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1·A new method is suggested for determining the characteristic curve of a plate, as well as the magnitude zero point, using PDS microdensitometer data of stars of known brightness on the plate.

本文提出一种新方法——密度矩和法，用底片上已知亮度恒星的PDS测微密度数据来同时决定底片特性曲线和星等零点。