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arXiv 1401.3573astro-ph.IMastro-ph.HE
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Gamma-Ray瞬变的Agile报警系统

The Agile Alert System For Gamma-Ray Transients

A. Bulgarelli, M. Trifoglio, F. Gianotti, M. Tavani, N. Parmiggiani, V. Fioretti, A. W. Chen, S. Vercellone, C. Pittori, F. Verrecchia, F. Lucarelli, P. Santola… 展开作者

A. Bulgarelli, M. Trifoglio, F. Gianotti, M. Tavani, N. Parmiggiani, V. Fioretti, A. W. Chen, S. Vercellone, C. Pittori, F. Verrecchia, F. Lucarelli, P. Santolamazza, G. Fanari, P. Giommi, D. Beneventano, A. Argan, A. Trois, E. Scalise, F. Longo, A. Pellizzoni, G. Pucella, S. Colafrancesco, V. Conforti, P. Tempesta, M. Cerone, P. Sabatini, G. Annoni, G. Valentini, L. Salotti

摘要:

近年来,新一代的空间飞行任务为高能天体物理学的发现提供了巨大的机会。在这篇文章中,我们专注于科学操作的伽马射线成像探测器(GRID)板载AGILE空间任务。AGILE-GRID在30 MeV-30 GeV的能量范围内灵敏,探测到了许多银河系和河外起源的伽马射线瞬变。这项工作提出了敏捷创新的方法来快速伽马射线瞬态检测,这是一项具有挑战性的任务,是敏捷科学计划的重要组成部分。目标是描述:(1)AGILE伽马射线警报系统,(2)在短处理时间内盲查识别瞬变的新算法,(3)伽马射线瞬变警报管理的AGILE程序,以及(4)评价试验后结果统计学显著性所需的比率检验的可能性。特殊的算法和优化的任务序列是必要的,以达到我们的目标。数据在每次轨道下行时由按不同时间尺度运行的警报管道自动分析。当超过适当的流量阈值时,自动生成警报并将其作为SMS消息发送到蜂窝电话、电子邮件以及智能手机和平板电脑的应用程序的推送通知。这些警报与两个管道的结果交叉检查,并执行手动分析。AGILE是一项小型科学级任务,其特点是优化科学分析和地面部分资源。该系统能够在数据下行后两到三小时内发出警报,这是伽马射线天体物理学中前所未有的反应时间。

英文摘要:

In recent years, a new generation of space missions offered great opportunities of discovery in high-energy astrophysics. In this article we focus on the scientific operations of the Gamma-Ray Imaging Detector (GRID) onboard the AGILE space mission. The AGILE-GRID, sensitive in the energy range of 30 MeV-30 GeV, has detected many gamma-ray transients of galactic and extragalactic origins. This work presents the AGILE innovative approach to fast gamma-ray transient detection, which is a challenging task and a crucial part of the AGILE scientific program. The goals are to describe: (1) the AGILE Gamma-Ray Alert System, (2) a new algorithm for blind search identification of transients within a short processing time, (3) the AGILE procedure for gamma-ray transient alert management, and (4) the likelihood of ratio tests that are necessary to evaluate the post-trial statistical significance of the results. Special algorithms and an optimized sequence of tasks are necessary to reach our goal. Data are automatically analyzed at every orbital downlink by an alert pipeline operating on different timescales. As proper flux thresholds are exceeded, alerts are automatically generated and sent as SMS messages to cellular telephones, e-mails, and push notifications of an application for smartphones and tablets. These alerts are crosschecked with the results of two pipelines, and a manual analysis is performed. Being a small scientific-class mission, AGILE is characterized by optimization of both scientific analysis and ground-segment resources. The system is capable of generating alerts within two to three hours of a data downlink, an unprecedented reaction time in gamma-ray astrophysics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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