Top: Obs 1 light curve phase-folded on the 71.49 s period. The profile shows a pulse fraction of  ~13%. The dashed line shows the relative exposure of each phase bin (a relative exposure of 1 equates to a count rate of 8.3 and 0 to 0 within this scaling). Bottom: hardness ratio between the 3−10 and 10−120 keV energy bands showing a hardening of the observed emission during the peaks in the above phase folded light curve. Both curves posses the same phase binning and arbitrary zero pulse phase ephemeris.