A new γ-ray burst classification scheme from GRB 060614

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 journalArticle

356 Scopus citations

Abstract

Gamma-ray bursts (GRBs) are known to come in two duration classes, separated at ∼2 s. Long-duration bursts originate from star-forming regions in galaxies, have accompanying supernovae when these are near enough to observe and are probably caused by massive-star collapsars. Recent observations 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 mergers. 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 supernova, 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 (US)
Pages (from-to)1044-1046
Number of pages3
JournalNature
Volume444
Issue number7122
DOIs
StatePublished - Dec 21 2006

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Dive into the research topics of 'A new γ-ray burst classification scheme from GRB 060614'. Together they form a unique fingerprint.

  • Cite this

    Gehrels, N., Norris, J. P., Barthelmy, S. D., Granot, J., Kaneko, Y., Kouveliotou, C., Markwardt, C. B., Mészáros, P., Nakar, E., Nousek, J. A., O'Brien, P. T., Page, M., Palmer, D. M., Parsons, A. M., Roming, P. W. A., Sakamoto, T., Sarazin, C. L., Schady, P., Stamatikos, M., & Woosley, S. E. (2006). A new γ-ray burst classification scheme from GRB 060614. Nature, 444(7122), 1044-1046. https://doi.org/10.1038/nature05376