开启硬X/软gamma-ray聚焦之路：ASTENA-探路者任务
Opening the path to hard X-/soft gamma-ray focussing: the ASTENA-pathfinder mission
摘要：
硬X射线/软伽马射线天文学是瞬变、核和多信使天体物理学的一个重要领域。然而，空间定位，成像能力和灵敏度的测量是非常有限的能量范围> 70 keV。为了克服这些限制，我们提出了一个任务概念，ASTENA，提交给欧空局的计划航行2050。我们将报告ASTENA的开拓者，我们打算向意大利航天局提出建议，作为一个有国际参与的意大利特派团。它将基于ASTENA上的两台仪器之一：焦距为20 m的劳厄透镜，能够将50-700 keV通带中的硬X射线聚焦到3D位置敏感焦平面光谱仪中。透镜的聚焦特性和探测器的定位特性相结合，将提供无与伦比的成像和光谱能力，从而能够研究诸如伽马射线暴余辉、超新星爆炸、正电子湮灭线等现象。
英文摘要：
Hard X-/soft gamma-ray astronomy is a crucial field for transient, nuclear and multimessenger astrophysics. However, the spatial localization, imaging capabilities and sensitivity of the measurements are strongly limited for the energy range > 70 keV. To overcome these limitations, we have proposed a mission concept, ASTENA, submitted to ESA for its program Voyage 2050. We will report on a pathfinder of ASTENA, that we intend to propose to ASI as an Italian mission with international participation. It will be based on one of the two instruments aboard ASTENA: a Laue lens with 20 m focal length, able to focus hard X-rays in the 50-700 keV passband into a 3-d position sensitive focal plane spectrometer. The combination of the focussing properties of the lens and of the localization properties of the detector will provide unparalleled imaging and spectroscopic capabilities, thus enabling studies of phenomena such as gamma-ray bursts afterglows, supernova explosions, positron annihilation lines and many more.
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