Browsing by Author "Jakobsson, Páll"

Now showing items 1-3 of 3

    • HI column densities of z > 2 Swift gamma-ray bursts 
      Jakobsson, Páll; Fynbo, Johan P. U.; Ledoux, C.; Vreeswijk, Paul M.; Kann, D. A.; Hjorth, Jens; Priddey, R. S.; Tanvir, N. R.; Reichart, Daniel E.; Gorosabel, Jorge; Klose, Sylvio; Watson, Darach; Sollerman, J.; Fruchter, Andrew S.; Ugarte Postigo, A. de; Wiersema, K.; Bjornsson, G.; Chapman, R.; Thone, C. C.; Pedersen, K.; Jensen, Brian L. (EDP SCIENCES S A, 2006-12)
      Context. Before the launch of the Swift satellite, the majority of the gamma-ray burst (GRB) afterglows for which Lya was redshifted into the observable spectrum showed evidence for a damped Lya absorber. This small sample ...
    • No supernovae associated with two long-duration gamma-ray bursts 
      Fynbo, Johan P. U.; Watson, Darach; Thöne, Christina C.; Sollerman, Jesper; Bloom, Joshua S.; Davis, Tamara M.; Hjorth, Jens; Jakobsson, Páll; Jørgensen, Uffe G.; Graham, John F.; Fruchter, Andrew S.; Bersier, David; Kewley, Lisa; Cassan, Arnaud; Castro Cerón, José María; Foley, Suzanne; Gorosabel, Javier; Hinse, Tobias C.; Horne, Keith D.; Jensen, Brian L.; Klose, Sylvio; Kocevski, Daniel; Marquette, Jean-Baptiste; Perley, Daniel; Ramírez Ruiz, Enrico; Stritzinger, Maximilian D.; Vreeswijk, Paul M.; Wijers, Ralph A. M.; Woller, Kristian G.; Xu, Dong; Zub, Marta (NATURE PUBLISHING GROUP, 2006-12-21)
      It is now accepted that long-duration gamma-ray bursts (GRBs) are produced during the collapse of a massive star(1,2). The standard 'collapsar' model(3) predicts that a broad-lined and luminous type Ic core-collapse supernova ...
    • Probing cosmic chemical evolution with gamma-ray bursts: GRB 060206 at z=4.048 
      Fynbo, Johan P. U.; Starling, R. L. C.; Ledoux, C.; Wiersema, K.; Thöne, C. C.; Sollerman, J.; Jakobsson, Páll; Hjorth, Jens; Watson, Darach; Vreeswijk, Paul M.; Møller, P.; Rol, E.; Gorosabel, Jorge; Näränen, J.; Wijers, Ralph A. M.; Björnsson, G.; Castro Cerón, José María; Curran, P.; Hartmann, D. H.; Holland, S. T.; Jensen, Brian L.; Levan, A. J.; Limousin, M.; Kouveliotou, C.; Nelemans, G.; Pedersen, K.; Priddey, R. S.; Tanvir, N. R. (EDP SCIENCES S A, 2006-06)
      Aims. We present early optical spectroscopy of the afterglow of the gamma-ray burst GRB060206 with the aim of determining the metallicity of the GRB absorber and the physical conditions in the circumburst medium. We also ...