The Chandra COSMOS legacy survey: Energy Spectrum of the Cosmic X-ray Background and constraints on undetected populations

Nico Cappelluti, Yanxia Li, Angelo Ricarte +15

Using {\em Chandra} observations in the 2.15 deg${}^2$ COSMOS legacy field, we present one of the most accurate measurements of the Cosmic X-ray Background (CXB) spectrum to date i…