Measurement of Atmospheric Scintillation during a Period of Saharan Dust (Calima) at Observatorio del Teide, Iz̃ana, Tenerife, and the Impact on Photometric Exposure Times
Measurement of Atmospheric Scintillation during a Period of Saharan Dust (Calima) at Observatorio del Teide, Iz̃ana, Tenerife, and the Impact on Photometric Exposure Times
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特内里费岛伊萨纳泰德天文台在撒哈拉沙尘 (Calima) 期间的大气闪烁测量及其对光度曝光时间的影响
DOI：
10.1088/1538-3873/ab6753
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发表时间：
2019
影响因子：
3.5
通讯作者：
Alexander D. Deev
中科院分区：
文献类型：
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作者：
Ov Vikhireva;S. A. Shalnova;Alexander D. Deev
我们提出了在2017年9月为期一周的时间内在特内里费岛伊萨尼亚的Observatorio del Teide捕获的闪烁噪声剖面。来自伯明翰太阳振荡网络（野牛）和恒星活动（STELLA）机器人望远镜的同期数据提供了每日大气消光的估计，允许将闪烁噪声置于整体大气条件的背景下。我们讨论的结果都在野牛分光光度计设计的影响，更普遍的天文观测。我们发现，闪烁噪声功率减少了一半，在约5赫兹，并减少到十分之一之间的20和30赫兹，即使在温和的卡利马期间，能见度降低，由于高浓度的矿物粉尘在大气中。我们表明，通常接受的曝光时间<10 ms，限制闪烁噪声的影响，在地基测光可能会增加，并根据应用程序，可能没有什么好处，以实现曝光时间短于50 ms，放松对探测器增益和带宽的限制。
We present scintillation noise profiles captured at the Observatorio del Teide, Izaña, Tenerife, over a one-week period in 2017 September. Contemporaneous data from the Birmingham Solar Oscillations Network (BiSON) and the Stellar Activity (STELLA) robotic telescopes provides estimates of daily atmospheric extinction allowing the scintillation noise to be placed within the context of overall atmospheric conditions. We discuss the results both in terms of the impact on BiSON spectrophotometer design, and for astronomical observations more generally. We find that scintillation noise power reduces by half at about 5 Hz, and is reduced to one tenth between 20 and 30 Hz even during periods of mild Calima, where visibility is reduced due to high concentrations of mineral dust in the atmosphere. We show that the common accepted exposure time of <10 ms for limiting the effect of scintillation noise in ground based photometry may be increased, and that depending on the application there may be little benefit to achieving exposure times shorter than 50 ms, relaxing constraints on detector gain and bandwidth.