Measuring the cosmic X-ray background accurately
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Published:2023-07-06
Issue:1
Volume:56
Page:141-170
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ISSN:0922-6435
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Container-title:Experimental Astronomy
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language:en
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Short-container-title:Exp Astron
Author:
Li Hancheng,Walter Roland,Produit Nicolas,Hubert Fiona
Abstract
AbstractSynthesis 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 $$\sim $$
∼
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-Unit CubeSat mission running for more than two years in space, such a detector could measure the CXB normalization with $$\sim $$
∼
1% uncertainty.
Funder
University of Geneva
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Astronomy and Astrophysics
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