A fundamental test of the fireball model for GRBs

Details A fundamental test of the fireball model for GRBs A fundamental test of the fireball model for GRBs

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...39s&link_type=abstract

XMM-Newton Proposal ID #06512902

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Grb 1, Grb 1

Scientific paper

The most extreme Gamma-Ray Bursts (GRBs) radiate equivalent isotropic energies close to 1E54 erg in electromagnetic radiation; energies which cannot be accommodated in core-collapse models. Thus GRBs are thought to be narrowly beamed, which should give rise to an achromatic light curve break as the outflow slows. However, observations have not been able to securely identify X-ray light curve breaks leading to serious concerns about the total energetics which may undermine the entire GRB paradigm. Thus we seek observations totalling 120 ks to test for the absence of such breaks in the X-ray light curves of two further highly energetic GRBs, continuing our campaign to use the most extreme sources in the GRB population to re-examine the widely accepted GRB core-collapse models.

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