Multi-band analyses of the bright GRB 230812B and the associated SN2023pel
Thomas Hussenot-DesenongesIJCLab , Univ Paris-Saclay , CNRS/IN2P3 , Orsay , FranceThibeau WoutersNikhef , Science Park 105 , 1098 XG Amsterdam , The NetherlandsNidhal GuessoumPhysics Department , American University of Sharjah , Sharjah , UAEI AbdiPhysics Department , American University of Sharjah , Sharjah , UAEA AbulwfaNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St. , 11421 Helwan , Cairo , EgyptC. AdamiAix Marseille Univ , CNRS , CNES , LAM Marseille , FranceJ. F. Agüí FernándezTomás AhumadaCahill Center for Astrophysics , California Institute of Technology , Pasadena CA 91125 , USAV. AivazyanSamtskhe-Javakheti State University , Rustaveli Str. 113 , Akhalt- sikhe , 0080 , GeorgiaDalya AklPhysics Department , American University of Sharjah , Sharjah , UAEAnand, S.Cahill Center for Astrophysics , California Institute of Technology , Pasadena CA 91125 , USAChristopher AndradeSchool of Physics and Astronomy , University of Minnesota , Minneapolis , Minnesota 55455 , USAS. AntierObservatoire de la Côte d'Azur , Université Côte d'Azur , Boulevard de l'Observatoire , 06304 Nice , FranceS. A. AtaNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St. , 11421 Helwan , Cairo , EgyptP. D’AvanzoNational Institute for AstrophysicsYosry 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 , Kyiv , 04053 , UkraineS. BasaLaboratoire d’Astrophysique de MarseilleM. BłażekCentro Astronómico Hispano en Andalucía , Observatorio de Calar Alto , Sierra de los Filabres , 04550 Gérgal , Almería , SpainPhilippe BendjoyaLAGRANGE - Joseph Louis LAGRANGE (Boulevard de l'Observatoire B.P. 4229 06304 Nice Cedex 04 - France - France)S. 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 , GreeceMichael BremerInstitut de Radioastronomie MillimétriqueR. BrivioINAF-Osservatorio Astronomico di Brera , Via E. Bianchi 46 , 23807 Merate (LC) , ItalyV. BuatLAM - Laboratoire d'Astrophysique de Marseille (Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13 - France)Mattia BullaО. БурхоновUlugh Beg Astronomical Institute , Uzbekistan Academy of Sciences , Astronomy Str. 33 , Tashkent 100052 , UzbekistanEric BurnsDepartment of Physics & Astronomy , Louisiana State University , Baton Rouge , LA 70803 , USAS. B. CenkoJoint Space-Science Institute , University of Maryland , College Park , MD 20742 , USAW. J. B. CorradiLaboratório Nacional de Astrofísica -LNA , Rua Estados Unidos , 154 Itajubá -MG CEP 37504-364 BrazilCoughlin, M. W.School of Physics and Astronomy , University of Minnesota , Minneapolis , Minnesota 55455 , USAFrédéric DaigneSorbonne Université , CNRS , UMR 7095 , Institut d'Astrophysique de Paris , 98 bis bd Arago , 75014 Paris , FranceTim DietrichInstitute for Physics and Astronomy , University of Potsdam , Haus 28 , Karl-Liebknecht-Str. 24/25 , 14476 Potsdam , GermanyDamien DornicInstitut National de Physique Nucléaire et de Physique des ParticulesJ.-G. DucoinSorbonne Université , CNRS , UMR 7095 , Institut d'Astrophysique de Paris , 98 bis bd Arago , 75014 Paris , FrancePierre-Alexandre DuverneAPC (UMR_7164) - AstroParticule et Cosmologie (APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13 - France)E. 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 , 23807 Merate (LC) , ItalyE. Le Floc’hAstrophysique, Instrumentation et ModélisationM FreebergJ. FynboCosmic Dawn Center (DAWN) , DenmarkD. GötzCEA Paris-Saclay - Etablissement de SaclayE. A. GurbanovHamed, G. M.National Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St. , 11421 Helwan , Cairo , EgyptHasanov, E.B.F HealySchool of Physics and Astronomy , University of Minnesota , Minneapolis , MN 55455 , USAK. E. HeintzCosmic Dawn Center (DAWN) , DenmarkP. HelloCentre Inria de SaclayR. InasaridzeSamtskhe-Javakheti State University , Rustaveli Str. 113 , Akhalt- sikhe , 0080 , GeorgiaAbdusamatjan IskandarXinjiang Astronomical ObservatoryН. З. ИсмаиловL. IzzoINAF-Osservatorio Astronomico di Capodimonte , Salita Moiariello 16 , I-80131 Napoli , ItalySahil JhawarInstitute for Physics and Astronomy , University of Potsdam , Haus 28 , Karl-Liebknecht-Str. 24/25 , 14476 Potsdam , GermanyTheophile Jegou du LazKamel, T. M.National 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. KlotzUniversité de ToulouseE. KoulouridisNational Observatory of Athens , Institute for Astronomy , Astrophysics , Space Applications and Remote Sensing , 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 , People's Republic of ChinaD. MalesaniM. MašekInstitute of