Prompt and afterglow emission properties of gamma-ray bursts with spectroscopically identified supernovae

Yuki Kaneko, Enrico Ramirez-Ruiz, Jonathan Granot, Chryssa Kouveliotou, Stan E. Woosley, Sandeep K. Patel, Evert Rol, Jean J.M. In 'T Zand, Alexander J. Van Der Horst, Ralph A.M.J. Wijers, Richard Strom

Research output: Contribution to journalArticlepeer-review


We present a detailed spectral analysis of the prompt and afterglow emission of four nearby long-soft gamma-ray bursts (GRBs 980425, 030329, 031203, and 060218) that were spectroscopically found to be associated with Type Ic supernovae and compare them to the general GRB population. For each event, we investigate the spectral and luminosity evolution and estimate the total energy budget based on broadband observations. The observational inventory for these events has become rich enough to allow estimates of their energy content in relativistic and subrelativistic form. The result is a global portrait of the effects of the physical processes responsible for producing long-soft GRBs. In particular, we find that the values of the energy released in mildly relativistic outflows appears to have a significantly smaller scatter than those found in highly relativistic ejecta. This is consistent with a picture in which the energy released inside the progenitor star is roughly standard, while the fraction of that energy that ends up in highly relativistic ejecta outside the star can vary dramatically between different events.

Original languageEnglish
Pages (from-to)385-402
Number of pages18
JournalAstrophysical Journal
Issue number1 I
StatePublished - 1 Jan 2007
Externally publishedYes


  • Gamma rays: bursts
  • Supernovae: general


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