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OVV quasar
An optically violent variable quasar (often abbreviated as OVV quasar) is a type of highly variable quasar. It is a subtype of blazar that consists of a few rare, bright radio galaxies, whose visible light output can change by 50% in a day.〔Darling, David. 2004. ''The Universal Book of Astronomy''.〕 They are similar in appearance to BL Lacs but generally have a stronger broad emission line, and tend to have higher red shift components. ==Examples==
*3C 279
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