z '-BAND GROUND-BASED DETECTION OF THE SECONDARY ECLIPSE OF WASP-19b
z '-BAND GROUND-BASED DETECTION OF THE SECONDARY ECLIPSE OF WASP-19b
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WASP-19b 二次日食的 z 波段地基探测
DOI：
10.1088/0067-0049/201/2/36
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Burton J
中科院分区：
文献类型：
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作者：
Burton J
我们提出了基于地面的探测凌日系外行星WASP-19 b的二次日食。这些观测是使用安装在新技术望远镜上的ULTRACAM三光束CCD相机在斯隆z波段进行的。测量结果显示日食深度为0.088%±0.019%，与之前基于H和K波段测量的预测相匹配。我们详细讨论了我们的方法，以消除由于数据集的系统性所产生的错误，除了拟合模型过境我们的数据。这个拟合返回了一个食中心，T0，2455578.7676 HJD，与圆形轨道一致。我们的二次日食深度的测量也进行了比较，模型大气的WASP-19 b，并发现与以前的测量在较长的波长的模型大气，我们调查是一致的。
We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z'band using the ULTRACAM triple-beam CCD camera mounted on the New Technology Telescope. The measurement shows a 0.088%±0.019% eclipse depth, matching previous predictions based on H-and K-band measurements. We discuss in detail our approach to the removal of errors arising due to systematics in the data set, in addition to fitting a model transit to our data. This fit returns an eclipse center, T 0, of 2455578.7676 HJD, consistent with a circular orbit. Our measurement of the secondary eclipse depth is also compared to model atmospheres of WASP-19b and is found to be consistent with previous measurements at longer wavelengths for the model atmospheres we investigated.