Panel a: Bolometric luminosity of GRO J1008−57 obtained by the Swift/XRT telescope. The luminosity is calculated from the unabsorbed flux assuming a distance d = 5.8 kpc and fixed N_H = 2.0 × 10²² cm^-2. The dashed red and dotted blue lines show the predicted luminosity L_prop for the transition to the propeller regime and the observed transition to the low-level stable accretion regime, respectively. Panels b and c represent variations of the photon index and absorption value with time, respectively. Black symbols correspond to the fixed N_H, red triangles and blue open squares to the absorption as a free parameter. In panel d the estimated 3σ upper limits for the pulsed fraction as function of time are shown for the Swift/XRT data with the horizontal dashed line showing the typical pulsed fraction measured during the bright state. The pulsations are clearly detected in all observations, which are expected to be sufficiently sensitive (i.e. below this line), but not elsewhere.