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COMPTEL Observation of the Flaring Quasar PKS0528+134 | | S. Zhang
; T.P. Li
; M. Wu
; | | Date: |
8 Oct 1998 | | Subject: | astro-ph | | Affiliation: | 1,2), T.P. Li , and M. Wu ( High Energy Astrophys. Lab., IHEP, Beijing; Inst. of Theoretical Physics, Beijing | | Abstract: | With a direct demodulation method, we have reanalyzed the data from COMPTEL/CGRO observation of PKS0528+134 during the 1993 March flare in gamma-rays. Our results show that during the flare gamma-rays were detected at a level approximately 2.4-3.8 times greater than the observed intensity in two earlier COMPTEL observations VP 0 and VP 1 in the energy range 3 MeV to 30 MeV. The 3-30 MeV time variability of the flux follows well the trend as observed by EGRET/CGRO at higher energies. No convincing excess can be found around the position of PKS0528+134 in the energy range 0.75 MeV to 3 MeV, which indicates a spectral break around 3 MeV. The detections and non-detections in the four standard COMPTEL energy bands are consistent with the earlier reports given by Collmar et al., while the feature that gamma-rays of the quasar still kept on flaring at energies down to 3 MeV is clearly found. | | Source: | arXiv, astro-ph/9810126 | | Services: | Forum | Review | PDF | Favorites | |
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