Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model
نویسندگان
چکیده
منابع مشابه
Peak Energy–Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model
Using a simple uniform jet model of prompt emissions of gamma-ray bursts (GRBs), we reproduce the observed peak energy–isotropic energy relation. A Monte Carlo simulation shows that the low isotropic energy part of the relation is dominated by events viewed from off-axis directions, and the number of the off-axis events is about one-third of the on-axis emissions. We also compute the observed e...
متن کاملExtremely Low Isotropic Gamma Ray Energy and the Low Peak Energy of GRB 980425 in the off - axis jet model with the intrinsically high peak energy
Using a simple off-axis jet model of GRBs, we can reproduce the observed unusual properties of the prompt emission of GRB 980425, such as the extremely low isotropic equivalent γ-ray energy, the low peak energy, the high fluence ratio, and the long spectral lag when the jet with the standard energy of ∼ 10 ergs and the opening half-angle of 10 . ∆θ . 30 is seen from the off-axis viewing angle θ...
متن کاملGamma-ray Burst Peak Duration as a Function of Energy
Gamma-ray burst time histories often consist of many peaks. These peaks tend to be narrower at higher energy. If gamma-ray bursts are cos-mological, the energy dependence of gamma-ray burst time scales must be understood in order to correct the time scale dependence due to the expansion of the universe. By using the average autocorrelation function and the average pulse width, we show that the ...
متن کاملOutliers to the Isotropic Energy - Peak Energy Relation in GRBs
The peak energy isotropic energy (EpEi) relation is among the most intriguing recent discoveries concerning GRBs. It can have numerous implications on our understanding of the emission mechanism of the bursts and on the application of GRBs for cosmological studies. However, this relation was verified only for a small sample of bursts with measured redshifts. We propose here a test whether a bur...
متن کاملTesting the Gamma-Ray Burst Energy Relationships
Building on Nakar & Piran’s analysis of the Amati relation relating gammaray burst peak energies Ep and isotropic energies Eiso, we test the consistency of a large sample of BATSE bursts with the Amati and Ghirlanda (which relates peak energies and actual gamma-ray energies Eγ) relations. Each of these relations can be expressed as a ratio of the different energies that is a function of redshif...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2004
ISSN: 0004-637X,1538-4357
DOI: 10.1086/421084