An Unexpected Re-Brightening in SHB 080503: Afterglow or mini-Supernova

Details An Unexpected Re-Brightening in SHB 080503: Afterglow or mini-Supernova An Unexpected Re-Brightening in SHB 080503: Afterglow or mini-Supernova

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2515b&link_type=abstract

Chandra proposal ID #09508297

Computer Science

Chandra Proposal Id #09508297

Scientific paper

Gaining a deep understanding of the origin and nature of Short (duration) Hard (spectrum) Gamma-ray Bursts (SHBs) is one of the last frontiers of GRB research. We can now say almost for certain that the progenitors of SHBs are different from those of Long-Soft GRBs (LSBs). This is based almost entirely on observations of the host galaxies of SHBs, which seem to be an older population than the hosts of LSBs: whereas the 50+ hosts of LSBs appear to be underluminous star bursts, and a handful of the bursts themselves have been directly associated with supernova (SN) explosions. SHB hosts span the range from giant elliptical to faint blue galaxies. A multi-wavelength campaign is critical to ameliorate the large theoretical uncertainty as to what types of progenitor systems -- a possible ``mini-SN'' (Li & Paczynski 1998) from a compact object mergers or binary WD merger (Levan et al. 2006) -- are at the origin of SHBs.

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