标题： 气球载编码掩模protoMIRAX实验的望远镜性能与图像模拟 显示英文标题

标题： Telescope performance and image simulations of the balloon-borne coded-mask protoMIRAX experiment

摘要： 在这项工作中，我们展示了通过使用 GEANT4 软件包为原型 MIRAX 硬 X 射线气球实验所进行的成像模拟结果。在模拟仪器背景时，我们考虑了各种辐射成分及其角依赖性，并且构建了实验的详细质量模型。我们模拟了气球在巴西飞行期间（纬度$\sim -23^{\circ}$，海拔$\sim 40 \thinspace$公里）子午线穿越蟹状星云和银河系中心区域的情况，并将对应的光谱作为输入引入到成像模拟中。我们展示了蟹状星云以及银河系中心区域三个源的图像：1E 1740.7-2942、GRS 1758-258 和 GX 1+4。结果显示，原型 MIRAX 实验能够对明亮的硬 X 射线源进行能谱和时间观测，同时也进行了重要的成像演示，这些都将有助于 MIRAX 卫星任务的设计。 显示英文摘要

摘要： In this work we present the results of imaging simulations performed with the help of the GEANT4 package for the protoMIRAX hard X-ray balloon experiment. The instrumental background was simulated taking into account the various radiation components and their angular dependence, as well as a detailed mass model of the experiment. We modeled the meridian transits of the Crab Nebula and the Galatic Centre region during balloon flights in Brazil ($\sim -23^{\circ}$ of latitude and an altitude of $\sim 40 \thinspace$ km) and introduced the correspondent spectra as inputs to the imaging simulations. We present images of the Crab and of three sources in the Galactic Centre region: 1E 1740.7-2942, GRS 1758-258 and GX 1+4. The results show that the protoMIRAX experiment is capable of making spectral and timing observations of bright hard X-ray sources as well as important imaging demonstrations that will contribute to the design of the MIRAX satellite mission.