Monitoring of the Prompt Radio Emission from the Unusual Supernova SN 2004dj in NGC 2403

Supernova SN 2004dj in the nearby spiral galaxy NGC 2403 was detected optically in 2004 July. 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 4 month period, that give a position of R.A. = 07h37m17044, decl. = +65°35'5784 (J2000.0). We also present a well-sampled 5 GHz light curve covering the period from 2004 August 5 to December 2. 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.

[1]  Thomas A. Weaver,et al.  The Physics of Supernova Explosions , 1986 .

[2]  N. Kawai,et al.  Discovery of an unusual hard X-ray source in the region of supernova 1987A , 1987, Nature.

[3]  K. Nomoto,et al.  Thermal X-ray emission from supernova 1987A , 1987, Nature.

[4]  R. Norris,et al.  A prompt radio burst from supernova 1987A in the Large Magellanic Cloud , 1987, Nature.

[5]  G. Skinner,et al.  Discovery of hard X-ray emission from supernova 1987A , 1987, Nature.

[6]  L. Ball,et al.  Radio emission from SNR 1987A , 1994 .

[7]  L. Ball,et al.  Radio Observations of SN 1987A at 843 MHz , 1995 .

[8]  D. Branch,et al.  The Probable Detection of SN 1923A: The Oldest Radio Supernova or The Youngest Supernova Remnant? , 1998, astro-ph/9805300.

[9]  J. Wheeler.  Supernovae and Gamma-Ray Bursts , 2000 .

[10]  Caltech,et al.  X-Ray, Optical, and Radio Observations of the Type II Supernovae 1999em and 1998S , 2001, astro-ph/0103196.

[11]  Marcos J. Montes,et al.  Radio emission from supernovae and gamma-ray bursters , 2002 .

[12]  J. Reynolds,et al.  Evolution of the Radio Remnant of SN 1987A: 1990-2001 , 2001, Publications of the Astronomical Society of Australia.

[13]  Stefan Immler,et al.  X-Ray Supernovae , 2003 .

[14]  The Progenitor of the Type II-P SN 2004dj in NGC 2403 , 2004, astro-ph/0408265.

[15]  W. K. Huchtmeier,et al.  A Catalog of Neighboring Galaxies , 2004 .

[16]  T. Muxlow,et al.  A possible radio supernova in the outer part of NGC 3310 , 2004, astro-ph/0405317.