Chromatic Afterglow of GRB 200829A
Pankov N.S. Pozanenko A.S. Minaev P.Y. Belkin S.O. Volnova A.A. Reva I.V. Serebryanskii A.V. Krugov M.A. Naroenkov S.A. Novichonok A.O. Zhornichenko A.A. Rumyantsev V.V. Antonyuk K.A. Egamberdiev S.A. Burkhonov O.A. Klunko E.V. Moskvitin A.S. Molotov I.E. Inasaridze R.Y.
March 2023Pleiades Publishing
Astronomy Letters
2023#49Issue 381 - 109 pp.
Abstract: We present the results of our analysis of multiwavelength observations for the long gamma-ray burst GRB 200829A. The burst redshift (Formula presented.) has been determined photometrically at the afterglow phase. In gamma rays the event is one of the brightest (in isotropic equivalent), (Formula presented.) erg. The multicolor light curve of the GRB 200829A afterglow is characterized by chromatic behavior and the presence of a plateau gradually transitioning into a power-law decay that can also be interpreted as a quasi-synchronous inhomogeneity (flare). We assume that the presence of a chromatic inhomogeneity in the early afterglow is consistent with the model of a structured jet.
afterglow , gamma-ray bursts , optical transients , photometric observations
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National Research University ‘‘Higher School of Economics’’, Moscow, 101000, Russian Federation
Space Research Institute, Russian Academy of Sciences, Moscow, 117997, Russian Federation
Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russian Federation
Fesenkov Astrophysical Institute, Almaty, Kazakhstan
Institute of Astronomy, Russian Academy of Sciences, Moscow, 119017, Russian Federation
Petrozavodsk State University, Petrozavodsk, 185035, Russian Federation
Crimean Astrophysical Observatory, Russian Academy of Sciences, Nauchny, 298409, Russian Federation
Ulugh Beg Astronomical Institute, Tashkent, 100052, Uzbekistan
Institute of Solar-Terrestrial Physics, Russian Academy of Sciences, Siberian Branch, Irkutsk, 664033, Russian Federation
Special Astrophysical Observatory, Russian Academy of Sciences, Karachai-Cherkessian Republic, Nizhnii Arkhyz, 369167, Russian Federation
Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Moscow, 125047, Russian Federation
Evgeni Kharadze Georgian National Astrophysical Observatory, Abastumani, 0301, Georgia
National Research University ‘‘Higher School of Economics’’
Space Research Institute
Lebedev Physical Institute
Fesenkov Astrophysical Institute
Institute of Astronomy
Petrozavodsk State University
Crimean Astrophysical Observatory
Ulugh Beg Astronomical Institute
Institute of Solar-Terrestrial Physics
Special Astrophysical Observatory
Keldysh Institute of Applied Mathematics
Evgeni Kharadze Georgian National Astrophysical Observatory
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