Background modelling in COMPTEL Al-26 1.8 MeV studies
R.Diehl, A.Iyudin, S.Plüschke, V.Schönfelder
The background that needs to be accounted for in Al-26 1.8 MeV
studies consists of an instrumental component and the celestial
continuum emission. We have applied two different methods to
determine this background in the 3-dimensional COMPTEL data
space. One method treats the instrumental and celestial
backgrounds as one entity, scaling the event distributions
at adjacent energies (used in most of our 1.8 MeV studies).
A more recently developed method treats the two background
components separately, first attempting to determine the
celestial continuum contribution under the 1.8 MeV line
by interpolation from adjacent energies. The instrumental
background can then be determined following our standard
approach for our continuum studies. We present a detailed
comparison of the two methods and the resulting maps.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.