0619764 - ASÚ 2026 RIV CZ eng J - Článek v odborném periodiku
Jelínek, Martin - Novotny, Filip - Klose, S. - Stecklum, B. - Maleňáková, Alžběta - Štrobl, Jan
Early steep optical decay linked to reverse shock for GRB 200131A.
Acta Polytechnica. Roč. 65, č. 1 (2025), s. 33-39. ISSN 1210-2709. E-ISSN 1805-2363
Institucionální podpora: RVO:67985815
Klíčová slova: gamma-ray bursts * gamma-ray bursts * photometry
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 0.5, rok: 2024 ; AIS: 0.092, rok: 2024
Způsob publikování: Open access
DOI: https://doi.org/10.14311/AP.2025.65.0033

We observed an optical afterglow of GRB 200131A obtaining the first photometric point 63 s after the satellite trigger. This early observation shows a steep decay, suggesting either internal engine activity or a reverse shock. By fitting this data set, we show that the early data fit well as a reverse shock component of the GRB afterglow modeled as a thin shell expanding into a constant density interstellar matter. The fitting also shows a good agreement with a catalogued Milky Way galactic extinction and leaves little room for further extinction in the host galaxy. By judging several factors we conclude that the most likely redshift of this GRB is 0.9 +/- 0.1.
Trvalý link: https://hdl.handle.net/11104/0366405