Maqola

GRB 130831A: Rise and demise of a magnetar at z = 0.5

M. de PasqualeMullard Space Science Laboratory, University College London, Dorking, RH5 6NT, United KingdomMathew PageMullard Space Science Laboratory, University College London, Dorking, RH5 6NT, United KingdomSilvia ZaneMullard Space Science Laboratory, University College London, Dorking, RH5 6NT, United KingdomA. A. BreeveldMullard Space Science Laboratory, University College London, Dorking, RH5 6NT, United KingdomS. R. OatesIstituto de Astrofisica de Andalucia (CSIC) Granada, E-18008, SpainA. J. Castro‐TiradoIstituto de Astrofisica de Andalucia (CSIC) Granada, E-18008, SpainJavier GorosabelIstituto de Astrofisica de Andalucia (CSIC) Granada, E-18008, SpainJ. L. RacusinCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAE. TrojaCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAAntonino CucchiaraCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAA. Y. LienCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAN. GehrelsCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAH. MoseleyCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAA. KutyrevCenter for Research and Exploration in Space Science And Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt, MD 20771, USAД. А. КаннThüringer Landessternwarte Tautenburg, Sternwarte 5, Tautenburg, 07778, GermanyBing ZhangDepartment of Physics and Astronomy, University of Nevada, Las Vegas Las Vegas, 89119, Nevada, USAA. PozanenkoSpace Research Institute (IKI) Moscow, 117997, RussiaA. VolnovaSpace Research Institute (IKI) Moscow, 117997, RussiaA. TrotterUniversity of North Carolina at Chapel Hill Chapel Hill, NC 27599, USANathan R. FrankUniversity of North Carolina at Chapel Hill Chapel Hill, NC 27599, USAD. ReichartUniversity of North Carolina at Chapel Hill Chapel Hill, NC 27599, USAJ. HaislipUniversity of North Carolina at Chapel Hill Chapel Hill, NC 27599, USAB. SbarufattiPennsylvania State University University Park, PA 16802, USANathaniel ButleArizona State University, Tempe, AZ 85281, USAO. LittlejohnsArizona State University, Tempe, AZ 85281, USAS. SchulzeInstituto de Astrof’sica, Pontificia Universidad Católica de Chile, Vicña Mackenna 4860, Santiago, 7820436 Macul, ChileZ. CanoCentre for Astrophysics and Cosmology, Science Institute, University of Iceland, 107 Reykjavik, IcelandO. FoxUniversity of California Berkeley Berkeley, CA94720, USAJ. S. BloomUniversity of California Berkeley Berkeley, CA94720, USAJ. X. ProchaskaUniversity of California Santa Cruz, USA Santa Cruz, CA95064, USAJ. A. de DiegoInstituto de Astronomía, Universidad Nacional Autonoma de México, Apartado Postal 70-264, Mexico, DF 04510, MexicoJ. González‐HernándezInstituto de Astronomía, Universidad Nacional Autonoma de México, Apartado Postal 70-264, Mexico, DF 04510, MexicoA. M. WatsonInstituto de Astronomía, Universidad Nacional Autonoma de México, Apartado Postal 70-264, Mexico, DF 04510, MexicoM. G. RicherInstituto de Astronomía, Universidad Nacional Autonoma de México, Apartado Postal 106, Baja California, 22800 Ensenada, MexicoC. Román-ZúñigaInstituto de Astronomía, Universidad Nacional Autonoma de México, Apartado Postal 106, Baja California, 22800 Ensenada, MexicoVivian L. HoetteThe University of Chicago Chicago, IL 60637, USAR. R. RussellThe University of Chicago Chicago, IL 60637, USAV. RumyantsevCrimean Astrophysical Observatory, 98409, pgt. Nauchny, CrimeaE. KlunkoInstitute of Solar-Terrestrial Physics, Russian Academy of Sciences, Lermontov st., 126a, Irkutsk, p/o box 291, 664033, RussiaО. БурхоновUlugh Beg Astronomical Institute, 33 Astronomicheskaya str., Tashkent, 100052, Uzbekistan

2017en

ABI

Annotatsiya

Gamma-ray bursts (GRBs) are the brightest explosions in the universe, yet the properties of their energy sources are far from understood. Very important clues, however, can be deduced by studying the afterglows of these events. We present observations of GRB 130831A and its afterglow obtained with Swift, Chandra, and multiple ground-based observatories. This burst shows an uncommon drop in the X-ray light curve at about 100 ks after the trigger, with a decay slope of α 7. The standard Forward Shock (FS) model offers no explanation for such a behaviour. Instead, a model in which a newly born magnetar outflow powers the early X-ray emission is found to be viable. After the drop, the X-ray afterglow resumes its decay with a slope typical of FS emission. The optical emission, on the other hand, displays no clear break across the X-ray drop and its decay is consistent with that of the late X-rays. Using both the X-ray and optical data, we show that the FS model can explain the emission after 100 ks. We model our data to infer the kinetic energy of the ejecta and thus estimate the efficiency of a magnetar “central engine” of a GRB. Furthermore, we break down the energy budget of this GRB into prompt emission, late internal dissipation, kinetic energy of the relativistic ejecta, and compare it with the energy of the accompanying supernova, SN 2013fu.

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Mavzular

Gamma-ray bursts and supernovae Astro and Planetary Science

Identifikatorlar

DOI: 10.1142/9789813226609_0375

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