Stromgren photometry of NGC 6397

CCD photometry extending below the turnoff of the globular cluster NGC 6397 on the uvbyH{beta} system is presented and analyzed. Restricting the sample to stars with small...本文呈现并分析了基于uvbyHβ测光系统（uvbyHβ system）的CCD测光（CCD photometry）数据，其测光范围覆盖球状星团NGC 6397的主序转折点以下波段；我们将样本限定于具有小[原文未完整给出后续内容]的恒星。