We present observations of the High Mass X-ray Binary GX 301 - 2 taken during the Galactic Plane Scan ( GPS ) with INTEGRAL following our RXTE observations ( ) .
The optical companion of GX 301 - 2 is the B1Ia+ hypergiant Wray 977 with a luminosity of 1.3 \times 10 ^ { 6 } \mbox { L } _ { \odot } and a mass of \sim 48 \mbox { M } _ { \odot } making the system one of the most massive X-ray binaries known .
The system was observed 24 times during the GPS thus covering many orbital phases including the pre-periastron flare .
The source is clearly detected in all INTEGRAL instruments in most pointings .
The derived X-ray light curves show strong variability on all timescales .
Depending on the orbital phase of the pointings , the luminosity changes by factor of more than 10 during the pre-periastron flare compared to other pointings .
Furthermore , broad band spectra using all instruments available on INTEGRAL are compared with data taken by the RXTE instruments PCA and HEXTE ( using the same data as in ) .