Early steep optical decay linked to reverse shock for GRB 200131A

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00619764" target="_blank" >RIV/67985815:_____/25:00619764 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0366405" target="_blank" >https://hdl.handle.net/11104/0366405</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.14311/AP.2025.65.0033" target="_blank" >10.14311/AP.2025.65.0033</a>

Result language
angličtina
Original language name
Early steep optical decay linked to reverse shock for GRB 200131A
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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