GRB 190919B: Rapid optical rise explained as a flaring activity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00558961" target="_blank" >RIV/67985815:_____/22:00558961 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/22:00558961 RIV/00216224:14310/22:00126300 RIV/68407700:21230/22:00358718
Result on the web
<a href="https://hdl.handle.net/11104/0332727" target="_blank" >https://hdl.handle.net/11104/0332727</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202143010" target="_blank" >10.1051/0004-6361/202143010</a>
Alternative languages
Result language
angličtina
Original language name
GRB 190919B: Rapid optical rise explained as a flaring activity
Original language description
Following the detection of a long GRB 190919B by INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory), we obtained an optical photometric sequence of its optical counterpart. The light curve of the optical emission exhibits an unusually steep rise similar to 100 s after the initial trigger. This behaviour is not expected from a 'canonical' GRB optical afterglow. As an explanation, we propose a scenario consisting of two superimposed flares: an optical flare originating from the inner engine activity followed by the hydrodynamic peak of an external shock. The inner-engine nature of the first pulse is supported by a marginal detection of flux in hard X-rays. The second pulse eventually concludes in a slow constant decay, which, as we show, follows the closure relations for a slow cooling plasma expanding into the constant interstellar medium and can be seen as an optical afterglow sensu stricto.
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
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
1432-0746
Volume of the periodical
662
Issue of the periodical within the volume
June
Country of publishing house
FR - FRANCE
Number of pages
7
Pages from-to
A126
UT code for WoS article
000819042700005
EID of the result in the Scopus database
2-s2.0-85133735273