标题： MOA-2006-BLG-074：在行星微透镜中识别xallarap污染物 显示英文标题

标题： MOA-2006-BLG-074: recognizing xallarap contaminants in planetary microlensing

摘要： MOA-2006-BLG-074被选为MOA合作组回顾分析中最有希望的行星候选体之一：其不对称的高放大峰值可以通过一个天体穿过由小行星引起的中心奇点来完美解释。 然而，在对残差进行了详细分析后，我们意识到一个单一透镜和一个与暗伴星轨道运行的源提供了对所有观测到的偏离Paczynski曲线的偏差以及唯一物理上可接受的解释。 事实上，源的轨道运动受到足够的限制，使得可以从微透镜光变曲线中对双源进行非常精确的表征。 MOA-2006-BLG-074的情况表明，在任何试图通过微透镜调查获得准确行星人口统计的研究中，所谓的xallarap效应必须被认真对待。 显示英文摘要

摘要： MOA-2006-BLG-074 was selected as one of the most promising planetary candidates in a retrospective analysis of the MOA collaboration: its asymmetric high-magnification peak can be perfectly explained by a source passing across a central caustic deformed by a small planet. However, after a detailed analysis of the residuals, we have realized that a single lens and a source orbiting with a faint companion provides a more satisfactory explanation for all the observed deviations from a Paczynski curve and the only physically acceptable interpretation. Indeed the orbital motion of the source is constrained enough to allow a very good characterization of the binary source from the microlensing light curve. The case of MOA-2006-BLG-074 suggests that the so-called xallarap effect must be taken seriously in any attempts to obtain accurate planetary demographics from microlensing surveys.