论文标题
魔术强度干涉仪的首次测量和升级计划
First measurements and upgrade plans of the MAGIC intensity interferometer
论文作者
论文摘要
两个魔术直径17米的成像大气Cherenkov望远镜也配备了功能，还可以作为强度干涉仪，具有无死时间，4频道，基于GPU的实时相关器。用基线在大约之间运行。 40和90 m的魔术干涉仪能够在400-440 nm波长范围内测量0.5-1 MAS的恒星直径，其灵敏度比Narrabri Stellar stellar强度干涉仪的敏感性大约好10倍。此外，主动的镜像控制允许将主镜子拆分为子镜头。这允许对零基线相关性进行同时进行校准测量，或者同时收集以下几乎任意取向的17 m以下的六个基准，对应于大约的角度尺度。 1-50 MAS。我们计划执行测试观察结果，并在明年之前添加附近的Cherenkov望远镜阵列（CTA）LST-1 23 m直径望远镜。这三个望远镜对将同时相关。添加LST-1有望将灵敏度提高至少1个MAG，并显着改善U-V平面覆盖率。如果成功，则建议的相关设置足以扩展到完整的CTA数组。
The two MAGIC 17-m diameter Imaging Atmospheric Cherenkov Telescopes have been equipped to work also as an intensity interferometer with a deadtime-free, 4-channel, GPU-based, real-time correlator. Operating with baselines between approx. 40 and 90 m the MAGIC interferometer is able to measure stellar diameters of 0.5-1 mas in the 400-440 nm wavelength range with a sensitivity roughly 10 times better than that achieved in the 1970s by the Narrabri Stellar Intensity Interferometer. Besides, active mirror control allows to split the primary mirrors into sub-mirrors. This allows to make simultaneous calibration measurements of the zero-baseline correlation or to simultaneously collect six baselines below 17 m with almost arbitrary orientation, corresponding to angular scales of approx. 1-50 mas. We plan to perform test observations adding the nearby Cherenkov Telescope Array (CTA) LST-1 23 m diameter telescope by next year. All three telescope pairs will be correlated simultaneously. Adding LST-1 is expected to increase the sensitivity by at least 1 mag and significantly improve the u-v plane coverage. If successful, the proposed correlator setup is scalable enough to be implemented to the full CTA arrays.
