Executive Summary : | Understanding the synergy between accretion and jets near black holes is crucial for understanding their impact on their environments. Radiation at radio and (hard) X-ray frequencies is the most direct probe of the immediate neighborhood of the black hole. The connection between X-ray and radio luminosities is well-established for all types of black holes. The fundamental plane of black hole activity is tested for various sources occupying different accretion states. This work proposes to check the dependence of the fundamental plane relation on X-ray and radio variability. A pilot study was conducted on 62 AGNs, which are ideally suited for a correlation study of X-ray and radio variability in AGNs in the context of the fundamental plane. The sources in the sample have long-baseline multi-epoch X-ray observations, appreciable X-ray variability between the two epochs, FIRST radio observations preceding the X-ray observations, and SDSS spectra available for black hole mass estimates. High-resolution 1.4 GHz observations for these 62 sources will be obtained using the uGMRT facility. This analysis will explore the potential of the fundamental plane as an estimator of black hole masses in AGNs. |