Rocking the BOAT: the ups and downs of the long-term radio light curve for GRB 221009A

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00598903" target="_blank" >RIV/67985815:_____/24:00598903 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0356475" target="_blank" >https://hdl.handle.net/11104/0356475</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stae2050" target="_blank" >10.1093/mnras/stae2050</a>

Result language

angličtina

Original language name

Rocking the BOAT: the ups and downs of the long-term radio light curve for GRB 221009A

Original language description

We present radio observations of the long-duration gamma-ray burst (GRB) 221009A that has become known to the community as the Brightest Of All Time or the BOAT. Our observations span the first 475 d post-burst and three orders of magnitude in observing frequency, from 0.15 to 230 GHz. By combining our new observations with those available in the literature, we have the most detailed radio data set in terms of cadence and spectral coverage of any GRB to date, which we use to explore the spectral and temporal evolution of the afterglow. By testing a series of phenomenological models, we find that three separate synchrotron components best explain the afterglow. The high temporal and spectral resolution allows us to conclude that standard analytical afterglow models are unable to explain the observed evolution of GRB 221009A. We explore where the discrepancies between the observations and the models are most significant and place our findings in the context of the most well-studied GRB radio afterglows to date. Our observations are best explained by three synchrotron-emitting regions that we interpret as a forward shock, a reverse shock, and an additional shock potentially from a cocoon or wider outflow. Finally, we find that our observations do not show any evidence of any late-time spectral or temporal changes that could result from a jet break but note that any lateral structure could significantly affect a jet break signature.

Czech name

—

Czech description

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Type

J_imp - 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)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Volume of the periodical

533

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

4435-4449

UT code for WoS article

001313249900003

EID of the result in the Scopus database

2-s2.0-85204339272