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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Organized Autotelescopes for Serendipitous Event Survey (OASES): Design and performance
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Organized Autotelescopes for Serendipitous Event Survey (OASES): Design and performance

机译：有组织的自动望远镜用于偶然事件调查（OASES）：设计和性能

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Organized Autotelescopes for Serendipitous Event Survey (OASES) is an optical observation project that aims to detect and investigate stellar occultation events by kilometer-sized trans-Neptunian objects (TNOs). In this project, multiple low-cost observation systems for wide-field and high-speed photometry were developed in order to detect rare and short-timescale stellar occultation events. The observation system consists of commercial off-the-shelf 0.28?m aperture f/1.58 optics providing a 2$${^{circ}_{.}}$$3 × 1$${^{circ}_{.}}$$8 field of view. A commercial CMOS camera is coupled to the optics to obtain full-frame imaging with a frame rate greater than 10?Hz. As of 2016 September, this project exploits two observation systems, which are installed on Miyako Island, Okinawa, Japan. Recent improvements in CMOS technology in terms of high-speed imaging and low readout noise mean that the observation systems are capable of monitoring ～2000 stars in the Galactic plane simultaneously with magnitudes down to V ～ 13.0, providing ～20% photometric precision in light curves with a sampling cadence of 15.4?Hz. This number of monitored stars is larger than for any other existing instruments for coordinated occultation surveys. In addition, a precise time synchronization method needed for simultaneous occultation detection is developed using faint meteors. The two OASES observation systems are executing coordinated monitoring observations of a dense stellar field in order to detect occultations by kilometer-sized TNOs for the first time.
机译：有组织的偶然事件自动望远镜（OASES）是一个光学观测项目，旨在通过千米大小的海王星天体（TNO）探测和调查恒星掩星事件。在该项目中，开发了多种低成本的广角和高速测光观测系统，以检测稀有和短时间的恒星掩星事件。该观测系统由商用的现成的0.28？m孔径f / 1.58光学器件组成，提供2 $$ {^ { circ} _ {。}} $$ 3×1 $$ {^ { circ} _ {。 }} $ 8美元的视野。将商用CMOS相机耦合到光学器件，以获得帧频大于10？Hz的全帧成像。截至2016年9月，该项目开发了两个观测系统，它们安装在日本冲绳县宫古岛。 CMOS技术在高速成像和低读出噪声方面的最新改进意味着观测系统能够同时监视星系平面中的约2000颗恒星，其幅度低至V〜13.0，可提供光曲线中约20％的光度精度采样率为15.4？Hz。受监视恒星的数量大于用于掩星观测的任何其他现有仪器。另外，利用微弱的流星开发了同时掩星探测所需的精确时间同步方法。这两个OASES观测系统正在执行对稠密恒星场的协调监测观测，以便首次检测出千米级TNO的掩星情况。

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