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Simultaneous observation of TeV time-variable objects and gamma-ray burst afterglows with an optical telescope

用光学望远镜同时观测TeV时变物体和伽马射线暴余辉

基本信息

批准号：
14540248
负责人：
MORI Masaki
金额：
$ 1.66万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540248/
关键词：
Gamma-ray objects Active galactic nuclei Gamma-ray burst CCD camera

项目摘要

We installed a small automated optical telescope system next to CANGAROO, an array of four imaging Cherenkov telescopes for very-high-energy gamma-ray observation in Woomera, South Australia, in collaboration of Japanese and Australian institutions. The main aim of this project is to monitor time-variable TeV objects, such as active galactic nuclei, and to execute follow-up observations of gamma-ray burst afterglows in optical waveband. Also this telescope can be used to monitor atmospheric condition which is important in Cherenkov observations by observing starlight extinction near the field-of-view of the Cherenkov observations.The system consists of a 30-cm diameter Schmidt-Cassegrain telescope (Meade LX200-30) and a cooled CCD camera (Apogee Ap-7p) controlled by a Linux-based computer via a network. It is equipped with an automated filter wheel with Johnson filters, thus enabling multiwavelength photometry. The observation hut has an automatic roof with use of motors which can be controlled by the computer. For automatic operation it includes various sensors such as a rain monitor which triggers automatic closing of the roof. We developed the software for all of these with help of collaborators. We succeeded in taking some test images with this system. This automated system has been under final tuning and testing in Woomera. With a continuous network connection, it can be used for follow-up observation of gamma-ray burst afterglows.

我们与日本和澳大利亚机构合作，在南澳大利亚伍默拉的 CANGAROO 旁边安装了一个小型自动光学望远镜系统，该系统由四个成像切伦科夫望远镜组成，用于甚高能伽马射线观测。该项目的主要目的是监测时变TeV天体，例如活动星系核，并对光波段的伽马射线爆发余辉进行后续观测。该望远镜还可用于监测切伦科夫观测中重要的大气状况，通过观察切伦科夫观测视场附近的星光消光。该系统由直径 30 厘米的施密特-卡塞格林望远镜 (Meade LX200-30) 和冷却 CCD 相机 (Apogee Ap-7p) 组成，由基于 Linux 的计算机通过网络。它配备了带有约翰逊滤光片的自动滤光轮，从而实现多波长光度测定。观察小屋有一个自动屋顶，使用可由计算机控制的电机。对于自动操作，它包括各种传感器，例如触发屋顶自动关闭的雨量监测器。我们在合作者的帮助下开发了所有这些软件。我们成功地用这个系统拍摄了一些测试图像。该自动化系统已在伍默拉进行最终调整和测试。通过连续的网络连接，可用于伽马射线爆发余辉的后续观测。