OVV quasar

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Artist’s impression of the optically violent variable quasar 3C 279.[1]

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.[2] OVV quasars have essentially become unified with highly polarized quasars (HPQ), core-dominated quasars (CDQ), and flat-spectrum radio quasars (FSRQ).[3] Different terms are used but the term FSRQ is gaining popularity effectively making the other terms archaic.

They are similar in appearance to BL Lacs but generally have stronger broad emission lines, and tend to have higher red shift components.[citation needed]



  1. ^ "APEX takes part in sharpest observation ever". ESO Press Release. Retrieved 18 July 2012. 
  2. ^ Darling, David. 2004. The Universal Book of Astronomy.
  3. ^ Urry, C. Megan & Padovani, Paolo, Unified Schemes for Radio-Loud Active Galactic Nuclei, Publications of the Astronomical Society of the Pacific, v.107, p.803, 1995