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arXiv 1202.4747astro-ph.IM
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南部非洲CTA场地建议书

Southern Africa CTA Site Proposal

P. P. Krüger, D. J. Van der Walt

摘要:

南部非洲有一些世界上最好的切伦科夫望远镜的位置。南非只有一个可行的地点,位于萨瑟兰以南,也靠近南部非洲大型望远镜(SALT)。该网站有非常好的基础设施,很容易访问,但只有47%的夜间有一个无云的天空可供观察。已经拥有H.E.S.S望远镜的纳米比亚有许多潜在的地点,云层覆盖范围要小得多。H.E.S.S.该遗址海拔1840米,是这些遗址中最高的一个。64%的夜间无云。它也有非常低的夜空背景水平,并相对接近(约100公里)温得和克。从温得和克向南移动,云层覆盖和人造夜空亮度变得更小,Kuibis(Keetmanshoop和Luderitz之间)的站点位于海拔1640米。73%的时间都是晴朗的夜空。虽然这个地点似乎很遥远(距离温得和克公路660公里),但它靠近国家B4高速公路、铁路线、电力线和光纤线。它也是不到两个小时的车程,从港口和国家机场。纳米比亚的降雪量也很少,90%以上的时间风速低于50公里/小时,最大风速约为100公里/小时。整个南部非洲地区的地震非常稳定。

英文摘要:

Southern Africa has some of the world's best sites for air Cherenkov telescopes. South Africa has only one viable site, which is south of Sutherland and also close to the Southern African Large Telescope (SALT). This site has very good infrastructure and is easy to access, but only 47% of the night-time has a cloudless sky usable for observations. Namibia, which already hosts the H.E.S.S telescope, has a number of potential sites with much less cloud coverage. The H.E.S.S. site is one of the highest of these sites at 1840 m a.s.l. with about 64% of the night-time cloudless. It also has very low night sky background levels and is relatively close (about 100 km) to Windhoek. Moving further away from Windhoek to the south, the cloud coverage and artificial night sky brightness becomes even less, with the site at Kuibis (between Keetmanshoop and Luderitz) at 1640 m a.s.l. having clear night skies 73% of the time. Even though this site seems remote (being 660 km from Windhoek by road), it is close to the national B4 highway, a railway line, a power line and an optical fiber line. It is also less than two hours drive away from a harbour and national airports. The Namibian sites also receive very little snow, if any, and the wind speeds are less than 50 km/h for more than 90% of the time with maximum wind speeds of around 100 km/h. Seismically the whole Southern African region is very stable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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