Fig. 3
V/V−I and R/R−I diagrams for the period of our photometric observations. In the figure, the black diamonds denote observations from October 2000 to April 2003 (maximum level of brightness out of obscuration), the green diamonds observations from August 2003 to March 2010 (when the brightness of the star dropped) and the pink diamonds from August 2010 to April 2015 (when the brightness of the star increased).
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