MACHETE：一台transit成像大气切伦科夫望远镜，用于观测半个甚高能$γ$射线天空
MACHETE: A transit Imaging Atmospheric Cherenkov Telescope to survey half of the Very High Energy $γ$-ray sky
摘要：
目前用于甚高能$γ$射线天体物理学的成像大气切伦科夫望远镜是视场高达几十平方度的指向仪器。我们建议建立一个阵列的两个非转向（漂移）望远镜。每个望远镜将有一个相机与5 $\times$ 60平方度的视场定向沿子午线。一年中大约有一半的天空会经过这个视野。我们已经进行了蒙特卡洛模拟，以估计该仪器的性能。我们期望它能以$\sim$ 0.77%的积分通量灵敏度，$\sim$ 150 GeV的分析能量阈值和$\sim$ 0.1 $^{\circ}$的角分辨率来观测这半边天。对于在特定夜晚经过望远镜的天文物体，我们可以在一个夜晚达到蟹状星云通量的12%的积分灵敏度，这使得它成为一个非常强大的工具，可以使用可操纵的IACT或其他波长的仪器来触发对可变源的进一步观测。
英文摘要：
Current Imaging Atmospheric Cherenkov Telescopes for Very High Energy $γ$-ray astrophysics are pointing instruments with a Field of View up to a few tens of sq deg. We propose to build an array of two non-steerable (drift) telescopes. Each of the telescopes would have a camera with a FOV of 5$\times$60 sq deg oriented along the meridian. About half of the sky drifts through this FOV in a year. We have performed a Montecarlo simulation to estimate the performance of this instrument. We expect it to survey this half of the sky with an integral flux sensitivity of $\sim$0.77\% of the steady flux of the Crab Nebula in 5 years, an analysis energy threshold of $\sim$150 GeV and an angular resolution of $\sim$0.1$^{\circ}$. For astronomical objects that transit over the telescope for a specific night, we can achieve an integral sensitivity of 12\% of the Crab Nebula flux in a night, making it a very powerful tool to trigger further observations of variable sources using steerable IACTs or instruments at other wavelengths.
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