礼品:一颗6U立方体卫星,用于探测和定位伽马射线暴

IF 2.2 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Alexey Uliyanov, Cuán de Barra, David Murphy, Derek O’Callaghan, Padraig McDermott, Joseph Thompson, Lorraine Hanlon, Sheila McBreen
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引用次数: 0

摘要

gift是一颗6U立方体卫星,设计用于探测和定位伽马射线暴(GRBs)。它的主要目标是提高现有GRB天文台的天空覆盖范围,并为寻找引力波事件的电磁对应体做出贡献。gift将使用六个CeBr \( _3 \)闪烁体探测器,以不同的角度定向,根据观测到的计数率的差异来定位grb。每个探测器采用24个sipm阵列进行闪烁体读出。建立了一个全尺寸的gift探测器原型,并对能量从31 keV到1.3 MeV的伽马射线进行了测试。它的能量分辨率为5.4% at 662 keV. Monte-Carlo simulations were used to estimate the GRB detection and localisation performance of the full instrument. GIFTS was able to detect about 50% of the GRBs from the Fermi GBM catalogue, provided they were not occulted by Earth. Assuming a 60% duty factor for GRB observations, GIFTS is expected to detect about 80 GRBs/year including 12 short GRBs/year. For 90% of the detected GRBs with positive elevations, the true localisation error is less than 32\( ^{\circ } \). The localisation error is mainly defined by statistical fluctuations in the observed count rates and becomes smaller for brighter events. Systematic localisation errors are expected to depend mainly on the accuracy of the instrument response model used by the localisation procedure. GIFTS is under development and expected to be launch ready for the next gravitational-wave observing run (O5).
本文章由计算机程序翻译,如有差异,请以英文原文为准。
GIFTS: A 6U CubeSat for the detection and localisation of gamma-ray bursts

GIFTS is a 6U CubeSat designed to detect and localise gamma-ray bursts (GRBs). Its main goal is to improve the sky coverage of existing GRB observatories and contribute to the search of electromagnetic counterparts to gravitational-wave events. GIFTS will use six CeBr\( _3 \) scintillator detectors oriented at different angles to localise GRBs based on the difference in the observed count rates. Each detector employs an array of 24 SiPMs for scintillator readout. A full-size prototype of one GIFTS detector was built and tested with gamma rays with energies ranging from 31 keV to 1.3 MeV. It showed an energy resolution of 5.4% at 662 keV. Monte-Carlo simulations were used to estimate the GRB detection and localisation performance of the full instrument. GIFTS was able to detect about 50% of the GRBs from the Fermi GBM catalogue, provided they were not occulted by Earth. Assuming a 60% duty factor for GRB observations, GIFTS is expected to detect about 80 GRBs/year including 12 short GRBs/year. For 90% of the detected GRBs with positive elevations, the true localisation error is less than 32\( ^{\circ } \). The localisation error is mainly defined by statistical fluctuations in the observed count rates and becomes smaller for brighter events. Systematic localisation errors are expected to depend mainly on the accuracy of the instrument response model used by the localisation procedure. GIFTS is under development and expected to be launch ready for the next gravitational-wave observing run (O5).

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来源期刊
Experimental Astronomy
Experimental Astronomy 地学天文-天文与天体物理
CiteScore
5.30
自引率
3.30%
发文量
57
审稿时长
6-12 weeks
期刊介绍: Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.
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