Multiband analyses of the bright GRB 230812B and the associated SN2023pel
Thomas Hussenot-DesenongesIJCLab, Univ Paris-Saclay , CNRS/IN2P3 Orsay, 91405 , FranceThibeau WoutersInstitute for Gravitational and Subatomic Physics (GRASP), Utrecht University , Princetonplein 1, NL-3584 CC Utrecht , the NetherlandsNidhal GuessoumPhysics Department, American University of Sharjah , Sharjah, 26666 , UAEI AbdiPhysics Department, American University of Sharjah , Sharjah, 26666 , UAEA AbulwfaNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptC. AdamiAix Marseille Univ, CNRS , CNES, 13388 LAM Marseille , FranceJ. F. Agüí FernándezInstituto de Astrofísica de Andalucía , Glorieta de la Astronomía s/n, E-18008 Granada , SpainTomás AhumadaCahill Center for Astrophysics, California Institute of Technology , Pasadena, CA 91125 , USAV. AivazyanE. Kharadze Georgian National Astrophysical Observatory , Mt. Kanobili, Abastumani 0301, Adigeni , GeorgiaDalya AklPhysics Department, American University of Sharjah , Sharjah, 26666 , UAEShreya AnandCahill Center for Astrophysics, California Institute of Technology , Pasadena, CA 91125 , USACristina AndradeSchool of Physics and Astronomy, University of Minnesota , Minneapolis, MN 55455 , USAS. AntierObservatoire de la Côte d’Azur, Université Côte d’Azur , Boulevard de l’Observatoire, F-06304 Nice , FranceS. A. AtaNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptP. D’AvanzoINAF–Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC) , ItalyYosry A. AzzamNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptA. BaranskyAstronomical Observatory of Taras Shevchenko National University of Kyiv , Observatorna Str. 3, UA-04053 Kyiv , UkraineS. BasaAix Marseille Univ, CNRS , CNES, 13388 LAM Marseille , FranceM. BłażekCEICO, Institute of Physics of the Czech Academy of Sciences , Na Slovance 1999/2, CZ-182 21 Praha , Czech RepublicPhilippe BendjoyaLaboratoire J.-L. Lagrange, Université de Nice Sophia-Antipolis, CNRS , Observatoire de la Côte d’Azur, F-06304 Nice , FranceS. BeradzeE. Kharadze Georgian National Astrophysical Observatory , Mt. Kanobili, Abastumani 0301, Adigeni , GeorgiaP. BoumisNational Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing , GR-15236 Penteli , GreeceMichael BremerInstitut de Radioastronomie Millimétrique , Saint-Martin-d'Hères, 38406 , FranceR. BrivioINAF–Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC) , ItalyV. BuatAix Marseille Univ, CNRS , CNES, 13388 LAM Marseille , FranceMattia BullaDepartment of Physics and Earth Science, University of Ferrara , via Saragat 1, I-44122 Ferrara , ItalyО. БурхоновUlugh Beg Astronomical Institute, Uzbekistan Academy of Sciences , Astronomy Str. 33, Tashkent 100052 , UzbekistanEric BurnsDepartment of Physics and Astronomy, Louisiana State University , Baton Rouge, LA 70803 , USAS. B. CenkoAstrophysics Science Division, NASA Goddard Space Flight Center , 8800 Greenbelt Rd, Greenbelt, MD 20771 , USAM. W. CoughlinSchool of Physics and Astronomy, University of Minnesota , Minneapolis, MN 55455 , USAW. J. B. CorradiLaboratório Nacional de Astrofísica - LNA, Rua Estados Unidos , 154 Itajubá - MG CEP 37504-364 , BrazilF. DaigneSorbonne Université, CNRS , UMR 7095, Institut d’Astrophysique de Paris, 98 bis bd Arago, F-75014 Paris , FranceTim DietrichInstitute for Physics and Astronomy, University of Potsdam , Haus 28, Karl-Liebknecht-Str. 24/25, D-14476 Potsdam , GermanyDamien DornicAix Marseille Univ , CNRS/IN2P3, CPPM, 13288 Marseille , FranceJ.