论文标题
TIRCAM2近红外成像仪在Devasthal 3.6-m望远镜上使用TiRCAM2近红外成像仪结果
First Lunar Occultation Results with the TIRCAM2 Near-Infrared Imager at the Devasthal 3.6-m Telescope
论文作者
论文摘要
TiRCAM2是印度北部Devasthal 3.6 m望远镜的设施近红外成像仪，配备了Aladdin III INSB阵列探测器。我们已经开创了TiRCAM2用于非常快的光度法的使用，目的是记录月球掩体（LO）。现在，此模式已运行并公开提供。在本文中，我们描述了相关的仪器细节，我们提供了对LO方法和基础数据分析程序的参考，并列出了到目前为止记录的LO事件。在结果中，我们重点介绍了一些导致一个小分离二进制恒星和两个恒星角直径的测量。最后，我们对进一步可能的工具发展和科学回报的估计进行了简短的看法。特别是，我们发现LO技术可以在点望远镜上检测到snr = 1的源源。大于〜1 milliarcsecond（MAS）的角直径可以用SNR高于10或K〜6 mag进行测量。这些数字只是一个指示，将在很大程度上取决于诸如月相和月球肢体运动速率之类的条件。仅根据统计数据，每年都有数千个LO事件，每年都可以观察到具有给定的望远镜和工具。
TIRCAM2 is the facility near-infrared Imager at the Devasthal 3.6-m telescope in northern India, equipped with an Aladdin III InSb array detector. We have pioneered the use of TIRCAM2 for very fast photometry, with the aim of recording Lunar Occultations (LO). This mode is now operational and publicly offered. In this paper we describe the relevant instrumental details, we provide references to the LO method and the underlying data analysis procedures, and we list the LO events recorded so far. Among the results, we highlight a few which have led to the measurement of one small-separation binary star and of two stellar angular diameters. We conclude with a brief outlook on further possible instrumental developments and an estimate of the scientific return. In particular, we find that the LO technique can detect sources down to K~ 9 mag with SNR=1 on the DOT telescope. Angular diameters larger than ~ 1 milliarcsecond (mas) could be measured with SNR above 10, or K~6 mag. These numbers are only an indication and will depend strongly on observing conditions such as lunar phase and rate of lunar limb motion. Based on statistics alone, there are several thousands LO events observable in principle with the given telescope and instrument every year.
