M31 Cepheid disk sample of 1st year of PS1

We present a sample of Cepheid variable stars towards M31 based on the first year of regular M31 observations of the PS1 survey in the r_P1 and i_P1 filters. We describe the...本文基于PS1（Pan-STARRS 1，泛星计划1号）巡天对M31（仙女座星系）的首年度常规观测数据，在r_P1与i_P1滤光片波段下，呈现了一批朝向M31的造父变星（Cepheid variable stars）样本。我们将对……进行描述。