标题： 费米-GBM团队对拉瓦西线的分析 显示英文标题

标题： Fermi-GBM Team Analysis on The Ravasio Line

摘要： 伽马射线暴的触发能谱已被证明在数十年的能量范围内遵循宽波段连续行为。 被赋予“史上最强”（BOAT）称号的GRB 221009A是有史以来观测到的最亮的伽马射线暴，并且是在半个世纪的观测中识别出的最亮的伽马射线暴，最初由费米伽马射线爆发监测器（GBM）发现。 代表费米-GBM团队，Lesage等人（2023年）描述了初始的GBM分析。 Ravasio等人（2024年）报告了在这次爆发的部分触发辐射中发现了一个光谱线，他们描述该光谱线在80秒内从$\sim$12 MeV演化到6 MeV。 我们报告了关于Ravasio线的GBM团队分析：1）我们无法确定可能导致此信号的仪器效应；2）我们计算该线统计显著性的方法表明它轻松超过了5$\sigma$发现阈值。 我们还评论了Zhang等人（2024年）报道的该线在更早时间间隔内的声称，最高可达37 MeV。 我们发现合理地利用这些测量来表征该线的演化是可行的，但需谨慎。 除非发现与GRB 221009A发射无关的任何严格的替代解释，否则我们鼓励理论研究探索这一新发现的伽马射线暴光谱特征。 显示英文摘要

摘要： The prompt spectra of gamma-ray bursts are known to follow broadband continuum behavior over decades in energy. GRB 221009A, given the moniker the brightest of all time (BOAT), is the brightest gamma-ray burst identified in half a century of observations, and was first identified by the Fermi Gamma-ray Burst Monitor (GBM). On behalf of the Fermi-GBM Team, Lesage et al. (2023) described the initial GBM analysis. Ravasio et al. (2024) report the identification of a spectral line in part of the prompt emission of this burst, which they describe as evolving over 80 s from $\sim$12 MeV to 6 MeV. We report a GBM Team analysis on the Ravasio Line: 1) We cannot identify an instrumental effect that could have produced this signal, and 2) our method of calculating the statistical significance of the line shows it easily exceeds the 5$\sigma$ discovery threshold. We additionally comment on the claim of the line beginning at earlier time intervals, up to 37 MeV, as reported in Zhang et al. (2024). We find that it is reasonable to utilize these measurements for characterization of the line evolution, with caution. We encourage theoretical studies exploring this newly discovered gamma-ray burst spectral feature, unless any rigorous alternative explanation unrelated to the emission from GRB 221009A is identified.