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We utilize the joint capabilities of IBIS and SPI to perform a state-resolved20--2000\,keV analysis of the microquasar Cygnus X-1. In both LHS and HSS, thespectral analysis reveals the presence of a high-energy tail above 400\,keV inaddition to a standard, Compton-like continuum in the 20--400\,keV range. Westudy the polarisation properties of the hard X-ray radiation, as well as ofthe polarisation of this high-energy tail. Polarisation is detected in the LHSin agreement with previous work. We find potential variations of the LHSpolarisation with time and no polarisation detection in the HSS.

Long-term spectral study of the black hole Cygnus X-1 using INTEGRAL