Measuring the Cosmic X-ray Background accurately
Instrumentation and Methods for Astrophysics
2023-07-11 v1
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%. In this paper, 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.
Cite
@article{arxiv.2307.04238,
title = {Measuring the Cosmic X-ray Background accurately},
author = {Hancheng Li and Roland Walter and Nicolas Produit and Fiona Hubert},
journal= {arXiv preprint arXiv:2307.04238},
year = {2023}
}