Background-subtracted light curve of X7 in XMM0, XMM1, and XMM2 (from left to right), binned at ΔT = 300 s (see the top-left legend), for the 0.3–10 keV (top panel), 0.3–0.8 keV (centre-top), and 0.8–10 keV (centre-bottom) energy bands. We also show the hardness ratio between the hard and the soft band (bottom panel). The dashed vertical lines divide the data between XMM0, XMM1, and XMM2, where the real time gaps between them were removed for displaying purposes only.