GRB 050509B: Constraints on short gamma-ray burst models

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dc.creatorHjorth, J.
dc.creatorSollerman, J.
dc.creatorGorosabel, J.
dc.creatorGranot, J.
dc.creatorKlose, S.
dc.creatorKouveliotou, C.
dc.creatorMelinder, J.
dc.creatorRamirez-Ruiz, E.
dc.creatorStarling, R.
dc.creatorThomsen, B.
dc.creatorAndersen, M. I.
dc.creatorFynbo, J. P. U.
dc.creatorJensen, B. L.
dc.creatorVreeswijk, P. M.
dc.creatorCerón, J. M. Castro
dc.creatorJakobsson, P.
dc.creatorLevan, A.
dc.creatorPedersen, K.
dc.creatorRhoads, J. E.
dc.creatorTanvir, N. R.
dc.creatorWatson, D.
dc.creatorWijers, R. A. M. J.
dc.date2005-06-06
dc.date2005-08-01
dc.date.accessioned2026-07-07T11:57:12Z
dc.date.available2026-07-07T11:57:12Z
dc.descriptionWe have obtained deep optical images with the Very Large Telescope at ESO of the first well-localized short-duration gamma-ray burst, GRB 050509B. From V and R imaging, initiated ~2 days after the GRB trigger and lasting up to three weeks, we detect no variable object inside the small Swift/XRT X-ray error circle down to 2sigma limits of V = 26.5 and R = 25.1. The X-ray error circle includes a giant elliptical galaxy at z = 0.225, which has been proposed as the likely host of this GRB. Our limits indicate that if the GRB originated at z = 0.225, any supernova-like event accompanying the GRB would have to be over 100 times fainter than normal Type Ia SNe or Type Ic hypernovae, 5 times fainter than the faintest known Ia or Ic SNe, and fainter than the faintest known Type II SNe. Moreover, we use the optical limits to constrain the energetics of the GRB outflow. Simple models indicate that, unless the intrinsic energy in the outflow from GRB 050509B was << 10^51 erg, there was very little radioactive material with efficient decay timescales for generating a large luminosity. These limits strongly constrain progenitor models for this short GRB.
dc.description13 pages, 2 figures, ApJL, in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0506123
dc.identifierhttp://arxiv.org/abs/astro-ph/0506123
dc.identifierAstrophys.J.630:L117-L120,2005
dc.identifierdoi:10.1086/491733
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205799
dc.subjectAstrophysics
dc.titleGRB 050509B: Constraints on short gamma-ray burst models
dc.typetext

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