The Energetics and Host Galaxies of X-ray Flashes

Details The Energetics and Host Galaxies of X-ray Flashes The Energetics and Host Galaxies of X-ray Flashes

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1719f&link_type=abstract

Chandra Proposal ID #06500904

Mathematics

Logic

Chandra Proposal Id #06500904

Scientific paper

The X-ray flashes (XRFs) occur at the cosmological distances of gamma-ray bursts (GRBs), but possess a non-thermal spectrum that peaks in the X-ray rather than the gamma-ray band. With an explosive energy similar to that of GRBs and supernovae (SNe), XRFs appear to couple an intermediate fraction of their energy to highly-relativistic ejecta. We have discovered the first four XRF afterglows and three of their likely host galaxies, and we propose a Chandra-HST program to substantially increase this sample. Chandra observations of the XRF afterglow will provide sub-arcsec astrometry and an estimate of its explosive energy; subsequent HST observations will characterize its host galaxy. These observations will help clarify the nature of the XRFs, the most likely link between GRBs and SNe.

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