Gamma‐Ray Burst Intensity Distributions
2004; IOP Publishing; Volume: 613; Issue: 1 Linguagem: Inglês
10.1086/422869
ISSN1538-4357
AutoresD. L. Band, J. P. Norris, J. T. Bonnell,
Tópico(s)Nuclear physics research studies
ResumoWe use the lag-luminosity relation to calculate self-consistently the redshifts, apparent peak bolometric luminosities LB, and isotropic energies Eiso for a large sample of BATSE gamma-ray bursts. We consider two different forms of the lag-luminosity relation; for both forms the median redshift for our burst database is 1.6. We model the resulting Eiso sample with power-law and Gaussian probability distributions without redshift evolution, both of which are reasonable models. The power-law model has an index of αE = 1.76 ± 0.05 (95% confidence), where p(Eiso) ∝ E. The simple universal jet profile model suggested but did not require αE = 2, and subsequent physically reasonable refinements to this model permit greater diversity in αE, as well as deviations from a power law; therefore, our observed Eiso probability distribution does not disprove the universal jet model.
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