行星Transit巡天中的观测窗口函数
Observational Window Functions in Planet Transit Surveys
摘要：
现有的行星凌日在数据中被探测到的概率敏感地依赖于观测的窗口函数。我们定量表征和提供可视化的依赖这种概率作为轨道周期的函数后，几个观测策略和天体物理参数，如观测运行的长度，观测节奏，夜间长度，过境持续时间和深度，以及采样过境的最小数量。探测凌日的能力与观测的内在噪声直接相关。在我们的观测窗口函数的模拟中，我们明确地解决非相关（高斯或白）噪声和相关（红）噪声，并讨论这两个噪声分量如何影响过境检测从根本上不同的方式，特别是对于长时间和/或小过境深度。我们还讨论了过境可探测性的竞争效应的后果，详细说明观测策略的措施，并检查不同的过境调查方案的预测效率相对于某些区域的参数空间。
英文摘要：
The probability that an existing planetary transit is detectable in one's data is sensitively dependent upon the window function of the observations. We quantitatively characterize and provide visualizations of the dependence of this probability as a function of orbital period upon several observing strategy and astrophysical parameters, such as length of observing run, observing cadence, length of night, transit duration and depth, and the minimum number of sampled transits. The ability to detect a transit is directly related to the intrinsic noise of the observations. In our simulations of observational window functions, we explicitly address non-correlated (gaussian or white) noise and correlated (red) noise and discuss how these two noise components affect transit detectability in fundamentally different manners, especially for long periods and/or small transit depths. We furthermore discuss the consequence of competing effects on transit detectability, elaborate on measures of observing strategies, and examine the projected efficiency of different transit survey scenarios with respect to certain regions of parameter space.
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