07.02.2023
Three Stage Collapse of the Long Gamma Ray Burst from GRB160625B Prompt Multiwavelength Observations
ApJ 943 , 181 (2023)
Three Stage Collapse of the Long Gamma Ray Burst from GRB160625B Prompt Multiwavelength Observations
https://iopscience.iop.org/article/10.3847/1538-4357/ac9307
ApJ 943 181
DOI 10.3847/1538-4357/ac9307
V. M. Lipunov1,2, V. A. Sadovnichy3, M. I. Panasyuk1,4, I. V. Yashin4, S. I. Svertilov1,4, S. G. Simakov2, D. Svinkin5, E. Gorbovskoy2, G. V. Lipunova1,2, V. G. Kornilov1,2, D. Frederiks5, V. Topolev1,2, R. Rebolo6, M. Serra6, N. Tiurina2, E. Minkina1,2, V. V. Bogomolov1,4, A. V. Bogomolov4, A. F. Iyudin4, A. Chasovnikov1,2, A. Gabovich8, A. Tsvetkova5, N. M. Budnev7, O. A. Gress2,7, G. Antipov2, I. Gorbunov2, D. Vlasenko1,2, P. Balanutsa2, R. Podesta9, K. Zhirkov1,2, A. Kuznetsov2, V. Vladimirov2, F. Podesta9, C. Francile9, Yu. Sergienko8, A. Tlatov10, O. Ershova7, D. Cheryasov2, V. Yurkov8, and A. V. Krylov2
This article presents the early results of synchronous multiwavelength observations of one of the brightest gamma-ray bursts (GRBs) GRB 160625B with the detailed continuous fast optical photometry of its optical counterpart obtained by MASTER and with hard X-ray and gamma-ray emission, obtained by the Lomonosov and Konus-Wind spacecraft. The detailed photometry led us to detect the quasi-periodical emission components in the intrinsic optical emission. As a result of our analysis of synchronous multiwavelength observations, we propose a three-stage collapse scenario for this long and bright GRB. We suggest that quasiperiodic fluctuations may be associated with forced precession of a self-gravitating rapidly rotating superdense body (spinar), whose evolution is determined by a powerful magnetic field. The spinar's mass allows it to collapse into a black hole at the end of evolution.
