CCD photometry of NGC 2257 RR Lyrae
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https://b2find.eudat.eu/dataset/0f191c6e-6d8a-590f-b26b-0b1d673210c0
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资源简介：
B and V band CCD photometry is used to study 33 cluster and nine field RR Lyrae variables near the LMC cluster, NGC 2257. It is found that the mean magnitudes for the two groups...
