Photometry of variables in NGC 3370

We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space...本研究报道了两颗邻近Ia型超新星（Type Ia supernovae，SNe Ia）的观测资料，其宿主星系内的造父变星（Cepheid variables）观测数据已通过哈勃空间望远镜（Hubble Space Telescope）完成采集。