Top panel: V band light curve of IGR J08408−4503, observed by the OMC. Bottom panel: same light curve, folded with the orbital period found by Gamen et al. (2015). Phase zero corresponds to the periastron passage. Blue points have a time duration of 10 s. Red line shows the binned light curve. The error bars of the red line are the standard deviation obtained from the magnitude values of the blue points and show their dispersion.