GRB 190919B: Rapid optical rise explained as a flaring activity

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 ∼100 s after the initial trigger. This behavio...

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Authors: Jelínek, Martin, Topinka, Martin, Karpov, Sergey, Maleňáková, Alžběta, Hu, Y. D., Rigoselli, Michela, Štrobl, Jan, Ebr, Jan, Cunniffe, Ronan, Thoene, Christina, Mašek, Martin, Janeček, Petr, Fernández-García, E., Hiriart, David, Lee, William H., Vítek, Stanislav, Hudec, René, Trávníček, Petr, Castro-Tirado, Alberto J., Prouza, Michael
Format: article
Status:Published version
Publication Date:2022
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/285731
Online Access:http://hdl.handle.net/10261/285731
Access Level:Open access
Keyword:Techniques: photometric
Gamma-ray burst: individual: GRB190919B
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spelling GRB 190919B: Rapid optical rise explained as a flaring activityJelínek, MartinTopinka, MartinKarpov, SergeyMaleňáková, AlžbětaHu, Y. D.Rigoselli, MichelaŠtrobl, JanEbr, JanCunniffe, RonanThoene, ChristinaMašek, MartinJaneček, PetrFernández-García, E.Hiriart, DavidLee, William H.Vítek, StanislavHudec, RenéTrávníček, PetrCastro-Tirado, Alberto J.Prouza, MichaelTechniques: photometricGamma-ray burst: individual: GRB190919BFollowing 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 ∼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. © ESO 2022.The operation of the robotic telescope FRAM is supported by the grant of the Ministry of Education of the Czech Republic LM2018102. The data calibration and analysis related to the FRAM telescope is supported by the Ministry of Education of the Czech Republic MSMT-CR LTT18004, MSMT/EU funds CZ.02.1.01/0.0/0.0/16_013/0001402 and CZ.02.1.01/0.0/0.0/18_046/0016010. SK and MP acknowledge support from the European Structural and Investment Fund and the Czech Ministry of Education, Youth and Sports (Project CoGraDS – CZ.02.1.01/0.0/0.0/15_003/0000437). MT and MR acknowledge support from the Ministry of Education and Research of Italy via project PRIN-MIUR 2017 UnIAM (Unifying Isolated and Accreting Magnetars). YDH acknowledges support under the additional funding from the RYC2019-026465-I. AJCT acknowledges support from the Spanish Ministry Project PID2020-118491GB-I00 and the “Center of Excellence Severo Ochoa” award for the Instituto de Astrofísica de Andalucía (SEV-2017-0709) as well as technical support from both NIWA Lauder and San Pedro Mártir Astronomical Observatory staff.Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/285731reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//SEV-2017-0709info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-118491GB-I00http://dx.doi.org/10.1051/0004-6361/202143010Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2857312026-05-22T06:33:51Z
dc.title.none.fl_str_mv GRB 190919B: Rapid optical rise explained as a flaring activity
title GRB 190919B: Rapid optical rise explained as a flaring activity
spellingShingle GRB 190919B: Rapid optical rise explained as a flaring activity
Jelínek, Martin
Techniques: photometric
Gamma-ray burst: individual: GRB190919B
title_short GRB 190919B: Rapid optical rise explained as a flaring activity
title_full GRB 190919B: Rapid optical rise explained as a flaring activity
title_fullStr GRB 190919B: Rapid optical rise explained as a flaring activity
title_full_unstemmed GRB 190919B: Rapid optical rise explained as a flaring activity
title_sort GRB 190919B: Rapid optical rise explained as a flaring activity
dc.creator.none.fl_str_mv Jelínek, Martin
Topinka, Martin
Karpov, Sergey
Maleňáková, Alžběta
Hu, Y. D.
Rigoselli, Michela
Štrobl, Jan
Ebr, Jan
Cunniffe, Ronan
Thoene, Christina
Mašek, Martin
Janeček, Petr
Fernández-García, E.
Hiriart, David
Lee, William H.
Vítek, Stanislav
Hudec, René
Trávníček, Petr
Castro-Tirado, Alberto J.
Prouza, Michael
author Jelínek, Martin
author_facet Jelínek, Martin
Topinka, Martin
Karpov, Sergey
Maleňáková, Alžběta
Hu, Y. D.
Rigoselli, Michela
Štrobl, Jan
Ebr, Jan
Cunniffe, Ronan
Thoene, Christina
Mašek, Martin
Janeček, Petr
Fernández-García, E.
Hiriart, David
Lee, William H.
Vítek, Stanislav
Hudec, René
Trávníček, Petr
Castro-Tirado, Alberto J.
Prouza, Michael
author_role author
author2 Topinka, Martin
Karpov, Sergey
Maleňáková, Alžběta
Hu, Y. D.
Rigoselli, Michela
Štrobl, Jan
Ebr, Jan
Cunniffe, Ronan
Thoene, Christina
Mašek, Martin
Janeček, Petr
Fernández-García, E.
Hiriart, David
Lee, William H.
Vítek, Stanislav
Hudec, René
Trávníček, Petr
Castro-Tirado, Alberto J.
Prouza, Michael
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Techniques: photometric
Gamma-ray burst: individual: GRB190919B
topic Techniques: photometric
Gamma-ray burst: individual: GRB190919B
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 ∼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. © ESO 2022.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/285731
url http://hdl.handle.net/10261/285731
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MICINN//SEV-2017-0709
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-118491GB-I00
http://dx.doi.org/10.1051/0004-6361/202143010
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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repository.mail.fl_str_mv
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