On the dependence of the X-ray continuum variations with luminosity in accreting X-ray pulsars

K. A. Postnov, M. I. Gornostaev, D. Klochkov +3

Using RXTE/ASM archival data, we investigate the behaviour of the spectral hardness ratio as a function of X-ray luminosity in a sample of six transient X-ray pulsars (EXO 2030+375…