Radio variability of 1st 3-months Fermi blazars at 5 GHz: affected by   interstellar scintillation?
  Blazars from the first-three-months Fermi-AGN list were observed with the Urumqi 25m radio telescope at 5GHz in IDV (Intra-Day Variability) mode and inter-month observation mode. A significant correlation between the flux density at 5GHz and the gamma-ray intensity for the Fermi-LAT detected blazars is seen. There is a higher IDV detection rate in Fermi detected blazars than those reported for other samples. Stronger variability appears at lower Galactic latitudes; IDV appears to be stronger in weaker sources, indicating that the variability is affected by interstellar scintillation. 
X. Liu (1), Z. Ding (1,2), J. Liu (1), N. Marchili (3) and T.P.   Krichbaum (3), ((1) Urumqi Observatory, NAOCAS, (2) Gradua...
astro-ph.CO