Radio Observation in High Energy Astrophysics

在纳苏天文台，用1.4 GHz的球形碟阵探测到了射电瞬变源。这些发现在以下期刊中进行了调查。在X射线和伽马射线天文学以及光学天文学中，我们都有大视场的设备来探测瞬变物体。伽马射线暴就是一个例子。花了30多年的时间才明白它们是宇宙物体。在无线电波中，银河系平面上的瞬变源在七十年代初就已知。典型的一次是Cyg-X3，大约一年一次的大爆发。然而，直到2000年纳苏天文台开始观测之前，在银河系的高纬度地区都没有已知的射电瞬变。我们以极低的成本研制出了大型球形碟形阵列干涉仪。我们还开发了数字信号处理系统，以实现大视场搜索。结果，我们在银河系高纬度地区发现了几次射电瞬变。

In Nasu Observatory, Radio Transient Sources were discovered with spherical dish array at 1.4GHz. These discoveries were investigated in the following Journals. In X and Gamma-ray astronomy as well as in optical astronomy, we have facilities having large field of view to detect transient objects. One example was Gamma-ray Bursts. It took more than 30 years to understand they were cosmological objects. In radio waves, transient sources in Galactic plane were known in early seventies. Typical one was Cyg-X3, in which large outbursts were observed once a year or so. However, no radio transients was known at high Galactic latitudes until Nasu Observatory started observation in 2000. We have developed Large Spherical Dish Array Interferometer at very low cost. We also developed digital signal processing system to search large field of view. As a result, we found several radio transients at high Galactic latitudes.