gri photometry of variables in NGC 4258

We present results of a ground-based survey for Cepheid variables in NGC4258. This galaxy plays a key role in the Extragalactic Distance Scale due to its very precise and...本研究报道了针对NGC4258天区内造父变星（Cepheid variables）的地面巡天观测成果。该星系凭借其极高精度的[原文未竟表述]，在河外距离尺度（Extragalactic Distance Scale）研究中占据关键地位。