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arXiv 2101.03084astro-ph.IMastro-ph.GAastro-ph.HEhep-ex
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POLAR-2:大规模伽玛暴偏振计gamma-ray

POLAR-2: a large scale gamma-ray polarimeter for GRBs

J. Hulsman, N. de Angelis, J. M. Burgess, F. Cadoux, J. Greinerd, M. Kole, H. Li, S. Mianowski, A. Pollo, N. Produit, D. Rybka, J. Stauffer, X. Wu, A. Zadrozny,… 展开作者

J. Hulsman, N. de Angelis, J. M. Burgess, F. Cadoux, J. Greinerd, M. Kole, H. Li, S. Mianowski, A. Pollo, N. Produit, D. Rybka, J. Stauffer, X. Wu, A. Zadrozny, S. N. Zhang, J. Sun, B. Wu

摘要:

伽玛暴的瞬时发射已经研究了50多年,但仍然知之甚少。通常,分析γ射线发射的光谱和时间剖面。然而,它们不足以对GRB相关的物理学进行完整的描述。偏振测量的加入为理解这些天体物理源提供了宝贵的信息。近年来,专门的旋光仪,如POLAR和GAP,被建造出来。前者观察到低水平的偏振以及偏振角的时间演变。据了解,一个更大的样本的伽玛射线暴偏振测量和时间分辨的研究是必要的,以约束理论模型。POLAR-2任务旨在通过将有效面积比POLAR增加一个数量级来解决这一问题。POLAR-2计划于2024年在中国空间站上发射,并将运行至少2年。POLAR的见解将有助于改进POLAR-2的总体设计。主要改进(与POLAR相比)将包括用SiPM取代多阳极PMT(MAPMT),增加敏感体积和进一步的技术升级。预计POLAR-2每年将测量约50个GRB,与POLAR最好的观测结果相比,质量相同或更好。将讨论该飞行任务的仪器设计、初步结果和预期的科学潜力。

英文摘要:

The prompt emission of GRBs has been investigated for more than 50 years but remains poorly understood. Commonly, spectral and temporal profiles of γ-ray emission are analysed. However, they are insufficient for a complete picture on GRB-related physics. The addition of polarization measurements provides invaluable information towards the understanding of these astrophysical sources. In recent years, dedicated polarimeters, such as POLAR and GAP, were built. The former of which observed low levels of polarization as well as a temporal evolution of the polarization angle. It was understood that a larger sample of GRB polarization measurements and time resolved studies are necessary to constrain theoretical models. The POLAR-2 mission aims to address this by increasing the effective area by an order of magnitude compared to POLAR. POLAR-2 is manifested for launch on board the China Space Station in 2024 and will operate for at least 2 years. Insight from POLAR will aid in the improvement of the overall POLAR-2 design. Major improvements (compared to POLAR) will include the replacement of multi-anode PMTs (MAPMTs) with SiPMs, increase in sensitive volume and further technological upgrades. POLAR-2 is projected to measure about 50 GRBs per year with equal or better quality compared to the best seen by POLAR. The instrument design, preliminary results and anticipated scientific potential of this mission will be discussed.

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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