论文标题
一种多级经验贝叶斯的方法,用于估计1366 BATSE目录长期伽马射线爆发的未知红移
A Multilevel Empirical Bayesian Approach to Estimating the Unknown Redshifts of 1366 BATSE Catalog Long-Duration Gamma-Ray Bursts
论文作者
论文摘要
我们提出了概率红移估计值的目录,以及1366个单独的长持续伽马射线爆发(LGRB),该脉冲和瞬态源实验(BATSE)检测到。该结果基于对红移的5维空间和四个固有的及时及时γ射线发射属性的仔细选择和对种群分布的仔细选择和建模:各向同性1024ms的峰值亮度,峰值的峰值亮度,集中的等向同时发射,光谱峰值以及固有的效果,以及固有的效果,并构成了效果的效果。蝙蝠。我们纯粹的概况方法是两个基本的合理假设:1。lgrbs跟踪,无论是宇宙之星的形成率和2。上述迅速伽马射线发射特性的联合4维分布都由多变量对数符号分布很好地描述。 我们的建模方法使我们能够将单个BATSE LGRB的红移限制在$ 0.36 $和0.96美元的平均不确定性范围内,分别为$ 50 \%$ $ $和$ 90 \%\%$ $置信度。我们的红移预测与先前通过提出的现象学高能关系计算得出的BATSE LGRB的红移估计值完全不一致,具体是,LGRBS峰亮度与光谱峰值能量,灯泡变异性和光谱lag的明显相关性。我们的预测与以前的作品之间观察到的差异可以通过探测器阈值和样品纳入在塑造文献中这些现象学高能相关性方面的强大影响来解释。
We present a catalog of the probabilistic redshift estimates and for 1366 individual Long-duration Gamma-Ray Bursts (LGRBs) detected by the Burst And Transient Source Experiment (BATSE). This result is based on a careful selection and modeling of the population distribution of 1366 BATSE LGRBs in the 5-dimensional space of redshift and the four intrinsic prompt gamma-ray emission properties: the isotropic 1024ms peak luminosity, the total isotropic emission, the spectral peak energy, as well as the intrinsic duration, while carefully taking into account the effects of sample incompleteness and the LGRB-detection mechanism of BATSE. Two fundamental plausible assumptions underlie our purely-probabilistic approach: 1. LGRBs trace, either exactly or closely, the Cosmic Star Formation Rate and 2. the joint 4-dimensional distribution of the aforementioned prompt gamma-ray emission properties is well-described by a multivariate log-normal distribution. Our modeling approach enables us to constrain the redshifts of individual BATSE LGRBs to within $0.36$ and $0.96$ average uncertainty ranges at $50\%$ and $90\%$ confidence levels, respectively. Our redshift predictions are completely at odds with the previous redshift estimates of BATSE LGRBs that were computed via the proposed phenomenological high-energy relations, specifically, the apparently-strong correlation of LGRBs' peak luminosity with the spectral peak energy, lightcurve variability, and the spectral lag. The observed discrepancies between our predictions and the previous works can be explained by the strong influence of detector threshold and sample-incompleteness in shaping these phenomenologically-proposed high-energy correlations in the literature.