086184

Blazars are AGN with powerful relativistic jets. While their high energy emission processes are still poorly understood comma upcoming X-ray polarization observations can shed much needed light. ISP blazars are particularly interesting since their X-ray emission falls in the transition region between synchrotron and Inverse-Compton openParICclosePar providing ideal laboratories to test emission scenarios. Here we propose an keyOpen it XMMkeyClose observation of one of the best ISP candidates aiming to quantify its synchrotron and IC contributions through the 1-10 keV band. The proposed observations will allow for a detailed prediction of the X-ray polarization and a deeper understanding of the blazar SED.