Radio Analysis of SN 2004C Reveals an Unusual CSM Density Profile as a Harbinger of Core Collapse

Lindsay DeMarchi, R. Margutti, J. Dittman +13

We present extensive multi-frequency VLA and VLBA observations of the radio-bright supernova (SN) IIb SN 2004C that span $\sim (40-2793)$ days post-explosion. We interpret the tempo…