COMPTEL Time-Averaged All-Sky Point Source Analysis
W.Collmar, V.Schönfelder, A.W.Strong
We use all COMPTEL data from the beginning of the CGRO mission (April '91)
up to the end of CGRO Cycle 6 (November '97) to carry out all-sky point
source analyses in the four standard COMPTEL energy bands for different
time periods: the sum of all data as well as different subdivisions, e.g.
CGRO Phases/Cycles 1-3 and 4-6 separately. We apply our standard
maximum-likelihood method to generate all-sky significance and flux maps for
point sources by subtracting off the diffuse emission components via model
fitting. In addition, fluxes of known sources have been determined for
individual CGRO Phases/Cycles to generate lightcurves with a time resolution
of the order of one year. The goal of the analysis is to derive quantitative
results - significances, fluxes, light curves - of our brightest and most
significant sources such as 3C 273, and to search for additional new
COMPTEL sources, showing up in the summed data only. The analysis results,
all-sky point source maps as well as time-averaged source spectra and light
curves for several individual sources (e.g. 3C 279, PKS 0528+134), with
emphasis on AGN will be presented.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.