Panel (a): Evolution of HR of SAX J1808 during XMM-Newton observation of reflare phase of 2022 outburst. The HR was estimated from the (2–10 keV)/(0.7–2 keV) energy band. For comparison, the XMM-Newton light curve is shown in blue in the background. Panel (b): Hardness-intensity diagram (HID) of SAX J1808 obtained using XMM-Newton EPIC-pn observation and 200 s bins. The intensity is given in counts per second. The points corresponding to the minimum of the source X-ray flux on the light curve, between 59832.02 MJD and 59832.14 MJD, are marked in red.