Exploring the multi-wavelength properties of the high energetic event ZTF20abbiixp/GRB 200524A: from prompt emission to afterglow
Year: 2026
Type: preprint
Abstract: We conducted a comprehensive multi-wavelength analysis of a high energetic long-duration ZTF20abbiixp / GRB~200524A detected by \textit{Fermi} Gamma Ray Burst Monitor (GBM). Our study combines extended high-energy observations from multiple space-based observatories including \textit{Fermi} with broadband afterglow data spanning X-ray to radio wavelengths, complemented by extensive photometric and spectroscopic follow-up from several ground-based optical facilities worldwide like 3.6-m Devasthal Optical Telescope (DOT). ZTF20abbiixp / GRB~200524A exhibits almost negligible spectral lag, likely arising from the presence of multiple overlapping emission episodes, a property uncommon among long-duration bursts. The burst additionally shows a clear intensity-tracking evolution of the prompt-emission spectral parameters. The broadband afterglow light curve best fits with a broken powerlaw with a break at $10^{5}$ s since the GBM trigger. The electron powerlaw index (p) calculated from the temporal and spectral slopes fail to distinguish between a interstellar medium and a wind environment. Our custom-developed afterglow model fits the panchromatic data well, combining forward shock (FS) and reverse shock (RS) emission. The RS contribution required to fit the early time optical data. The inferred afterglow model parameters suggest that ZTF20abbiixp / GRB~200524A is a high energetic burst expanding into a dense ISM environment, with a relatively large value of the fraction of energy going to accelerating electron and magnetic field ($ε_B$).
Source: arXiv (Cornell University)
Authors: Ghosh, A., Dimple, Misra, K., Minaev, P. Yu., Yao, Y., Kann, D. A., Blazek, M., Pozanenko, A. S., Belkin, S., Izzo, L., Kumar, H., Postigo, A. de Ugarte, Rossi, A., Anupama, G. C., Bhalerao, V., Bhattacharya, D., Chakradhari, N. K., Chandra, S., Gupta, R., Jayasurya, K. M., Kumar, A., Kumar, B., Kumar, T. S., Moskvitin, A., Pandey, S. B., Omar, A., Rao, A. R., Resmi, L., Rumyantsev, V., Sanwal, P., Volnova, A. V., Novichonok, A. O., Krugov, M., Ehgamberdiev, S. A., Volvach, A. E.
Institutions: Aryabhatta Research Institute of Observational Sciences, University of Birmingham, Russian Academy of Sciences, Space Research Institute, California Institute of Technology, Instituto de Astrofísica de Andalucía, National Research University Higher School of Economics, Monash University, University of Copenhagen, Astronomical Observatory of Capodimonte, Indian Institute of Technology Bombay, Center for Astrophysics Harvard & Smithsonian, Osservatorio di Astrofisica e Scienza dello Spazio, National Institute for Astrophysics, Indian Institute of Astrophysics, Ashoka University, Pandit Ravishankar Shukla University, Indian Institute of Space Science and Technology, Royal Holloway University of London, Yunnan University, Special Astrophysical Observatory, Indian Institute of Technology Kanpur, Tata Institute of Fundamental Research, Crimean Astrophysical Observatory, Petrozavodsk State University, Keldysh Institute of Applied Mathematics, Fesenkov Astrophysical Institute, Samarkand State University named after Sharof Rashidov, Academy of Sciences Republic of Uzbekistan, Ulugh Beg Astronomical Institute, Centre National de la Recherche Scientifique, Astrophysique Relativiste, Théories, Expériences, Métrologie, Instrumentation, Signaux
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, National Aeronautics and Space Administration, Gordon and Betty Moore Foundation, Oak Ridge Associated Universities, National Research Foundation, Department of Science and Technology, Ministry of Science and Technology, India, Indo-US Science and Technology Forum, Indian Institute of Technology Bombay, Junta de Andalucía, Instituto de Astrofísica de Andalucía, Science and Technology Facilities Council, Science and Engineering Research Board, Consejo Superior de Investigaciones Científicas
OpenAlex ID: W7202203262