-G. DucoinAix Marseille Univ , CNRS/IN2P3, CPPM, 13288 Marseille , FranceP. DuverneUniversité Paris Cité, CNRS , Astroparticule et Cosmologie, F-75013 Paris , FranceE. G. ElhosseinyNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptFarag ElnagahyNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptMohamed A El-SadekNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptM. FerroINAF–Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC) , ItalyE. Le Floc’hUniversité Paris-Saclay, Université Paris Cité , CEA, CNRS, AIM, F-91191 Gif-sur-Yvette , FranceM FreebergJ. P. U. FynboCosmic Dawn Center (DAWN) , 2200 Copenhagen , DenmarkD. GötzUniversité Paris-Saclay, Université Paris Cité , CEA, CNRS, AIM, F-91191 Gif-sur-Yvette , FranceE. A. GurbanovN. Tusi Shamakhy Astrophysical Observatory, Ministry of Science and Education , settl. Y. Mammadaliyev, AZ-5626 Shamakhy , AzerbaijanGehane M. HamedNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptElgun K. HasanovN. Tusi Shamakhy Astrophysical Observatory, Ministry of Science and Education , settl. Y. Mammadaliyev, AZ-5626 Shamakhy , AzerbaijanB.F HealySchool of Physics and Astronomy, University of Minnesota , Minneapolis, MN 55455 , USAK. E. HeintzCosmic Dawn Center (DAWN) , 2200 Copenhagen , DenmarkP. HelloIJCLab, Univ Paris-Saclay , CNRS/IN2P3 Orsay, 91405 , FranceR. InasaridzeE. Kharadze Georgian National Astrophysical Observatory , Mt. Kanobili, Abastumani 0301, Adigeni , GeorgiaAbdusamatjan IskandarXinjiang Astronomical Observatory (XAO), Chinese Academy of Sciences , Urumqi 830011 , P. R. ChinaН. З. ИсмаиловN. Tusi Shamakhy Astrophysical Observatory, Ministry of Science and Education , settl. Y. Mammadaliyev, AZ-5626 Shamakhy , AzerbaijanL. IzzoDARK, Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N , DenmarkSahil JhawarInstitute for Physics and Astronomy, University of Potsdam , Haus 28, Karl-Liebknecht-Str. 24/25, D-14476 Potsdam , GermanyT Jegou du LazDivision of Physics, Mathematics, and Astronomy, California Institute of Technology , Pasadena, CA 91125 , USATalal M. KamelNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptС. КарповCEICO, Institute of Physics of the Czech Academy of Sciences , Na Slovance 1999/2, CZ-182 21 Praha , Czech RepublicA. KlotzIRAP, Université de Toulouse, CNRS , UPS, 14 Avenue Edouard Belin, F-31400 Toulouse , FranceE. KoulouridisNational Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing , GR-15236 Penteli , GreeceN. P. M. KuinMullard Space Science Laboratory, University College London , Holmbury St. Mary Dorking RH5 6NT , UKN. KochiashviliE. Kharadze Georgian National Astrophysical Observatory , Mt. Kanobili, Abastumani 0301, Adigeni , GeorgiaS. LeoniniKang‐Wei LuYunnan Observatories, Chinese Academy of Sciences , 650011 Kunming, Yunnan Province , P. R. ChinaD. MalesaniCosmic Dawn Center (DAWN) , 2200 Copenhagen , DenmarkM. MašekFZU–Institute of Physics of the Czech Academy of Sciences , Na Slovance 1999/2, CZ-182 21 Praha , Czech RepublicJ. MaoCenter for Astronomical Mega-Science, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, 100012 Beijing , P. R. ChinaA. MelandriINAF–Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC) , ItalyB. MihovInstitute of Astronomy and NAO, Bulgarian Academy of Sciences , 72 Tsarigradsko Chaussee Blvd., 1784 Sofia , BulgariaR. NatsvlishviliE. Kharadze Georgian National Astrophysical Observatory , Mt. Kanobili, Abastumani 0301, Adigeni , GeorgiaFelipe NavareteSOAR Telescope/NSF’s NOIRLab Avda Juan Cisternas 1500 , 1700000 La Serena , ChileVsevolod NedoraMax Planck Institute for Gravitational Physics (Albert Einstein Institute) , Am Mühlenberg 1, D-14476 Potsdam , GermanyJosé M. NicolásObservatoire de la Côte d’Azur, Université Côte d’Azur , Boulevard de l’Observatoire, F-06304 Nice , FranceMohammad OdehObservatoire de la Côte d’Azur, Université Côte d’Azur , Boulevard de l’Observatoire, F-06304 Nice , FranceJ. T. PalmerioGEPI, Observatoire de Paris, Université PSL , CNRS, 5 place Jules Janssen, F-92190 Meudon , FranceP. T. H. PangInstitute for Gravitational and Subatomic Physics (GRASP), Utrecht University , Princetonplein 1, NL-3584 CC Utrecht , the NetherlandsM. de PasqualeMathematics, Informatics, Physics and Earth Science Department , University of Messina, Via F.D. D’Alcontres 31, Polo Papardo, I-98166 Messina , ItalyHuanwei PengPhysics Department, Tsinghua University , Beijing 100084 , P. R. ChinaS PormenteObservatoire de la Côte d’Azur, Université Côte d’Azur , Boulevard de l’Observatoire, F-06304 Nice , FranceJ. PelotonIJCLab, Univ Paris-Saclay , CNRS/IN2P3 Orsay, 91405 , FranceT. PradierUniversité de Strasbourg, CNRS , IPHC UMR 7178, F-67000 Strasbourg , FranceO. PyshnaAstronomical Observatory of Taras Shevchenko National University of Kyiv , Observatorna Str. 3, UA-04053 Kyiv , UkraineY RajabovUlugh Beg Astronomical Institute, Uzbekistan Academy of Sciences , Astronomy Str. 33, Tashkent 100052 , UzbekistanN.A RakotondrainibeAix Marseille Univ, CNRS , CNES, 13388 LAM Marseille , FranceJ-P RivetLaboratoire J.