Statistical Study of the Swift X-Ray Flash and X-Ray Rich Gamma-Ray Bursts

We build a comprehensive sample to statistically describe the properties of X-ray flashes (XRFs) and X-ray riches (XRRs) from the third Swift Burst Alert Telescope (BAT3) catalog of Gamma-ray bursts (GRBs). We obtain 81 XRFs, 540 XRRs, and 394 classical GRBs (C-GRBs). We statistically explore the di...

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Bibliographic Details
Published in:The Astrophysical journal 2018-10, Vol.866 (2), p.97
Main Authors: Bi, Xiongwei, Mao, Jirong, Liu, Chuanxi, Bai, Jin-Ming
Format: Article
Language:English
Subjects:
Astrophysics
Emission
Explosions
Galaxies
Galaxy distribution
Gamma ray bursts
Gamma rays
gamma rays: general
Luminosity
Properties (attributes)
radiation mechanisms: non-thermal
Red shift
Supernovae
X ray flashes
X-ray emissions
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Summary:We build a comprehensive sample to statistically describe the properties of X-ray flashes (XRFs) and X-ray riches (XRRs) from the third Swift Burst Alert Telescope (BAT3) catalog of Gamma-ray bursts (GRBs). We obtain 81 XRFs, 540 XRRs, and 394 classical GRBs (C-GRBs). We statistically explore the different properties of the γ-ray prompt emission, the X-ray emission, the X-ray light-curve type, the association with supernovae (SNe), and the host galaxy properties for these sources. We confirm that most XRFs/XRRs are long GRBs with low values of peak energy and they are low-luminosity GRBs. XRFs, XRRs, and C-GRBs follow the same EX,iso-Eγ,iso-Epeak,z correlations. Compared to the classical GRBs, XRFs are favorable to have the association with SN explosions. We do not find any significant differences of redshift distribution and host galaxy properties among XRFs, XRRs, and C-GRBs. We also discuss some observational biases and selection effects that may affect our statistical results. The GRB detectors with wide energy range and low energy threshold are expected for the XRF/XRR research in the future.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aadcf8