Sky Brightness at Weihai Observatory of Shandong University

Sky Brightness at Weihai Observatory of Shandong University
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山东大学威海天文台天空亮度

DOI:
10.1086/676819
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发表时间:
2014-05
影响因子:
3.5
通讯作者:
Du Jun-Ju
Du Jun-Ju
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Guo Di-Fu;Hu Shao-Ming;Chen Xu;Gao Dong-Yang;Du Jun-Ju

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利用山东大学威海天文台1米光学望远镜2008 - 2012年161个夜晚的28000幅V、R波段影像,对天空亮度进行了测量。它们为我们提供了一个前所未有的数据库,可以用来研究天空亮度随天空位置、月光贡献和黄昏天空亮度的变化。最暗的天空亮度在V和R波段分别约为19.0和18.6等角秒-2。在WHO,前半夜有明显的变暗趋势,夏季变暗速率明显大于其他季节。天空亮度的变化更多地取决于方位角,而不是望远镜指向WHO的高度。结果表明,WHO的天空亮度受城市光的影响很大。
In this paper, a total of about 28000 images in V and R band obtained over 161 nights using the one-meter optical telescope at Weihai Observatory (WHO) of Shandong University from 2008 to 2012 have been processed to measure the sky brightness. They provide us with an unprecedented database, which can be used to study the variation of the sky brightness with the sky position, the moonlight contribution, and the twilight sky brightness. The darkest sky brightness is about 19.0 and 18.6 mag arcsec-2 in V and R band, respectively. An obvious darkening trend is found at the first half of the night at WHO, and the variation rate is much larger in summer than in other seasons. The sky brightness variation depends more on the azimuth than on the altitude of the telescope pointing for WHO. Our results indicate that the sky brightness at WHO is seriously influenced by urban light.
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