MAXI/GSC 2–20 keV (in black) and INTEGRAL/IBIS 30–50 keV (colored dots) light curves of MAXI J1535 − 571 (top panel), MAXI J1820+070 (middle panel), and MAXI J1348 − 630 (bottom panel). The left and the right y-axes indicate the count rate for MAXI/GSC and INTEGRAL/IBIS, respectively. Definitions of the different periods and the corresponding colors are described in Sect. 2.4. The count rates for 1 Crab are indicated with the pink and blue dotted lines for MAXI/GSC and INTEGRAL/IBIS, respectively.