0740009

There have been few dedicated observations of Seyfert 2 galaxies by INTEGRAL. However it is at hard X-ray energies that absorption becomes less important and observations can potentially reveal the emission from the close environment of the central black hole. Unfortunately there are few Seyfert 2 galaxies persistently bright enough to justify the long INTEGRAL observations required. We request therefore an INTEGRAL TOO observation of a Seyfert 2 galaxy during a period when the 10-200 keV flux is above 25 mCrab. A second observation when the source has returned to its normal state is also requested to allow the study of correlation between the various spectral components.The principle motivation of the observation is a measurement of the high energy cut-off. Curvatures at high energies can be due to either a reflection component or an exponential cut-off. Comparisons with other Seyfert 2 observations show that 25 mCrab in the 15-50 keV band is bright enough to allow a measurment of the cut-off up to ~150 keV in 200 ksec. A cut-off energy in a Seyfert 2 has been found at energies as low as 50 keV (Circinus) using INTEGRAL data although in the Seyfert 2 best studied by INTEGRAL (NGC 4388) the cut-off was either absent or at enegies above 200 keV. Measurement of a Seyfert 2 while it is temporarily in a high flux state gives us perhaps the best chance of measuring another cut-off energy in a Seyfert 2 galaxy with INTEGRAL. [truncated! Please see actual data for full text]