منابع مشابه
The Cross-Calibration of Swift-BAT and Fermi-GBM via Correlative Spectral Analysis of GRBs
We report on recent inter-calibration studies featuring Swift’s Burst Alert Telescope (BAT) and Fermi’s Gammaray Burst Monitor (GBM) based upon correlated observations of GRBs 080804 and 080810, via their resultant joint spectral analysis. Swift’s intrinsic multi-wavelength instrumentation and dynamical response complement Fermi’s superior energy range. The addition of BAT’s spectral response w...
متن کاملSpectral – Luminosity relation within individual Fermi GRBs
We study the spectra of all long Gamma Ray Bursts (GRBs) of known redshift detected by the Fermi satellite. Their fluxes and fluences are large enough to allow a time dependent study of their spectral characteristics in the 8 keV-1 MeV energy range. We find that the peak energy E peak of their EL(E) spectrum correlates with the luminosity in a remarkable tight way within individual bursts. This...
متن کاملFirst Light on GRBs with Fermi
Fermi LAT (Large Area Telescope) and GBM (Gamma ray Burst Monitor) observations of GRBs are briefly reviewed, keeping in mind EGRET expectations. Using γγ constraints on outflow Lorentz factors, leptonic models are pitted against hadronic models, and found to be energetically favored. Interpretation of the Fermi data on GRBs helps establish whether GRBs accelerate cosmic rays, including those r...
متن کاملFermi-Dirac Statistics
Fermi-Dirac statistics are one of two kinds of statistics exhibited by!identical quantum particles, the other being !Bose-Einstein statistics. Such particles are called fermions and bosons respectively (the terminology is due to Dirac [1902-1984] [1]). In the light of the !spin-statistics theorem, and consistent with observation, fermions are invariably spinors (of half-integral spin), whilst b...
متن کاملMultivariate Dispersive Ordering of Generalized Order Statistics
The concept of generalized order statistics (GOSs) was introduced as a unified approach to a variety of models of ordered random variables. The purpose of this paper is to investigate condi- tions on the underlying distribution functions and the parameters on which GOSs are based, to establish Shaked-Shanthikumar multivari- ate dispersive ordering of GOSs from one sample and Khaledi-Kochar mu...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2018
ISSN: 0004-6337
DOI: 10.1002/asna.201813504