Pole-on sketch of the system showing the relative sizes of the companion star and the NS orbit (NS size not to scale, the observer would be situated in a perpendicular plane with respect to the orbit). The light curves are displayed parallel to the orbit. Green represents the 9 uninterrupted Chandra light curves from the dataset analyzed in this paper scaled to the count rate. Red represents a former XMM-Newton light curve taken in 2015 scaled accordingly to fit the figure.