Fig. 5.
Panel a: X-ray spectrum of 4U 1901+03 taken from NuObs3 together with the composite model TBABS × (GAU + CONTINUUM × GABS) (solid lines) where CONTINUUM stands for CUTOFFPL, NPEX and PO × HIGHECUT and shown by blue, red and green curves, respectively. The corresponding residuals are shown in panels b, c and d. Only FPMA data are shown for the sake of clarity.
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