A new gamma-ray burst classification scheme from GRB060614

N. Gehrels, J.~P. Norris, S.~D. Barthelmy, J. Granot, Y. Kaneko, C. Kouveliotou, C.~B. Markwardt, P. Mészáros, E. Nakar, J.~A. Nousek, P.~T. O'Brien, M. Page, D.~M. Palmer, A.~M. Parsons, P.~W.~A. Roming, T. Sakamoto, C.~L. Sarazin, P. Schady, M. Stamatikos, S.~E. Woosley

Research output: Contribution to journalArticlepeer-review

362 Citations (Scopus)

Abstract

Gamma-ray bursts (GRBs) are known to come in two duration classes1, separated at ∼2 s. Long-duration bursts originate from star-forming regions in galaxies2, have accompanying supernovae when these are near enough to observe and are probably caused by massive-star collapsars3. Recent observations4,5,6,7,8,9,10 show that short-duration bursts originate in regions within their host galaxies that have lower star-formation rates, consistent with binary neutron star or neutron star–black hole mergers11,12. Moreover, although their hosts are predominantly nearby galaxies, no supernovae have been so far associated with short-duration GRBs. Here we report that the bright, nearby GRB 060614 does not fit into either class. Its ∼102-s duration groups it with long-duration GRBs, while its temporal lag and peak luminosity fall entirely within the short-duration GRB subclass. Moreover, very deep optical observations exclude an accompanying supernova13,14,15, similar to short-duration GRBs. This combination of a long-duration event without an accompanying supernova poses a challenge to both the collapsar and the merging-neutron-star interpretations and opens the door to a new GRB classification scheme that straddles both long- and short-duration bursts.
Original languageEnglish
Pages (from-to)1044-1046
Number of pages3
JournalNature
Volume444
DOIs
Publication statusPublished - 1 Dec 2006

Keywords

  • Astrophysics

Fingerprint Dive into the research topics of 'A new gamma-ray burst classification scheme from GRB060614'. Together they form a unique fingerprint.

Cite this