u'g'r'i'z' photometry in NGC 188

We continue our series of papers describing the results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter...本研究接续此前系列论文的研究脉络，介绍一项以南半球为主要观测区域的疏散星团（open star clusters）测光巡天（photometric survey）的观测成果，该巡天采用u'、g'、r'、i'、z'波段滤光片完成观测。