GRB 221009A: An ordinary nearby GRB with extraordinary observational properties

• DOI: 10.48550/arxiv.2303.10804
• Publication Date: 2023-01-01
• Authors: Lan Lin; He Gao; An Li; Shuo Xiao; Shunke Ai; Zong-Kai Peng; Long Li; Chen-Yu Wang; Nan Xu; Shijie Lin; Wei‐Hua Lei; Bing Zhang; Yan-Qiu Zhang; Chao Zheng; Jia-Cong Liu; W. C. Xue; Chen-Wei Wang; Wen-Jun Tan; S. L. Xiong
• Keywords: QB460-466; High Energy Astrophysical Phenomena (astro-ph.HE); 0103 physical sciences; FOS: Physical sciences; Gamma-ray bursts; Astrophysics; Astrophysics - High Energy Astrophysical Phenomena; 01 natural sciences

The gamma-ray burst GRB 221009A, known as the ``brightest-of-all-time" (BOAT), is closest energetic detected so far, with an energy of $E_{γ,\rm iso} \sim 10^{55}$ ergs. This study aims to assess its compatibility and luminosity distributions. Our analysis indicates that energy/luminosity function GRBs consistent across various redshift intervals, inclusion 221009A does not significantly impact at low redshifts. Additionally, our evaluation best-fitting result entire sample suggests expected number greater than $10^{55}$ ergs a 0.2, emergence functions within $\sim 2σ$ Poisson fluctuation error, still adhering principles small statistics. Furthermore, we find other bursts, defined \gtrsim10^{54} {\rm ergs}$, exhibit no significant differences in terms distributions $T_{90}$, minimum timescale, Amati relation, $E_{\rm γ,iso}$-$E_{\rm X,iso}$ $L_{γ,\rm iso}-Γ_0$ iso}-E_{\rm p,i}-Γ_0$ host galaxy properties, compared normal long GRBs. (including 221009A) likely have similar progenitor systems undergo dissipation radiation processes. generation may be due more extreme central engine properties or, likely, rarer viewing configuration quasi-universal structured jet.