Observations with the VLA

On 2003 Jan 26.23 UT we detected a radio transient coincident with the optical position of SN2003L. We subsequently initiated an intense radio monitoring campaign at the Very Large Array (VLA) to trace the evolution of the radio emission from the supernova. Data were taken in standard continuum observing mode with a bandwidth of 2 x 50 MHz centered on frequencies 8.5, 15.0 and 22.5 GHz. Flux density measurements were derived using calibrator 3C286 and phase referenced against calibrators J1118+125, J1120+134, and J1103+119. Data were reduced using standard packages within the Astronomical Image Processing System (AIPS). At 8.5 GHz (our most densely sampled light-curve) typical flux uncertainties were — 60 ^Jy for an average integration time of 10 minutes. The results of our radio monitoring campaign of SN2003L are summarized as Fig. 1. These observations demonstrate a broad spectrum, similar to that observed for SN 1998bw.

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