Pulsar Temporal Studies with SPI

The good timing capabilities of the spectrometer SPI on INTEGRAL makes it a suitable tool for temporal studies although so far this quality has not been fully exploited. Preliminary results of the time analysis of SPI event data from the bright accreting pulsars EXO 2030+375 and A 0535+262 are shown, illustrating the instrument's potential for those purposes. Complemented with IBIS/ISGRI and other X-ray instruments, SPI allows a broad energy band coverage which is particularly relevant for pulsar studies, since comparative multi-wavelength analysis of pulse profiles are essential to understand their emission mechanism. We derived the pulse profiles and used hardness ratios to analyze the pulse spectral evolution.