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arXiv 2209.14844astro-ph.IMastro-ph.HEastro-ph.SR
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MAGIC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

Juan Cortina, V. A. Acciari, A. Biland, E. Colombo, C. da Costa, C. Delgado, C. Diaz, M. Fiori, D. Fink, T. Hassan, I. Jimenez-Martinez, E. Lyard, M. Mariotti, … 展开作者

Juan Cortina, V. A. Acciari, A. Biland, E. Colombo, C. da Costa, C. Delgado, C. Diaz, M. Fiori, D. Fink, T. Hassan, I. Jimenez-Martinez, E. Lyard, M. Mariotti, G. Martinez, R. Mirzoyan, G. Naletto, M. Polo, N. Produit, J. J. Rodriguez, T. Schweizer, R. Walter, C. W. Wunderlich, L. Zampieri, the MAGIC, LST collaborations

摘要:

这两台MAGIC 17米直径成像大气切伦科夫望远镜也可以作为一台强度干涉仪使用,它具有无死区、4通道、基于GPU的实时相关器。在大约之间的基线操作。40和90米的MAGIC干涉仪能够在400-440纳米波长范围内测量0.5-1质量的恒星直径,其灵敏度比20世纪70年代Narrabri恒星强度干涉仪的灵敏度高出约10倍。此外,主动镜像控制允许将主镜像拆分为子镜像。这使得可以同时进行零基线相关性的校准测量,或者同时收集17米以下几乎任意方向的六条基线,对应的角度尺度约为10米。1-50马斯我们计划在明年进行测试观测,增加附近的切伦科夫望远镜阵列(CTA)LST-1 23米直径望远镜。所有三对望远镜将同时进行关联。添加LST-1预计将增加灵敏度至少1 mag,并显着改善u-v平面覆盖。如果成功的话,所提出的相关器设置是可扩展的,足以实现完整的CTA阵列。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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