. Here we present Multi-Element Radio Linked Interferometer Network (MERLIN) observations of this source, made over a four month period, which give a position of R.A. = 07h37m17.044s, Dec =+65deg35'57.84" (J2000.0). We also present a well-sampled 5 GHz light curve covering the period from 5 August to 2 December 2004. With the exception of the unusual and very close SN 1987A, these observations represent the first detailed radio light curve for the prompt emission from a Type II-P supernova. 
R. J. Beswick (1), T. W. B. Muxlow (1), M. K. Argo (1), A. Pedlar (1),   J. M. Marcaide (2) and K. A. Wills (3)