论文标题
升级的Veritas恒星强度干涉仪（VSII）的性能
Performance of the upgraded VERITAS Stellar Intensity Interferometer (VSII)
论文作者
论文摘要
Veritas成像大气Cherenkov望远镜阵列（IACT）在2019年通过高速焦平面电子设备增强，以创建新的恒星强度干扰法（SII）观测能力（Veritas-SII或VSII）。 VSII在明亮的月球周期内运行，使用空闲望远镜时间在B光度带中提供高角度分辨率观测值（<1 MAS）。 VSII已经证明了使用相对较短（5小时）的暴露率在416 nm（BET CMA和EPS ORI）上测量<5％精度的两个B恒星的直径。最近改善了VSII仪器以提高仪器灵敏度和观察效率。本文描述了升级的VSII仪器，并记录了VSII敏感性的持续改善。该报告描述了VSII在将SII测量扩展到昏暗的恒星中的进展，并将VSII角直径测量分辨率提高到1％。
The VERITAS Imaging Atmospheric Cherenkov Telescope array (IACT) was augmented in 2019 with high-speed focal plane electronics to create a new Stellar Intensity Interferometry (SII) observational capability (VERITAS-SII, or VSII). VSII operates during bright moon periods, providing high angular resolution observations ( < 1 mas) in the B photometric band using idle telescope time. VSII has already demonstrated the ability to measure the diameters of two B stars at 416 nm (Bet CMa and Eps Ori) with < 5% accuracy using relatively short (5 hours) exposures. The VSII instrumentation was recently improved to increase instrumental sensitivity and observational efficiency. This paper describes the upgraded VSII instrumentation and documents the ongoing improvements in VSII sensitivity. The report describes VSII's progress in extending SII measurements to dimmer magnitude stars and improving the VSII angular diameter measurement resolution to better than 1%.
