Time-resolved spectroscopy of IGR J16318–4848. The figure shows the parameter evolution with time for the cutoffpl model. Panel a: equivalent hydrogen column density in units of 10²² cm⁻²; panels b andc: photon index and the folding energy in keV, respectively; panel d: unabsorbed continuum flux in units of 10⁻⁹ erg cm⁻² s⁻¹; and panel e: line flux of the Fe Kα line divided by the continuum flux. Red and blue data points show fits where first Γ and then Γ and E_fold have been fixed, respectively.