论文标题
全球导航卫星系统伽玛射线突发探测器的拟议网络galileo g2
A proposed network of Gamma-ray Burst detectors on the Global Navigation Satellite System Galileo G2
论文作者
论文摘要
伽马射线爆发的准确定位仍然是至关重要的任务。尽管从历史上看,改进的定位导致了余辉发射的发现,并通过红移测量实现了它们的宇宙学分布,但最新的要求伴随着研究中子恒星合并的Kilonovae的潜力。预计重力波检测器将在未来十年内提供不超过10平方度的位置。随着对合并检测的地平线的增加,伽马射线和基洛诺瓦排放量的强度也使它们在大误差箱中的识别成为挑战。因此,通过伽马射线排放的本地化似乎是减轻此问题的最佳机会。在这里,我们建议将一些第二代伽利略卫星配备专用的GRB探测器。这节省了专用GRB网络的发射和卫星的成本,大轨道半径对三角测量有益,并且可以免费获得完美的位置和时机准确性。我们提出了三角剖分精度的模拟,表明像GRB 170817A一样微弱的短GRB可以定位为1度半径(1 Sigma)。
The accurate localization of gamma-ray bursts remains a crucial task. While historically, improved localization have led to the discovery of afterglow emission and the realization of their cosmological distribution via redshift measurements, a more recent requirement comes with the potential of studying the kilonovae of neutron star mergers. Gravitational wave detectors are expected to provide locations to not better than 10 square degrees over the next decade. With their increasing horizon for merger detections also the intensity of the gamma-ray and kilonova emission drops, making their identification in large error boxes a challenge. Thus, a localization via the gamma-ray emission seems to be the best chance to mitigate this problem. Here we propose to equip some of the second generation Galileo satellites with dedicated GRB detectors. This saves costs for launches and satellites for a dedicated GRB network, the large orbital radius is beneficial for triangulation, and perfect positional and timing accuracy come for free. We present simulations of the triangulation accuracy, demonstrating that short GRBs as faint as GRB 170817A can be localized to 1 degree radius (1 sigma).