Contour plots of the disk normalization (left scale) and the corresponding disk inner radius R_in,diskbb (right scale) vs. the disk inner radius R_in,laor deduced from the laor profile. The five XIS spectra have been fitted with a diskbb + laor model and a power law (top) or a comptonization model comptt (bottom) for the continuum. We assume a disk inclination of 20 deg., a distance of 8 kpc and a black hole mass of 10 solar masses. For OBS5, the 90% confidence area is to the left of the light green line. The dashed contour corresponds to the Suzaku observation of 2008 (Tomsick et al. 2009).