Low Frequency Radio Imaging Study of PSR J1818-1607

We report on the low-frequency radio observations of magnetar PSR J1818$-$1607 carried out with the upgraded Giant Metrewave Radio Telescope at band 3 (300$-$500 MHz) and band 4 (550-750 MHz). We have identified the continuum source associated with the magnetar and report variations in flux density and its spectral index. The flux density timeseries for the magnetar reveals the presence of two potential radio flaring episodes with varying spectral properties. We discuss the implications of the spectral index changes on the potential emission mechanisms for radio-loud magnetars. We also report non-detections of the continuum source as well as no direct indication for an associated diffuse emission from multiple archival radio imaging surveys.