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- W3106476856 abstract "We report results of observations and analyses on the γ-ray blazar PKS 1622-297, with emphasis on the COMPTEL data (0.75–30 MeV) collected between April 1991 and November 1997. PKS 1622-297 was detected as a source of γ-rays by the EGRET experiment aboard CGRO in 1995 during a γ-ray outburst at energies above 100 MeV lasting for five weeks. In this time period the blazar was significantly (~5.9 σ) detected by COMPTEL at 10–30 MeV. At lower COMPTEL energies the detection is marginal, resulting in a hard MeV spectrum. The combined COMPTEL/EGRET energy spectrum shows a break at MeV energies. The broad-band spectrum (radio – γ-rays) shows that the γ-ray emission dominates the overall power output. On top of the 5-week γ-ray outburst, EGRET detected a huge flare lasting for >1 day. Enhanced MeV emission (10–30 MeV) is found near the time of this flare, suggesting a possible time delay with respect to the emission above 100 MeV. Outside the 5-week flaring period in 1995, we do not detect MeV emission from PKS 1622-297." @default.
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- W3106476856 date "2002-05-01" @default.
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- W3106476856 title "COMPTEL observations of the gamma-ray blazar PKS 1622-297" @default.
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- W3106476856 doi "https://doi.org/10.1051/0004-6361:20020267" @default.
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