Poisson-FOCuS: An Efficient Online Method for Detecting Count Bursts with Application to Gamma Ray Burst Detection
成果类型：
Article
署名作者：
Ward, Kes; Dilillo, Giuseppe; Eckley, Idris; Fearnhead, Paul
署名单位：
Lancaster University; Istituto Nazionale Astrofisica (INAF); University of Udine; Lancaster University
刊物名称：
JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
ISSN/ISSBN：
0162-1459
DOI：
10.1080/01621459.2023.2235059
发表日期：
2025
页码：
7-19
关键词：
摘要：
Gamma ray bursts are flashes of light from distant, new-born black holes. CubeSats that monitor high-energy photons across different energy bands are used to detect these bursts. There is a need for computationally efficient algorithms, able to run using the limited computational resource onboard a CubeSats, that can detect when gamma ray bursts occur. Current algorithms are based on monitoring photon counts across a grid of different sizes of time window. We propose a new method, which extends the recently proposed FOCuS approach for online change detection to Poisson data. Our method is mathematically equivalent to searching over all possible window sizes, but at half the computational cost of the current grid-based methods. We demonstrate the additional power of our approach using simulations and data drawn from the Fermi gamma ray burst monitor archive. Supplementary materials for this article are available online.