BVRI PHOTOELECTRIC PHOTOMETRY FOR 275 STARS LOCATED BETWEEN 25 Y 50
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Observatorio Astrofísico de Tonantzintla, Pue, Pue, Mex
Abstract
BYRI photometry in Johnson's system was done for 275 stars the mayority of which are comprised between -25° and -50°. Due to systematic variations in V magnitude in R. A. of the order of 0.2 magnitude it was decided to use in the present work V magnitudes