VLT/X-shooter spectroscopy of the GRB 090926A afterglow

Details VLT/X-shooter spectroscopy of the GRB 090926A afterglow VLT/X-shooter spectroscopy of the GRB 090926A afterglow

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1279..163d&link_type=abstract

DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings, Volume 1279, pp. 163-166 (2010).

Astronomy and Astrophysics

Astronomy

Gamma-Ray Sources (Astronomical), Interstellar Matter, Galaxies, Redshift, Gamma-Ray Sources, Gamma-Ray Bursts, Physical Properties, Interacting Galaxies, Galaxy Pairs, And Triples, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies

Scientific paper

We study the environment and intervening absorbers of the gamma-ray burst GRB 090926A through analysis of X-shooter optical spectra of its afterglow taken ~22 hr after the trigger. The spectrum shows that the ISM in the GRB host galaxy at z = 2.1071 is rich in absorption features, with two components contributing to the line profiles. In addition to the ground state lines, we detect several excited absorption features. No host galaxy emission lines, molecular absorption features nor diffuse interstellar bands are detected in the spectrum. The line of sight of GRB 090926A presents four weak intervening absorption systems in the redshift range 1.24

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