4.8 GHz Intra-Day Variability of FSRQ 0507+179

TL;DR

This study investigates the intra-day radio flux variability of FSRQ 0507+179 at 4.8 GHz, revealing consistent IDV behavior across multiple epochs and changes following an optical flare, indicating complex variability patterns.

Contribution

First detailed multi-epoch radio IDV analysis of FSRQ 0507+179 at 4.8 GHz, identifying its likely type I IDV nature and variability changes post optical flare.

Findings

Clear IDV observed in all sessions

Likely a type I IDV source

IDV behavior changed after optical flare

Abstract

As one of targets of many flux monitoring campaigns, the FSRQ 0507+179 shows various flux variation properties at almost all observing wavelengths, from radio to $\gamma$-ray. With Urumqi 25-m telescope, our study on this object is focusing on its radio flux variability, especially the Intra-Day Variability (IDV). We carried out a total of six epochs of IDV observations on 0507+179 at 4.8 GHz since Mar. 2010, found clearly IDV behaviors in all observing sessions and consider it is likely a type I IDV source by analyzing the characteristics and the timescales of the light curves. Additionally, we found 0507+179 exhibited some different IDV behaviors after an optical flare.