GRANDMA and HXMT observations of GRB 221009A: The standard luminosity Afterglow of a hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00581800" target="_blank" >RIV/68378271:_____/23:00581800 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0349953" target="_blank" >https://hdl.handle.net/11104/0349953</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/2041-8213/acc8d0" target="_blank" >10.3847/2041-8213/acc8d0</a>
Alternative languages
Result language
angličtina
Original language name
GRANDMA and HXMT observations of GRB 221009A: The standard luminosity Afterglow of a hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann
Original language description
Object GRB 221009A is the brightest gamma-ray burst (GRB) detected in more than 50 yr of study. In this paper, we present observations in the X-ray and optical domains obtained by the GRANDMA Collaboration and the Insight Collaboration. We study the optical afterglow with empirical fitting using the GRANDMA+HXMT-LE data sets augmented with data from the literature up to 60 days. We then model numerically using a Bayesian approach, and we find that the GRB afterglow, extinguished by a large dust column, is most likely behind a combination of a large Milky Way dust column and moderate low-metallicity dust in the host galaxy. Using the GRANDMA+HXMT-LE+XRT data set, we find that the simplest model, where the observed afterglow is produced by synchrotron radiation at the forward external shock during the deceleration of a top-hat relativistic jet by a uniform medium, fits the multiwavelength observations only moderately well.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal Letters
ISSN
2041-8205
e-ISSN
2041-8213
Volume of the periodical
948
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
34
Pages from-to
L12
UT code for WoS article
000992639300001
EID of the result in the Scopus database
2-s2.0-85158893430