Absorption systems in the spectrum of GRB 021004

P. Moller; J. Fynbo; J. Hjorth; B. Thomsen; M.P. Egholm; M.I. Andersen; J. Gorosabel; S.T. Holland; P. Jakobsson; B.L. Jensen; H. Pedersen; K. Pedersen; M. Weidinger

doi:10.1051/0004-6361:20021612

Absorption systems in the spectrum of GRB 021004

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

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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 Ly 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 Ly and Lyman-Break galaxies at similar redshifts. The emission line flux is 2:46 0:50 10−16 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.

Original language	English
Pages (from-to)	L21-L24
Journal	Astronomy and Astrophysics
Volume	396
DOIs	https://doi.org/10.1051/0004-6361:20021612
Publication status	Published - 2002

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@article{f0d6c04e12aa4ce890a85bbef356c74c,

title = "Absorption systems in the spectrum of GRB 021004",

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 Ly 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 Ly and Lyman-Break galaxies at similar redshifts. The emission line flux is 2:46 0:50 10−16 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.",

author = "P. Moller and J. Fynbo and J. Hjorth and B. Thomsen and M.P. Egholm and M.I. Andersen and J. Gorosabel and S.T. Holland and P. Jakobsson and B.L. Jensen and H. Pedersen and K. Pedersen and M. Weidinger",

note = "Original article can be found at: http://www.aanda.org/--Copyright The European Southern Observatory (ESO) DOI : 10.1051/0004-6361:20021612",

year = "2002",

doi = "10.1051/0004-6361:20021612",

language = "English",

volume = "396",

pages = "L21--L24",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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TY - JOUR

T1 - Absorption systems in the spectrum of GRB 021004

AU - Moller, P.

AU - Fynbo, J.

AU - Hjorth, J.

AU - Thomsen, B.

AU - Egholm, M.P.

AU - Andersen, M.I.

AU - Gorosabel, J.

AU - Holland, S.T.

AU - Jakobsson, P.

AU - Jensen, B.L.

AU - Pedersen, H.

AU - Pedersen, K.

AU - Weidinger, M.

N1 - Original article can be found at: http://www.aanda.org/--Copyright The European Southern Observatory (ESO) DOI : 10.1051/0004-6361:20021612

PY - 2002

Y1 - 2002

N2 - 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 Ly 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 Ly and Lyman-Break galaxies at similar redshifts. The emission line flux is 2:46 0:50 10−16 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.

AB - 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 Ly 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 Ly and Lyman-Break galaxies at similar redshifts. The emission line flux is 2:46 0:50 10−16 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.

U2 - 10.1051/0004-6361:20021612

DO - 10.1051/0004-6361:20021612

M3 - Article

SN - 0004-6361

VL - 396

SP - L21-L24

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Absorption systems in the spectrum of GRB 021004

Abstract

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