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However, a few dozen of them are faint, sparsely populated systems that were identified largely during the second half of the past century. One of the faintest is ESO 37-1 (E 3) and as such it remains poorly studied, with no spectroscopic observations published so far, although it was discovered in 1976.\n  Aims. We investigate the globular cluster E 3 in an attempt to better constrain its fundamental parameters. 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