Swift/XRT (top) and INTEGRAL/ISGRI (bottom) light curves of a flare during MJD 57388.72–57388.87 (Obs. ID 00031403134 from 1 January 2016). The XRT PC mode data is shown in red and the WT data in blue. Spectral changes during the first XRT snapshot are shown in Fig. 4 and the broad-band spectrum with INTEGRAL and the second Swift snapshot is shown in Fig. 5. The ISGRI-only flare extraction (FX) times tabulated in Table 3 are denoted with horizontal lines.