标题： COMPTEL 观测到的耀变星 PKS0528+134 显示英文标题

标题： COMPTEL Observation of the Flaring Quasar PKS0528+134

摘要： 采用直接解调方法，我们重新分析了COMPTEL/CGRO在1993年3月PKS0528+134伽马射线暴发期间的观测数据。我们的结果显示，在暴发期间，伽马射线在3到30 MeV能量范围内的探测强度大约比之前两次COMPTEL观测（VP 0和VP 1）所观察到的强度高2.4到3.8倍。3到30 MeV通量的时间变化趋势与EGRET/CGRO在更高能量下观测到的趋势一致。在0.75 MeV到3 MeV的能量范围内，未在PKS0528+134位置附近发现明显的过量信号，这表明在3 MeV左右存在能谱断裂。四个标准COMPTEL能量带中的探测和非探测结果与Collmar等人先前报告的结果一致，同时清楚地发现类星体在低至3 MeV的能量上仍持续暴发伽马射线。 显示英文摘要

摘要： 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.