The high energy X-ray probe (HEX-P): bringing the cosmic X-ray background into focus
The high energy X-ray probe (HEX-P): bringing the cosmic X-ray background into focus
Since the discovery of the cosmic X-ray background (CXB), astronomers have strived to understand the accreting supermassive black holes (SMBHs) contributing to its peak in the 10–40 keV band. Existing soft X-ray telescopes could study this population up to only 10 keV, and, while NuSTAR (focusing on 3–24 keV) made …