0520056

We propose one 1000ks exposure of blazar PKS 1510-089. The source is bright and have very hard X-ray spectrum. High quality data obtained by INTEGRAL will allow us to determine the primary Comptonization mechanism for this source. We also plan to look for a location of the spectrum softening in soft gamma-rays and for soft X-ray excess. This information is crucial to accurately derive parameters of models of blazars. [truncated! Please see actual data for full text]