SPECKLE CAMERA OBSERVATIONS FOR THE NASA KEPLER MISSION FOLLOW-UP PROGRAM
SPECKLE CAMERA OBSERVATIONS FOR THE NASA KEPLER MISSION FOLLOW-UP PROGRAM
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NASA 开普勒任务后续计划的散斑相机观测
DOI：
10.1088/0004-6256/142/1/19
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
D. Ciardi
中科院分区：
文献类型：
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作者：
S. Howell;M. Everett;W. Sherry;E. Horch;D. Ciardi
我们展示了对开普勒任务发现的被分类为候选系外行星主星的恒星进行散斑成像调查的第一个结果。我们使用散斑成像来寻找微弱的伴星或紧密排列的背景恒星，这些恒星可以为其较亮邻居的开普勒光曲线贡献通量。预计背景恒星将对开普勒任务发现的假阳性候选凌日系外行星库做出重大贡献，特别是在微弱的邻居正在遮蔽双星的情况下。在这里，我们描述了我们的开普勒后续观测计划、所使用的散斑成像相机、我们的数据缩减以及天体测量和光度测量性能。开普勒恒星的范围从 R = 8 到 16，我们的观测试图提供背景非探测极限 5-6 星等较弱和二元分离 ∼0.05-2.0 角秒。我们提供的数据描述了二次源的相对亮度、间隔和位置角度，以及未检测到 156 颗目标恒星周围微弱邻近恒星的相对板限制。在 10 颗恒星附近发现了微弱的邻居。
We present the first results from a speckle imaging survey of stars classified as candidate exoplanet host stars discovered by the Kepler mission. We use speckle imaging to search for faint companions or closely aligned background stars that could contribute flux to the Kepler light curves of their brighter neighbors. Background stars are expected to contribute significantly to the pool of false positive candidate transiting exoplanets discovered by the Kepler mission, especially in the case that the faint neighbors are eclipsing binary stars. Here, we describe our Kepler follow-up observing program, the speckle imaging camera used, our data reduction, and astrometric and photometric performance. Kepler stars range from R = 8 to 16 and our observations attempt to provide background non-detection limits 5–6 mag fainter and binary separations of ∼0.05–2.0 arcsec. We present data describing the relative brightness, separation, and position angles for secondary sources, as well as relative plate limits for non-detection of faint nearby stars around each of 156 target stars. Faint neighbors were found near 10 of the stars.