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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…
Likely detection of pulsed high-energy gamma-rays from millisecond pulsar PSR J0218+4232
L. Kuiper, W. Hermsen, F. Verbunt +4
We report on the likely detection of pulsed high-energy gamma-rays from the binary millisecond pulsar PSR J0218+4232 in 100-1000 MeV data from CGRO EGRET. Imaging analysis demonstr…
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…
COMPTEL detection of pulsed gamma-ray emission from B1509-58 up to at least 10 MeV
L. Kuiper, W. Hermsen, J. M. Krijger +5
We report on the first firm detection of pulsed gamma-ray emission from PSR B1509-58 in the 0.75-30 MeV energy range in CGRO COMPTEL data collected over more than 6 years. The modu…
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…