Physics of the Slovak Academy of SciencesJ. MaoA. MelandriINAF-Osservatorio Astronomico di Roma , Via di Frascati 33 , I-00040 , Monte Porzio Catone (RM) , ItalyB. MihovInstitute of Astronomy and National Astronomical ObservatoryR. Sh. NatsvlishviliE. Kharadze Georgian National Astrophysical Observatory , Mt. Kanobili , Abastumani , 0301 , Adigeni , GeorgiaFelipe NavareteSOAR Telescope/NSF's NOIRLab Avda Juan Cisternas 1500 , 1700000 , La Serena , Chile 56 GEPI, Observatoire de Paris, Université PSL, CNRS, 5 place Jules Janssen, 92190 Meudon, France 57 University of Messina, Mathematics, Informatics, Physics and Earth Science Department, Via F.D. D'Alcontres 31, Polo Papardo, 98166, Messina, Italy 58 Physics Department, Tsinghua University, Beijing, 100084, People's Republic of China 59 Université de Strasbourg, CNRS, IPHC UMR 7178, 67000 Strasbourg, France 60 Kavli Institute for Astrophysics and Space Research, Mas- sachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA 61 Société Astronomique de France, Observatoire de Dauban, FR 04150 Banon, France 62 Astronomy and Space Physics Department, Taras Shevchenko National University of Kyiv, Glushkova Ave., 4, Kyiv, 03022, Ukraine 63 National Center Junior Academy of Sciences of Ukraine, Dehtiarivska St. 38-44, Kyiv, 04119, Ukraine 64 Main Astronomical Observatory of National AcVsevolod NedoraMax Planck Institute for Gravitational Physics (Albert Einstein Institute) , Am Mühlenberg 1 , 14476 Potsdam , GermanyNicolas, J.Observatoire de la Côte d'Azur , Université Côte d'Azur , Boulevard de l'Observatoire , 06304 Nice , FranceMohammad OdehObservatoire de la Côte d'Azur , Université Côte d'Azur , Boulevard de l'Observatoire , 06304 Nice , FranceJ. T. PalmerioiTelescope , New Mexico Skies Observatory , Mayhill , NM , USAP. T. H. PangNikhef , Science Park 105 , 1098 XG Amsterdam , The NetherlandsM. de PasqualeObservatoire de la Côte d’AzurH. W. PengObservatoire de la Côte d’AzurS PormenteObservatoire de la Côte d'Azur , Université Côte d'Azur , Boulevard de l'Observatoire , 06304 Nice , FranceJ. PelotonIJCLab , Univ Paris-Saclay , CNRS/IN2P3 , Orsay , FranceT. PradieriTelescope , New Mexico Skies Observatory , Mayhill , NM , USAO. PyshnaAstronomical Observatory of Taras Shevchenko National University of Kyiv , Observatorna Str. 3 , Kyiv , 04053 , UkraineY RajabovUlugh Beg Astronomical Institute , Uzbekistan Academy of Sciences , Astronomy Str. 33 , Tashkent 100052 , UzbekistanN.A. RakotondrainibeAix Marseille Univ , CNRS , CNES , LAM Marseille , FranceJ. -P. RivetLaboratoire J.-L. Lagrange , Université de Nice Sophia-Antipolis ,L RousselotObservatoire de la Côte d'Azur , Université Côte d'Azur , Boulevard de l'Observatoire , 06304 Nice , FranceA. SaccardiAIM , 91191 , Gif-sur-Yvette , FranceN. SasakiLaboratório Nacional de Astrofísica -LNA , Rua Estados Unidos , 154 Itajubá -MG CEP 37504-364 BrazilBenjamin SchneiderM. SerrauShokry ANational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St. , 11421 Helwan , Cairo , EgyptL. Slavcheva‐MihovaInstitute of Astronomy and National Astronomical ObservatoryA. SimonObservatoire de la Côte d’AzurO SokoliukAstronomical Observatory of Taras Shevchenko National University of Kyiv , Observatorna Str. 3 , Kyiv , 04053 , UkraineGokul P. SrinivasaragavanAstrophysics Science Division , NASA Goddard Space Flight Center , 8800 Greenbelt Rd , Greenbelt , MD 20771 , USAR. StrausbaughTanvir, N. R.A. TakeyNational Research Institute of Astronomy and Geophysics (NRIAG) , 1 El-marsad St. , 11421 Helwan , Cairo , EgyptC. C. ThöneYusufjon TillayevUlugh Beg Astronomical Institute , Uzbekistan Academy of Sciences , Astronomy Str. 33 , Tashkent 100052 , Uzbekistan
2023en
ABI
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 sub-millimeter bands from the GRANDMA (Global Rapid Advanced Network for Multi-messenger 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 $\sim$ 17$\times10^3$ km s$^{-1}$. We analyze 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 $5.75 \times 10^{42}$ erg/s, at $15.76^{+0.81}_{-1.21}$ days (in the observer frame) after the trigger, with a half-max time width of 22.0 days. We compare these values with those of SN1998bw, SN2006aj, and SN2013dx. Our best-fit 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 $θ_{\rm core} = 1.54^{+1.02}_{-0.81} \ \rm{deg}$ and viewing angle $θ_{\rm obs} = 0.76^{+1.29}_{-0.76} \ \rm{deg}$. GRB 230812B is thus one of the best observed afterglows with a distinctive supernova bump.
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