Linked Life Data

14614498

Source:http://linkedlifedata.com/resource/pubmed/id/14614498

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6963
pubmed:dateCreated
2003-11-17
pubmed:abstractText
Past studies have suggested that long-duration gamma-ray bursts have a 'standard' energy of E(gamma) approximately 10(51) erg in the ultra-relativistic ejecta, after correcting for asymmetries in the explosion ('jets'). But a group of sub-energetic bursts, including the peculiar GRB980425 associated with the supernova SN1998bw (E(gamma) approximately 10(48) erg), has recently been identified. Here we report radio observations of GRB030329 that allow us to undertake calorimetry of the explosion. Our data require a two-component explosion: a narrow (5 degrees opening angle) ultra-relativistic component responsible for the gamma-rays and early afterglow, and a wide, mildly relativistic component that produces the radio and optical afterglow more than 1.5 days after the explosion. The total energy release, which is dominated by the wide component, is similar to that of other gamma-ray bursts, but the contribution of the gamma-rays is energetically minor. Given the firm link of GRB030329 with SN2003dh, our result indicates a common origin for cosmic explosions in which, for reasons not yet understood, the energy in the highest-velocity ejecta is extremely variable.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Nov
pubmed:issn
1476-4687
pubmed:author
pubmed:issnType
Electronic
pubmed:day
13
pubmed:volume
426
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
154-7
pubmed:year
2003
pubmed:articleTitle
A common origin for cosmic explosions inferred from calorimetry of GRB030329.
pubmed:affiliation
Caltech Optical Observatories 105-24, California Institute of Technology, Pasadena, California 91125, USA. ejb@astro.caltech.edu
pubmed:publicationType
Journal Article