-L. Lagrange, Université de Nice Sophia-Antipolis, CNRS , Observatoire de la Côte d’Azur, F-06304 Nice , FranceL RousselotObservatoire de la Côte d’Azur, Université Côte d’Azur , Boulevard de l’Observatoire, F-06304 Nice , FranceA. SaccardiGEPI, Observatoire de Paris, Université PSL , CNRS, 5 place Jules Janssen, F-92190 Meudon , FranceM. SasakiLaboratório Nacional de Astrofísica - LNA, Rua Estados Unidos , 154 Itajubá - MG CEP 37504-364 , BrazilBenjamin SchneiderKavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Ave, Cambridge, MA 02139 , USAM. SerrauSociété Astronomique de France, Observatoire de Dauban , F-04150 Banon , FranceAzza ShokryNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptL. Slavcheva‐MihovaInstitute of Astronomy and NAO, Bulgarian Academy of Sciences , 72 Tsarigradsko Chaussee Blvd., 1784 Sofia , BulgariaA. SimonAstronomy and Space Physics Department, Taras Shevchenko National University of Kyiv , Glushkova Ave., 4, UA-03022 Kyiv , UkraineO SokoliukAstronomical Observatory of Taras Shevchenko National University of Kyiv , Observatorna Str. 3, UA-04053 Kyiv , UkraineG SrinivasaragavanAstrophysics Science Division, NASA Goddard Space Flight Center , 8800 Greenbelt Rd, Greenbelt, MD 20771 , USAR. StrausbaughDepartment of Physics, Eastern Illinois University , Charleston, IL 61920 , USAA. TakeyNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St., 11421 Helwan, Cairo , EgyptN. R. TanvirDepartment of Physics and Astronomy, University of Leicester , University Road, Leicester LE1 7RH , UKC. C. ThöneAstronomical Institute of the Czech Academy of Sciences (ASU-CAS) , Fricova 298, CZ-251 65 Ondřejov , Czech RepublicYusufjon TillayevNational University of Uzbekistan , Department of Astronomy and Atmospheric Physics, 4 University Str., Tashkent 100174 , Uzbekistan
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Аннотация
ABSTRACT GRB 230812B is a bright and relatively nearby (z = 0.36) long gamma-ray burst (GRB) that has generated significant interest in the community and has thus been observed over the entire electromagnetic spectrum. We report over 80 observations in X-ray, ultraviolet, optical, infrared, and submillimetre bands from the GRANDMA (Global Rapid Advanced Network for Multimessenger Addicts) network of observatories and from observational partners. Adding complementary data from the literature, we then derive essential physical parameters associated with the ejecta and external properties (i.e. the geometry and environment) of the GRB and compare with other analyses of this event. We spectroscopically confirm the presence of an associated supernova, SN2023pel, and we derive a photospheric expansion velocity of v ∼ 17 × 103 km s−1. We analyse the photometric data first using empirical fits of the flux and then with full Bayesian inference. We again strongly establish the presence of a supernova in the data, with a maximum (pseudo-)bolometric luminosity of 5.75 × 1042 erg s−1, at $15.76^{+0.81}_{-1.21}$ d (in the observer frame) after the trigger, with a half-max time width of 22.0 d. We compare these values with those of SN1998bw, SN2006aj, and SN2013dx. Our best-fitting model favours a very low density environment ($\log _{10}({n_{\rm ISM}/{\rm cm}^{-3}}) = -2.38^{+1.45}_{-1.60}$) and small values for the jet’s core angle $\theta _{\rm core} = 1.54^{+1.02}_{-0.81} \ \rm {deg}$ and viewing angle $\theta _{\rm obs} = 0.76^{+1.29}_{-0.76} \ \rm {deg}$. GRB 230812B is thus one of the best observed afterglows with a distinctive supernova bump.
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