Cosmic X‐Ray Background and Earth Albedo Spectra withSwiftBAT

2008/08/25 by M. Ajello, J. Greiner, G. Sato +8 · 11 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Particle Detector Development and Performance #astro-ph

paper · pdf · doi:10.1086/592595

Accepted for publication in the Astrophysical Journal. 38 Pages, 16 Figures, 2 Tables

arxiv created 2008/08/25 · openalex publication_date 2008/11/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31

Abstract

We use Swift BAT Earth occultation data at different geomagnetic latitudes to derive a sensitive measurement of the cosmic X-ray background (CXB) and of the Earth albedo emission in the 15-200 keV band. We compare our CXB spectrum with recent ( INTEGRAL , BeppoSAX ) and past results ( HEAO-1 ) and find good agreement. Using an independent measurement of the CXB spectrum we are able to confirm our results. This study shows that the BAT CXB spectrum has a normalization ~8% ± 3% larger than the HEAO-1 measurement. The BAT accurate Earth albedo spectrum can be used to predict the level of photon background for satellites in low Earth and mid inclination orbits.

Citations

• The Earth’s Gamma-ray Albedo as observed by EGRET
• BAT X‐Ray Survey. I. Methodology and X‐Ray Identification
• Hard X-ray emission of the Earth's atmosphere: Monte Carlo simulations

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Related

• Earth X-ray albedo for cosmic X-ray background radiation in the 1--1000 keV band
• The BeppoSAX 1-8 keV cosmic background spectrum
• Flat-Fielding BATSE Occultation Data for use in a Hard X-Ray All Sky Survey
• Extragalactic Background Light: Measurements and Applications
• The EPIC/MOS view of the 2-8 keV Cosmic X-ray Background Spectrum