Searching for Stochastic gravitational wave background In InPTA Data Release 2

Pulsar Timing Array (PTA) experiments serve as a crucial method for detecting gravitational waves within the nanohertz frequency range by observing the minute perturbations these waves induce in the travel times of radio pulses exchanged between Earth and pulsars. These experiments aim to provide evidence for a Stochastic Gravitational Wave Background (SGWB), a signal theorised to result from numerous overlapping gravitational wave sources, including supermassive black hole binaries and cosmological phenomena originating from the early universe. Numerous PTA experiments are ongoing worldwide. Recent efforts hint at SGWB's existence, but no significant detection has been made yet. With the recent InPTA Data Release 2, this dataset is analysed for the first time for SGWB signals. By using advanced noise modelling and data analysis techniques, this study improves sensitivity to gravitational waves. The results from this investigation mark a significant advancement in leveraging the InPTA dataset and contribute to the global endeavour to detect and characterize the SGWB. I intend to present the findings of the search for Stochastic Gravitational Wave Background in the Indian Pulsar Time Array data release 2.