Open AccessSpectral evolution of long gamma-ray bursts observed with Konus-Wind
Author(s) -
D. Svinkin,
Yu R. Temiraev,
D. Frederiks,
A. Tsvetkova,
M. Ulanov,
A. G. Demin
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1697/1/012003
Subject(s) - gamma ray burst , astrophysics , physics , flux (metallurgy) , spectral slope , spectral density , spectral analysis , power law , intensity (physics) , spectral shape analysis , correlation function (quantum field theory) , energy (signal processing) , spectral line , time evolution , spectral properties , function (biology) , phase (matter) , optics , astronomy , mathematics , materials science , spectroscopy , statistics , evolutionary biology , metallurgy , quantum mechanics , biology
We present a preliminary analysis of spectral evolution of 35 long bright gamma-ray bursts (GRBs) detected by Konus-Wind instrument. From the temporal and spectral analyses of the sample, we investigate the evolution of parameters of the smoothly joined broken power-law spectral model (the Band “GRB” function), in particular, we analyse hardness-intensity correlation within a burst. We show that the bulk of bursts exhibit E p ∝ F γ relation with the slope γ ∼ 0.3−0.5, where E p is the vF v spectrum peak energy and F is the energy flux; while a number of events have the smooth initial phase with strong spectral evolution with γ ≳ 1. Finally, we discuss derived the Band function parameters and their evolution pattern in the framework of GRB emission models.