Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flat-Fielding BATSE Occultation Data for use in a Hard X-Ray All Sky
  Survey   The BATSE mission aboard CGRO can be used to observe hard X-ray sources by
using the Earth occultation method. This method relies on measuring a step in
the count rate profile in each BATSE detector as a source rises above or sets
below the Earth's limb. A major problem in determining the step sizes (and
hence the flux) is in extracting the steps from the varying background. A
technique for flat-fielding the response of gamma ray detectors has been
developed at Southampton. The technique uses a dynamic Monte-Carlo model to
simulate the dominant components of the gamma-ray background encountered by the
experiment at any point in its orbit. A maximum likelihood imaging method is
also being developed that will be used to make a sky survey with all 9 years of
the BATSE Continuous data set in the 20 - 500 keV range. An all sky map of 25 -
35 keV emission has been made using 60 days of data and has a 3 sigma flux
sensitivity of 14 mCrab.

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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph