GRANDMA and HXMT observations of GRB 221009A: The standard luminosity Afterglow of a hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

GRANDMA and HXMT observations of GRB 221009A: The standard luminosity Afterglow of a hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

GRANDMA and HXMT observations of GRB 221009A: The standard luminosity Afterglow of a hyperluminous Gamma-Ray Burst—In Gedenken an David Alexander Kann

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Kosmologie, gravitace a temný sektor vesmíru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal Letters

ISSN

2041-8205

e-ISSN

2041-8213

Svazek periodika

948

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

34

Strana od-do

L12

Kód UT WoS článku

000992639300001

EID výsledku v databázi Scopus

2-s2.0-85158893430