Identifying variable gamma-ray sources through radio observations

Abstract

We present preliminary results of a campaign undertaken with different radio interferometers to observe a sample of the most variable unidentified EGRET sources. We expect to detect which of the possible counterparts of the γ -ray sources (any of the radio emitters in the field) varies in time with similar timescales as the γ -ray variation. If the γ -rays are produced in a jet-like source, as we have modelled theoretically, synchrotron emission is also expected at radio wavelengths. Such radio emission should appear variable in time and correlated with the γ -ray variability.