Unfolded absorbed broad-band spectrum of IGR J17498–2921 collected during the peak of the outburst, interval MJD 55 790.948–55 792.523, and the best-fit thermal Comptonization model compps. The data points are from the Swift/XRT (0.6–8 keV), RXTE/PCA (3–22 keV), and INTEGRAL/ISGRI (20–300 keV) instruments, respectively. The total model spectrum is shown by a solid line. The lower panel shows the residuals between the data and the model.