Probing gamma-ray burst environments with time variability: ULTRASPEC fast imaging of GRB 080210★

Autor: P. M. Vreeswijk, Robert Chapman, Pall Jakobsson, C. Ledoux, Alain Smette, J. P. U. Fynbo, Gunnlaugur Björnsson, A. De Cia, Tayyaba Zafar, D. Malesani, T. R. Marsh, V. S. Dhillon, Steve Schulze, Einar H. Gudmundsson, S. P. Littlefair

Publikováno v: Monthly Notices of the Royal Astronomical Society. 412:2229-2240

We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.45 min. The light curve is smooth on both short (down to 2.18 s) and l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d1f86f0de5089fb14ebaae45ccd64c4a
https://doi.org/10.1111/j.1365-2966.2010.18046.x

Comparison of mothers’ and fathers’ ratings of their children’s verbal and motor development

Autor: Sigurdur J. Gretarsson, Einar H. Gudmundsson

Publikováno v: Nordic Psychology. 61:14-25

To compare developmental ratings of mothers and fathers, 58 couples, parents of four year olds, mothers and fathers rated separately their children’s development on a 190-item eightsubtest inventor...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf56753b7a60f717a89eb93b3acd5fb6
https://doi.org/10.1027/1901-2276.61.1.14

Energy Injection in Gamma‐Ray Burst Afterglow Models

Autor: Gunnlaugur Björnsson, Gudlaugur Johannesson, Einar H. Gudmundsson

Publikováno v: The Astrophysical Journal. 647:1238-1249

We extend the standard fireball model, widely used to interpret gamma-ray burst (GRB) afterglow light curves, to include energy injections, and apply the model to the afterglow light curves of GRB 990510, GRB 000301C and GRB 010222. We show that disc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad05450f63a9dd2a053d2ac85ae38546
https://doi.org/10.1086/505520

Ly+ and ultraviolet emission from high-redshift gamma-ray burst hosts: to what extent do gamma-ray bursts trace star formation?

Autor: Einar H. Gudmundsson, Jens Hjorth, B. Thomsen, J. P. U. Fynbo, G. Östlin, Gunnlaugur Björnsson, J. Gorosabel, Palle Møller, Gudlaugur Johannesson, Dan M. Watson, P. Jakobsson, B. L. Jensen

Publikováno v: Jakobsson, P, Björnsson, G, Fynbo, J P U, Jóhannesson, G, Hjorth, J, Thomsen, B, Møller, P, Watson, D, Jensen, B L, Östlin, G, Gorosabel, J & Gudmundsson, E H 2005, ' Ly+ and ultraviolet emission from high-redshift gamma-ray burst hosts: to what extent do gamma-ray bursts trace star formation ? ', Royal Astronomical Society. Monthly Notices, vol. 362, pp. 245-251 .

We report the result of a search for Ly-alpha emission from the host galaxies of the gamma-ray bursts (GRBs) 030226 (z = 1.986), 021004 (z = 2.335) and 020124 (z = 3.198). We find that the host galaxy of GRB 021004 is an extended (around 8 kpc) stron

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https://doi.org/10.1111/j.1365-2966.2005.09289.x

Depletion of background galaxies owing to the cluster lens CL0024+1654: U- and R-band observations

Autor: E. van Kampen, Thomas R. Greve, Andreas O. Jaunsen, Jens Hjorth, Andy Taylor, Lars Lindberg Christensen, O. E. Rognvaldsson, Pall Jakobsson, V. S. Sigmundsson, Einar H. Gudmundsson

Publikováno v: Monthly Notices of the Royal Astronomical Society. 322:131-140

We have obtained U and R band observations of the depletion of background galaxies due to the gravitational lensing of the galaxy cluster CL0024+1654 (z=0.39). The radial depletion curves show a significant depletion in both bands within a radius of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de41c516489f5deeec0abb0efba17432
https://doi.org/10.1046/j.1365-8711.2001.04066.x