Gamma-ray all-sky imaging with the Burst and Transient Source Experiment

• DOI: 10.1051/0004-6361:20034026
• Publication Date: 2004-04-16T11:34:02Z
• Authors: S. E. Shaw; M. J. Westmore; A. B. Hill; A. J. Bird; A. J. Dean; C. Ferguson; J. Knödlseder; J. J. Lockley; D. R. Willis
• Keywords: Occultation; Point source

The BATSE mission aboard CGRO monitored the whole sky in 20 keV-1 MeV energy band continuously from April 1991 until June 2000. Although had very poor intrinsic angular resolution, data can be used to survey entire soft gamma-ray with < resolution and ~mCrab sensitivity by using Earth occultation method. This method determines flux measuring step count rate profile each detector as a source rises above or sets below Earth's limb. A maximum likelihood imaging technique then build up all-sky maps images of limb produced occulting sources. However, since seen has radius ~70°, that intersect at positions bright point sources have significant effect over area map. for performing image cleaning on also been developed is effectively remove artefacts maps. paper describes “LIMBO” presents preliminary 25-160 keV emission, first made HEAO1-A4 1978-79.