PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Gamma-ray Astronomy (GA)
The Cosmic X-ray Background explorer (CXBe)
N. Produit*, H. Li and R. Walter
Full text: pdf
Pre-published on: July 25, 2023
Published on:
Abstract
Synthesis models of the diffuse Cosmic X-ray Background (CXB) suggest that it can be resolved
into discrete sources, primarily Active Galactic Nuclei (AGNs). Measuring the CXB accurately
offers a unique probe to study the AGN population in the nearby Universe. Current hard X-ray
instruments suffer from the time-dependent background and cross-calibration issues. As a result,
their measurements of the CXB normalization have an uncertainty of the order of ∼15%. We
present the concept and simulated performances of a CXB detector, which could be operated on
different platforms. With a 16-U CubeSat mission running for more than two years in space, such
a detector could measure the CXB normalization with ∼1% uncertainty.
DOI: https://doi.org/10.22323/1.444.0911
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