The Enigmatic Supernova 2001em: Off-Axis GRB Afterglow?

Details The Enigmatic Supernova 2001em: Off-Axis GRB Afterglow? The Enigmatic Supernova 2001em: Off-Axis GRB Afterglow?

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3641v&link_type=abstract

Spitzer Proposal ID #3641

Computer Science

Scientific paper

Gamma-ray burst sources (GRBs) are among the most energetic events in the Universe. Long-duration GRBs originate from the collimated, relati- vistic jets in the collapsar scenario. Compelling evidence exists for the association of two Type Ib/c supernovae, thought to arise from very massive Wolf-Rayet star progenitors, with GRBs. Why are not most, or all, SNe Ib/c associated with GRBs? Possibly many GRBs do not have detectable gamma-ray emission, due to off-axis beaming, yet they will be detectable as SNe Ib/c, with late-time afterglows. Recently we have detected the puzzling SN Ic 2001em in the radio, two years after explo- sion. We make specific model predictions that, if this is a GRB afterglow, it should be a luminous mid-IR source, detectable with Spitzer. Observa- tions with Spitzer, in concert with nearly contemporaneous observations at a rich variety of wavelengths, will provide valuable insight into this event and its relationship to GRBs.

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