SuperWASP-North太阳系外行星候选者在3小时< RA <6小时之间
SuperWASP-North Extra-solar Planet Candidates between 3hr < RA < 6hr
摘要：
广角行星搜索（WASP）通过光度测量方法调查了大量附近的恒星，以发现太阳系外行星系统的候选者，这是由于在< 5天的时间尺度上，"热彗星“的典型特征是小幅度的光变曲线下降。2004年4月至9月期间，SuperWASP-North仪器的观测产生了来自670万颗恒星的约13亿个数据点的丰富光度数据集。我们定制的数据采集和处理系统在V=13时可产生约0.02 mag的光度精度。我们提出了过渡候选人在03 h-06 h RA范围。在141，895条光变曲线中，有2688条光变曲线显示出统计上显著的类似凌日的周期性。其中，44个通过视觉检查的光变曲线，其中24个通过一组削减的统计意义的文物。考虑到现有星表中较高空间分辨率的先验信息，其余20个天体中除4个外均被删除。在剩下的四个候选目标中，一个被认为是后续观察的良好候选目标，另外还有三个第二优先目标。我们提供了这些候选人的详细信息，以及被淘汰的假阳性和天体物理假警报的选择，并简要讨论了采样对我们的结果的影响。
英文摘要：
The Wide Angle Search for Planets (WASP) photometrically surveys a large number of nearby stars to uncover candidate extrasolar planet systems by virtue of small-amplitude lightcurve dips on a < 5-day timescale typical of the ``Hot-Jupiters.'' Observations with the SuperWASP-North instrument between April and September 2004 produced a rich photometric dataset of some 1.3 billion datapoints from 6.7 million stars. Our custom-built data acquisition and processing system produces ~0.02 mag photometric precision at V=13. We present the transit-candidates in the 03h-06h RA range. Of 141,895 lightcurves with sufficient sampling to provide adequate coverage, 2688 show statistically significant transit-like periodicities. Of these, 44 pass visual inspection of the lightcurve, of which 24 are removed through a set of cuts on the statistical significance of artefacts. All but 4 of the remaining 20 objects are removed when prior information at higher spatial-resolution from existing catalogues is taken into account. Of the four candidates remaining, one is considered a good candidate for follow-up observations with three further second-priority targets. We provide detailed information on these candidates, as well as a selection of the false-positives and astrophysical false-alarms that were eliminated, and discuss briefly the impact of sampling on our results.
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