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Published online by Cambridge University Press: 19 July 2016
We present a photometric (U band) investigation of the globular clusters in the central region of M87 from deep calibrated photographic and electronographic material, obtained with the CFH telescope. The aim of this work is to complete previous photometric studies at longer wavelengths (Grillmair et al., 1986; Lauer and Kormendy, 1986).