The Compton Spectrometer and Imager Project for MeV Astronomy

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021) Pub Date : 2021-09-21 DOI:10.22323/1.395.0652

J. Tomsick, S. Boggs, A. Zoglauer, E. Wulf, L. Mitchell, B. Phlips, C. Sleator, T. Brandt, A. Shih, Ja Roberts, P. Jean, P. Ballmoos, J. M. Oliveros, A. Smale, C. Kierans, D. Hartmann, M. Leising, M. Ajello, E. Burns, C. Fryer, P. Saint-Hilaire, J. Malzac, F. Tavecchio, V. Fioretti, A. Bulgarelli, G. Ghirlanda, Hsiang-Kuang Chang, Tadayuki Takahashi, K. Nakazawa, S. Matsumoto, Tom Melia, T. Siegert, A. Lowell, Hadar Lazar, J. Beechert, H. Gulick

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引用次数: 37

Abstract

The Compton Spectrometer and Imager (COSI) is a 0.2–5 MeV Compton telescope capable of imaging, spectroscopy, and polarimetry of astrophysical sources. Such capabilities are made possible by COSI’s germanium cross-strip detectors, which provide high efficiency, high resolution spectroscopy and precise 3D positioning of photon interactions. Science goals for COSI include studies of 0.511 MeV emission from antimatter annihilation in the Galaxy, mapping radioactive elements from nucleosynthesis, determining emission mechanisms and source geometries with polarization, and detecting and localizing multimessenger sources. The instantaneous field of view (FOV) for the germanium detectors is >25% of the sky, and they are surrounded on the sides and bottom by active shields, providing background rejection as well as allowing for detection of gamma-ray bursts or other gamma-ray flares over >50% of the sky. We have completed a Phase A concept study to consider COSI as a Small Explorer (SMEX) satellite mission, and here we discuss the advances COSI-SMEX provides for astrophysics in the MeV bandpass.

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用于MeV天文学的康普顿光谱仪和成像仪项目

康普顿光谱仪和成像仪(COSI)是一台0.2-5 MeV的康普顿望远镜，能够对天体物理源进行成像、光谱和偏振测量。这种能力是由COSI的锗交叉带探测器实现的，它提供高效率、高分辨率光谱和精确的光子相互作用3D定位。COSI的科学目标包括研究银河系中反物质湮灭产生的0.511 MeV辐射，绘制核合成中的放射性元素，利用极化确定发射机制和源几何形状，以及探测和定位多信使源。锗探测器的瞬时视场(FOV) >占天空的25%，它们的侧面和底部被主动屏蔽包围，提供背景抑制，以及允许在>50%的天空中探测伽马射线爆发或其他伽马射线耀斑。我们已经完成了将COSI作为小型探测器(SMEX)卫星任务的a阶段概念研究，在这里我们讨论了COSI-SMEX为MeV带通天体物理学提供的进展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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