We have realised a simple prototype system to perform searches for short timescale optical transients, utilising the novel drift scan imaging technique described by Tingay (2020). We used two coordinated and aligned cameras, with an overlap field of view of approximately 3.7 deg $^2$ , to capture over $34\,000 \times 5$ second images during approximately 24 h of observing. The system is sensitive to optical transients, due to an effective exposure time per pixel of 21 ms, brighter than a V magnitude of 6.6. In our 89.7 deg $^2$ h of observations, we find no candidate astronomical transients, giving an upper limit to the rate of these transients of 0.8 per deg $^2$ per day, competitive with other experiments of this type. The system is triggered by reflections from satellites and various instrumental effects, which are easily identifiable due to the two camera system. The next step in the development of this promising technique is to move to a system with larger apertures and wider fields of view.

中文翻译：

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使用漂移扫描成像 II 的高节奏光学瞬态搜索：持续时间 <21 ms 和幅度 <6.6 的光学瞬态的事件率上限

我们利用 Tingay (2020) 描述的新型漂移扫描成像技术，实现了一个简单的原型系统来搜索短时间尺度的光学瞬变。我们使用了两个协调和对齐的相机，重叠视野约为 3.7 度 $^2$ , 捕获 $34\,000 \乘以 5$ 在大约 24 小时的观察期间的第二张图像。该系统对光学瞬变很敏感，因为每个像素的有效曝光时间为 21 毫秒，比五6.6 级。在我们的 89.7 度 $^2$ h 的观察，我们没有发现候选的天文瞬变，给这些瞬变速率的上限 0.8 每度 $^2$ 每天，与其他此类实验竞争。该系统由卫星反射和各种仪器效果触发，由于两个摄像头系统，这些效果很容易识别。开发这种有前途的技术的下一步是转向具有更大孔径和更宽视野的系统。