Spectral parameter variations of inner disk temperature (T_in), disk normalization and photon index (Γ), using the diskbb+power-law model for MAXI and Swift/XRT observations. MAXI data are represented by blue triangles and Swift/XRT data are represented by open circles. The last open triangle in the bottom panel shows the photon index of the MAXI spectrum (MJD 58915− MJD58935) fitted with a simple power-law model. The dashed line indicates the index transition deduced from MAXI and Swift/XRT spectral fittings.