GRB 060614 Opens a New Window on Short and Long Burst Categorization

Details GRB 060614 Opens a New Window on Short and Long Burst Categorization GRB 060614 Opens a New Window on Short and Long Burst Categorization

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20922707g&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #227.07; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We have learned in the Swift era that short and long bursts have very different origin. Short burst are produced by old-population stars, perhaps through binary mergers. Long bursts are produced by young-population stars, most likely as a collapsar. Until last summer, all well-observed long bursts at low redshift (z<0.2) had associated supernova explosions. GRB 060614 is an important exception. It is a long burst with a duration of 100 s that was located in a star-forming galaxy at z=0.125 but had no supernova detected to stringent limits. We show that the spectral lag for this event groups it with short bursts. Implications will be presented.

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