Connection between gamma-ray and radio activity of blazars from Fermi-LAT and 15 GHz radio monitoring with the OVRO 40-Meter Telescope

Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics

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3 pages, 1 figure, 2009 Fermi Symposium, eConf Proceedings C091122

Scientific paper

A large sample of blazar from the Candidate Gamma Ray Blazar Survey (CGRaBS) has been observed with the Owens Valley Radio Observatory (OVRO) 40-Meter Telescope at 15GHz. Using these quasi-simultaneous observations, we study the connection between the gamma-ray behavior of blazars as detected by Fermi-LAT and the cm band as observed by the F-GAMMA project with the OVRO 40-Meter Telescope. Comparing the light curves for a large number of sources, it is possible to study in detail the relation between the gamma-ray and radio activity of Fermi-LAT detected gamma-ray blazars. We present first results for correlations between Fermi-LAT and our 15 ~GHz observations.

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