SPI/INTEGRAL measurement of the Central radian soft gamma-ray continuum emission

It is clear now that unresolved sources contribute for the greatest part to the soft gamma-ray ``diffuse emission'' estimated by past instruments, and that always better sensitivity of the instruments leads to continuous reduction of this ``diffuse emission.'' The last stage is brought now by the INTEGRAL observatory. INTEGRAL is performing a deep survey of the central radian of the galaxy. First, we have built a catalogue of the hard sources of X-ray ($>$ 20 keV) detected by SPI/INTEGRAL, extracted their spectra and light curves simultaneously as the ``diffuse emission'' flux whose morphology has been represented with a simple analytical model. Finally we compared the total sources and the ``diffuse emission'' contributions.