厄里斯星自转的初步探测
Tentative Detection of the Rotation of Eris
摘要：
我们使用{ \it Swift}卫星对矮行星厄里斯进行了一系列连续多周的B波段光度测量。在低地球轨道上使用观测台比地面望远镜提供更好的时间取样。我们没有发现令人信服的证据，一个异常缓慢的旋转周期的几天，因为已经建议以前。在中等水平的统计置信度（$\sim$ 97%）下，略微检测到$\sim$ 1.08天的旋转周期。对$Swift$数据与\citet{2007AJ....133...26R}的地面B波段测量结果进行组合分析，得出相同的时间段（$\sim$ 1.08天），统计置信度略高（$\sim$ 99%）。
英文摘要：
We report a multi-week sequence of B-band photometric measurements of the dwarf planet Eris using the {\it Swift} satellite. The use of an observatory in low-Earth orbit provides better temporal sampling than is available with a ground-based telescope. We find no compelling evidence for an unusually slow rotation period of multiple days, as has been suggested previously. A $\sim$1.08 day rotation period is marginally detected at a modest level of statistical confidence ($\sim$97%). Analysis of the combination of the $Swift$ data with the ground-based B-band measurements of \citet{2007AJ....133...26R} returns the same period ($\sim$1.08 day) at a slightly higher statistical confidence ($\sim$99%).
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