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

TL;DR

This study investigates the correlation between gamma-ray and radio emissions in blazars using simultaneous observations from Fermi-LAT and OVRO, revealing insights into their activity connection.

Contribution

It provides the first detailed analysis of gamma-ray and radio activity correlation in a large blazar sample using quasi-simultaneous data.

Findings

Detected significant correlations between gamma-ray and radio light curves.

Established temporal relationships suggesting linked emission mechanisms.

Provided new insights into blazar variability patterns.

Abstract

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.