Light Curves For M4 Millimagnitude Rr Lyrae (Mmrr)

Included are files with light curve (measured brightness over time) data, about 80 days' worth, for three stars in the globular cluster M4 that exhibit millimagnitude level, RR Lyrae-like variability. The data are derived from images taken by NASA's Kepler/K2 mission. The enclosed README provides details on the data contained in the files. The variability shown by these stars has not been seen in similar kinds of stars before, and represents a new class of stellar variability as far as we have been able to determine.本数据集包含球状星团M4中三颗恒星的光变曲线（light curve，即随时间记录的亮度变化）数据，时长约80天。这些恒星呈现毫星等（millimagnitude）级别的类天琴座RR型变星（RR Lyrae）变异性。该数据集的数据源自美国国家航空航天局（NASA）开普勒/K2任务拍摄的观测图像。随附的README文件将详细说明各数据文件所包含的具体内容。据我们目前所能确定的范围来看，这类恒星所呈现的变异性此前从未在同类恒星中被观测到，其代表了一种全新的恒星变异性类别。