| Abstract : | Astrophysical jets in Gamma-Ray Bursts (GRBs) provide insights into particle emissions and high-energy physics. Our study focuses on GRB 220627A, an Ultra-long GRB with a potential lensing event. We investigate the spectral origins, particle emission mechanisms, and small-scale variabilities. Notably, the GBM time-resolved spectroscopy reveals contrasting spectral results between the time bins of the first and second episodes. We have divided the lightcurve of the first episode in different time-bins and compared it with the second episode. To our surprise, photon flux and spectral distribution do not resemble each other, except for the Power Law and Comptonized Power Law function which fits well for both episodes. Furthermore, Fermi-LAT flux ratio of MeV/GeV does not align with the second episode's high-energy flux ratio, as no gamma-ray photons were recorded during the second episode by LAT. However, we have observed 5 gamma-ray photons with energies greater than 1 GeV. These findings lead us to conclude that GRB 220627A is not a lensed GRB. In parallel, we explore high-energy jet variability in supermassive black hole-emitting Active Galactic Nuclei (AGNs). Our research deepens our understanding of these energetic cosmic phenomena. |
