Výsledky vyhledávání

Report

Variable polarization in the optical afterglow of GRB 021004

Publikováno v: Astron.Astrophys.405:L23-L28,2003

We present polarimetric observations of the afterglow of gamma-ray burst (GRB) 021004, obtained with the Nordic Optical Telescope (NOT) and the Very Large Telescope (VLT) between 8 and 17 hours after the burst. Comparison among the observations shows

Externí odkaz: http://arxiv.org/abs/astro-ph/0305227

Zobrazit plný text záznamu

Report

Ly-alpha emission from GRB host galaxies

Autor: Fynbo, J. P. U., Moller, P., Thomsen, B., Hjorth, J., Gorosabel, J., Andersen, M. I., Egholm, M. P., Holland, S., Jensen, B. L, Pedersen, H., Weidinger, M.

Ly-alpha emission is indicative of on-going star formation in a dust-poor environment. Ly-alpha imaging is therefore a probe of the star formation rate and of the dust-content of Gamma-Ray Burst host galaxies. Both of these parameters are central to

Externí odkaz: http://arxiv.org/abs/astro-ph/0301198

Zobrazit plný text záznamu

Report

Optical Photometry of GRB 021004: The First Month

Publikováno v: Astron.J. 125 (2003) 2291-2298

We present U,B,V,R_C,and I_C photometry of the optical afterglow of the gamma-ray burst GRB 021004 taken at the Nordic Optical Telescope between approximately eight hours and 30 days after the burst. This data is combined with an analysis of the 87 k

Externí odkaz: http://arxiv.org/abs/astro-ph/0211094

Zobrazit plný text záznamu

Report

Absorption Systems in the Spectrum of GRB 021004

Autor: Møller, P., Fynbo, J. P. U., Hjorth, J., Thomsen, B., Egholm, M. P., Andersen, M. I., Gorosabel, J., Holland, S. T., Jakobsson, P., Jensen, B. L., Pedersen, H., Pedersen, K., Weidinger, M.

Publikováno v: Astron.Astrophys. 396 (2002) L21-L24

We report on a 3600 s spectrum of GRB 021004 obtained with the Nordic Optical Telecope on La Palma 10.71 hours after the burst. We identify absorption lines from five systems at redshifts 1.3806, 1.6039, 2.2983, 2.3230, and 2.3292. In addition we fin

Externí odkaz: http://arxiv.org/abs/astro-ph/0210654

Zobrazit plný text záznamu

Report

Constraints on (Omega_m,Omega_Lambda) using distributions of inclination angles for high redshift filaments

Autor: Weidinger, M., Moller, P., Fynbo, J. P. U., Thomsen, B., Egholm, M. P.

Publikováno v: Astron.Astrophys. 391 (2002) 13-20

In this paper we present a scale free method to determine the cosmological parameters (Omega_m, Omega_Lambda). The method is based on the requirement of isotropy of the distribution of orientations of cosmological filaments. The current structure for

Externí odkaz: http://arxiv.org/abs/astro-ph/0205425

Zobrazit plný text záznamu

Report

Deep Ly-alpha imaging of two z=2.04 GRB host galaxy fields

Autor: Fynbo, J. P. U., Moller, P., Thomsen, B., Hjorth, J., Gorosabel, J., Andersen, M. I., Egholm, M. P., Holland, S., Jensen, B. L., Pedersen, H., Weidinger, M.

Publikováno v: Astron.Astrophys. 388 (2002) 425-438

We report on the results of deep narrow-band Ly-alpha, U and I imaging of the fields of two GRBs at z=2.04 (GRB 000301C and GRB 000926). We find that the host galaxy of GRB 000926 is an extended, strong Ly-alpha emitter with a rest-frame equivalent w

Externí odkaz: http://arxiv.org/abs/astro-ph/0203245

Zobrazit plný text záznamu

Report

The optical afterglow and host galaxy of GRB 000926

Autor: Fynbo, J. P. U., Gorosabel, J., Moller, P., Hjorth, J., Andersen, M. I., Egholm, M. P., Jensen, B. L., Pedersen, H., Thomsen, B., Weidinger, M.

In this paper we illustrate with the case of GRB 000926 how Gamma Ray Bursts (GRBs) can be used as cosmological lighthouses to identify and study star forming galaxies at high redshifts. The optical afterglow of the burst was located with optical ima

Externí odkaz: http://arxiv.org/abs/astro-ph/0110603

Zobrazit plný text záznamu