IR Study of Gamma-Ray Bursts

Details IR Study of Gamma-Ray Bursts IR Study of Gamma-Ray Bursts

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...76h&link_type=abstract

Spitzer Proposal ID #76

Physics

Scientific paper

Gamma Ray Bursts are interesting and enigmatic phenomena. With the accurate positioning given by Beppo-Sax and the rapid followup in the visible and radio, several bursts have been found to be associated with distant galaxies at z~1 and greater. Recent studies have provided evidence for collimated outflows and shocks associated with GRB's strenghtening the connection between them and supernovae. If GRB's are associated with young star-forming regions, then there is likely to be strong infrared emission from the heated dust. Furthermore, there is likely to be considerable extinction at shorter wavelengths, rendering visible and near IR observations less than definitive. We use the infrared cameras to measure the 4.5 to 24 um energy distribution and morphology of the putative emitting regions. For regions sufficiently bright, the spectrometer will provide diagnostics of the emission mechanisms and the redshift. The redshift is especially crucial in the cases where no host galaxy has been detected (or the host galaxy is too faint for ground-based redshift determination).

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