Cosmology Based on the Extended Sky Suevey of Galaxies

1998年6月，SDSS的第一道曙光获得成功。确定了望远镜和CCD相机按初始设计进行了结构设计。SDSS日本推进小组（JPG）的成员进行了第一次光事件，JPG成员也参加了测试观测，并为CCD相机和主镜的完整设备进行了调试和测试。他们与美国合作者就新构建的器械及其在这几年构建期间的性能发表了几份技术报告。在SDSS的完成阶段，我们决定进入SDSS与SUBARU望远镜有效连接的新阶段。我们希望SDSS对新发现天体的详细观测和对编目星系的系统跟踪观测能在不久的将来顺利进行。特别是，为了获得相同质量水平的数据，使用通用设备非常重要。然后，我们派了几个JPG成员到夏威夷参加第一次光活动，并检查镶嵌CCD相机的工作是否稳定。这些结果为数据分析方法和装置的改进提供了有价值的基础数据。JPG成员在SUBARU的第一次光事件中发挥了重要作用，这些数据的分析将有助于构建新的仪器，将SDSS和SUBARU的结果有效地连接起来，这些产品将有效地发挥SDSS和SUBARU的最佳作用。

The First Light of SDSS has succeeded in the last June of 1998. It is confirmed that the telescope and CCD camera are constructed according as the initial design. The First Light events were performed by the menbers of SDSS Japan Promotion Group(JPG) and also JPG members have attended the test observations and worked for the tuning and test of CCD camera and the complete equipment of main mirror. They have published several Technical Reports with collaborators of the US with respect to newly constructed devices and their performances during these several constructing years. At the completion phase of SDSS, we decided to go a new stage that SDSS is effectively connected with SUBARU telescope. We hope that the detailed observations of new objects found by SDSS and the systematic follow-up observations of catalogued galaxies by SDSS should be done smoothly in near future. Especially, it is important to use common devices in order to get the same qualitative level of data. Then, we sent several JPG menbers to Hawaii at the First Light event and checked the whether the mosaic CCD camera works stably or not. From these results, we got the valuable fundamentaldata for the method of data analysisi and improvement of devices. The JPG menbers have played important roles in the First Light event of SUBARU.These data were analyzed for constructing new instruments which would efficintly connect the results of SDSS and SUBARU.These products will make effective the best use of SDSS and SUBARU.