What made GRBs 060505 and 060614?
arXiv:0704.1421
Abstract
Recent observations of two nearby SN-less long-duration gamma-ray bursts (GRBs), which share no obvious characteristics in their prompt emission, suggest a new phenomenological type of massive stellar death. Here we briefly review the observational properties of these bursts and their proposed hosts, and discuss whether a new GRB classification scheme is needed.
4 pages, 1 figure. Proceedings of the Amsterdam RTN (GRBs: an enigma and a tool) meeting, March 19-23, 2007. To appear in New Astronomy Reviews