The Educational Irish Research Satellite 1 (EIRSAT-1) is a 2U CubeSat being developed under ESA’s Fly Your Satellite! programme. The project has many aspects, which are primarily educational, but also include space qualification of new detector technologies for gamma-ray astronomy and the detection of gamma-ray bursts (GRBs). The Gamma-ray Module (GMOD), the main mission payload, is a small gamma-ray spectrometer comprising a 25 mm × 25 mm × 40 mm cerium bromide scintillator coupled to an array of 16 silicon photomultipliers. The readout is provided by IDE3380 (SIPHRA), a low-power and radiation tolerant readout ASIC. GMOD will detect gamma-rays and measure their energies in a range from tens of keV to a few MeV. Monte Carlo simulations were performed using the Medium Energy Gamma-ray Astronomy Library to evaluate GMOD’s capability for the detection of GRBs in low Earth orbit. The simulations used a detailed mass model of the full spacecraft derived from a very high-fidelity 3D CAD model. The sky-average effective area of GMOD on board EIRSAT-1 was found to be 10 cm² at 120 keV. The instrument is expected to detect between 11 and 14 GRBs, at a significance greater than 10σ (and up to 32 at 5σ), during a nominal one-year mission. The shape of the scintillator in GMOD results in omni-directional sensitivity which allows for a nearly all-sky field of view.

爱尔兰教育研究卫星 1 (EIRSAT-1) 是一个 2U CubeSat，由 ESA 的 Fly Your Satellite 开发！程序。该项目有许多方面，主要是教育，但也包括伽马射线天文学新探测器技术的空间认证和伽马射线爆发（GRB）的探测。主要任务有效载荷伽马射线模块 (GMOD) 是一个小型伽马射线光谱仪，包括一个 25 mm × 25 mm × 40 mm 溴化铈闪烁体，与 16 个硅光电倍增管阵列耦合。读数由 IDE3380 (SIPHRA) 提供，这是一种低功耗和耐辐射的读出 ASIC。GMOD 将探测伽马射线并测量其能量，范围从几十 keV 到几 MeV。蒙特卡罗模拟是使用中能伽马射线天文学库进行的，以评估 GMOD 在低地球轨道上探测 GRB 的能力。模拟使用了一个完整的航天器的详细质量模型，该模型源自一个非常高保真度的 3D CAD 模型。发现 EIRSAT-1 上 GMOD 的天空平均有效面积为 10 厘米²在 120 keV。在标称的一年任务期间，该仪器预计将探测到 11 到 14 个 GRB，显着性大于 10 σ （在 5 σ时最多可探测到 32 个）。GMOD 中闪烁体的形状导致全向灵敏度，允许几乎全天的视野。