246 citations · 845 across the 36 of their papers we have counts for
8 papers · 1 filter
COMPTEL Time-Averaged All-Sky Point Source Analysis
W. Collmar, V. Schoenfelder, A. W. Strong +5
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 stand…
COMPTEL MeV Observations of the TeV Sources Markarian 421 and Markarian 501
W. Collmar, K. Bennett, H. Bloemen +5
The COMPTEL experiment aboard the COMPTON Gamma-Ray Observatory (CGRO) has observed the prominent TeV-blazars Mkn 421 and Mkn 501 many times between the start of its mission in Apr…
COMPTEL limits on 26Al 1.809 MeV line emission from gamma^2 Velorum
U. Oberlack, U. Wessolowski, R. Diehl +7
The Wolf-Rayet binary system gamma^2 Vel (WR 11} is the closest known Wolf-Rayet (WR) star. Recently, its distance has been redetermined by parallax measurements with the HIPPARCOS…
The hard X-ray and Ti-44 emission of Cas A
Jacco Vink, Jelle S. Kaastra, Johan A. M. Bleeker +1
We present an analysis of the BeppoSAX high X-ray energy spectrum of the supernova remnant Cassiopeia A with an observation time of 83 ks. We measure a flux upper limit of 4.1E-5 p…
Image Reconstruction of COMPTEL 1.8 MeV 26Al Line Data
J. Knodlseder, D. Dixon, K. Bennett +7
We present a new algorithm, called Multiresolution Regularized Expectation Maximization (MREM), for the reconstruction of gamma-ray intensity maps from COMPTEL data. The algorithm…
A New Look at Image Reconstruction of COMPTEL 1.8 MeV Data
J. Knodlseder, D. Dixon, R. Diehl +7
Deconvolving COMPTEL gamma-ray data into images presents a major methodological challenge. We developed a new algorithm called Multiresolution Regularized Expectation Maximization…
Assessment of Tracers of 1.8 MeV Emission
J. Knodlseder, R. Diehl, U. Oberlack +6
We examined the question of a possible correlation between 1.8 MeV emission and intensity distributions observed at other wavelengths by comparing the 1.8 MeV data to an extended s…
COMPTEL Observations of AGN at MeV-Energies
W. Collmar, K. Bennett, H. Bloemen +9
The COMPTEL experiment aboard CGRO, exploring the previously unknown sky at MeV-energies, has so far detected 10 Active Galactic Nuclei (AGN): 9 blazars and the radio galaxy Centau…