15 GHz Radio Variability of Gamma-Ray Blazars

Details 15 GHz Radio Variability of Gamma-Ray Blazars 15 GHz Radio Variability of Gamma-Ray Blazars

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714201r&link_type=abstract

American Astronomical Society, AAS Meeting #217, #142.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Since 2007, the Owens Valley Radio Observatory (OVRO) 40 meter telescope has been engaged in an intensive fast-cadence gamma-ray blazar monitoring program, observing about 1500 objects twice per week. Using our intrinsic modulation index method and careful likelihood analyses, we find that gamma-ray loud objects associated with Fermi 1LAC sources in our sample demonstrate radio variability amplitudes significantly larger than do gamma-ray quiet objects. We also find significant differences in variability amplitude between flat spectrum radio quasars and BL Lacertae objects within our sample as well as possible evidence for cosmological evolution of variability amplitude.

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