Detailed view of four trains of bursts. Top panel: RGS light curve of obs ID 01050390301. The time resolution is 5 s (0.5–2 keV energy range). The other panels provide JEM-X light curves built in the 3–25 keV energy range, with a time resolution of 5 s. For reference, the time of occurrence of these trains of bursts are marked in Fig. 1e. The average recurrence times per panel are (from top to bottom): 3.23 ± 0.05, 3.39 ± 0.05 h, 5.11 ± 0.07 h, and 3.86 ± 0.06 h.