Absorption systems in the spectrum of GRB 021004
Open Access
- 3 December 2002
- journal article
- letter
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 396 (2) , L21-L24
- https://doi.org/10.1051/0004-6361:20021612
Abstract
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 find an emission line which, if due to Lyα from the host galaxy, gives a redshift of 2.3351. The nearest absorber is blueshifted by 530 km s-1 with respect to this line, consistent with shifts seen in Damped Lyα and Lyman-Break galaxies at similar redshifts. The emission line flux is erg s-1 cm-2. Some of the absorption systems are “line-locked”, an effect often seen in QSO absorption systems believed to originate close to the QSO central engine.Keywords
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This publication has 16 references indexed in Scilit:
- The afterglow of GRB 021004: Surfing on density wavesAstronomy & Astrophysics, 2002
- Time‐dependent Optical Spectroscopy of GRB 010222: Clues to the Gamma‐Ray Burst EnvironmentThe Astrophysical Journal, 2002
- Line‐driven Winds, Ionizing Fluxes, and Ultraviolet Spectra of Hot Stars at Extremely Low Metallicity. I. Very Massive O StarsThe Astrophysical Journal, 2002
- Deep Lyαimaging of two ${\vec{z}}$ = 2.04 GRB host galaxy fieldsAstronomy & Astrophysics, 2002
- LIPIDS | Fat Globules in MilkPublished by Elsevier ,2002
- The afterglow of the short/intermediate-duration gamma-ray burst GRB 000301C: A jet at $\mathsf{{\vec z}=2.04}$Astronomy & Astrophysics, 2001
- [ITAL]Hubble Space Telescope[/ITAL] Space Telescope Imaging Spectrograph Imaging of the Host Galaxy of GRB 980425/SN 1998[CLC]bw[/CLC]The Astrophysical Journal, 2000
- Environment of the Gamma-Ray Burst GRB 971214: A Giant H [CSC]ii[/CSC] Region Surrounded by a Galactic SupershellThe Astrophysical Journal, 2000
- Multiline transfer and the dynamics of Wolf-Rayet windsThe Astrophysical Journal, 1993
- The complex absorption spectrum of the broad absorption line QSO 1303 + 308The Astrophysical Journal, 1987