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| Variability in Blazars | |
| 摘 要： | 1 IntroductionItiswellknownthatblazarscomprisethreesubgroupsincludingHPQs (HighlyPolarizedquasars) ,OVVs (OpticallyViolentlyVariables) ,andBLLacs.Anditisfoundthatthesethreesubgroupsarevariableontimescalefromyearstohoursinallregimes (Wagner&Witzel1 995) 1].Blazarshaveveryhighenergeticemissions.Manyblazars (66positiveand 2 5marginaldetections)areGevgamma raysources (Fichteletal.1 994,vonMontignyetal.1 995;Hartmanetal.1 991 ) 2～4 ],andsomeareTevgamma rayonessuchasMark 42 1 ,Mark 50 … |
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