Gamma-Ray All Sky Imaging with BATSE

Details Gamma-Ray All Sky Imaging with BATSE Gamma-Ray All Sky Imaging with BATSE

2004-08-23

arxiv.org/abs/astro-ph/0408406v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures. Proceedings of the 5th INTEGRAL Workshop, Munich 16-20 February 2004. ESA SP-552

Scientific paper

The BATSE mission aboard CGRO observed the whole sky for 9 years in the 20 keV - 2 MeV energy band. Flat-fielding of the temporal variations in the background present in the data set has been accomplished through a GEANT3 Monte-Carlo simulation - the BATSE Mass Model (BAMM). The Earth Occultation technique (EOT) is used together with a maximum-likelihood imaging approach to construct all-sky maps with ~mCrab sensitivity. Additionally, a non-linear CLEAN algorithm is applied to the all-sky maps to remove large artefacts that are systematic of the EOT. The latest survey results produced through the application of this technique to a subset of the BATSE data set are presented.

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