Gamma-Ray Bursts: From Progenitors to Probes

Details Gamma-Ray Bursts: From Progenitors to Probes Gamma-Ray Bursts: From Progenitors to Probes

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..405f&link_type=abstract

NOAO Proposal ID #2010A-0405

Astronomy and Astrophysics

Astronomy

Scientific paper

GRB astronomy is focused on two goals: understanding the physics and progenitors of the bursts and using them as probes of the high-z Universe. This proposal addresses both goals. We will undertake rapid imaging and spectroscopy of short-duration GRBs to directly measure their redshifts and environments. These observations will zero in on the identity of the progenitors and the energy extraction mechanism, and provide the first test of progenitor ejections from their host galaxies. In addition, we will use our automated Gemini trigger to obtain iz-band imaging, leading to spectroscopy of all rapidly-observable GRBs, to identify and characterize bursts from the end of reionization, 5.8 < z < 7.2. Spectroscopy of these bursts will constrain re-ionization through the IGM neutral fraction, and probe the ISM of the highest redshift galaxies. At z<6 we will continue our use of GRBs to probe the ISM of damped Lyman-alpha systems, combined with follow-up Spitzer/Keck/Magellan observations.

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