Orphan optical flare as SOSS emission afterglow, localization in time
High Energy Astrophysical Phenomena
2023-02-14 v1
Abstract
We report on MASTER optical observations of an afterglow-like optical and X-ray transient AT2021lfa/ZTF21aayokph. We detected the initial steady brightening of the transient at 7{\sigma} confidence level. This allowed us to use smooth optical self-similar emission of GRBs model to constrain the explosion time to better than 14 min as well as to estimate its initial Lorentz factor {\Gamma}0 = 20 +/- 10. Taking into consideration the low {\Gamma}0 and non-detection in gamma-rays, we classify this transient as the first failed GRB afterglow.
Keywords
Cite
@article{arxiv.2302.05924,
title = {Orphan optical flare as SOSS emission afterglow, localization in time},
author = {V. Lipunov and V. Kornilov and K. Zhirkov and N. Tyurina and E. Gorbovskoy and D. Vlasenko and S. Simakov and V. Topolev and C. Francile and R. Podesta and F. Podesta and D. Svinkin and N. Budnev and O. Gress and P. Balanutsa and A. Kuznetsov and A. Chasovnikov and M. Serra-Ricart and A. Gabovich and E. Minkina and G. Antipov and S. Svertilov and A. Tlatov and V. Senik and Yu. Tselik and Ya. Kechin and V. Yurkov},
journal= {arXiv preprint arXiv:2302.05924},
year = {2023}
}
Comments
8 pages, 5 figures, accepted for publication in MNRAS