- Conference date: 7–11 September 2009
- Location: Bologna (Italy)
Since mid‐2007, we have been monitoring ∼1200 sources at 15 GHz with the 40 M Telescope at the Owens Valley Radio Observatory. Our sample, mostly blazars, is monitored at least twice per week, yielding densely‐sampled light curves. A large fraction of the sources in our sample exhibit significant variation in 15 GHz flux density, enabling variability studies and cross‐correlations with other bands. Additionally, many have been detected by the Fermi Gamma‐ray Space Telescope. We compare our data with gamma‐ray data from Fermi and find a statistically significant flux density correlation after accounting for red shift and selection biases using a new Monte Carlo method. The OVRO program is a part of the F‐GAMMA project, which also obtains monthly 2.6–270 GHz radio spectra for a smaller, overlapping blazar sample.
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