GCN Circular 974
Subject
GRB010222: Another absorption line system
Date
2001-02-23T05:14:40Z (24 years ago)
From
Saurabh Jha at Harvard-Smithsonian CfA <sjha@cfa.harvard.edu>
S. Jha, T. Matheson, M. Calkins, M. A. Pahre, K. Z. Stanek,
J. McDowell, R. Kilgard (Harvard-Smithsonian CfA), and
P. M. Garnavich (Notre Dame) report:
Further reduction and analysis of the FLWO 1.5m spectrum of the GRB
010222 optical afterglow (GCN 965) reveals the presence of two
absorption systems along the line of sight to the gamma-ray burst, one
at z = 1.477 as reported, and another with weaker lines at z = 1.157.
The interstellar absorption lines observed from each system are as
follows, with identifications based on the ultraviolet spectral atlas
of Blades et al. (1988, ApJ, 334, 308):
Observed Line Rest Redshift
Wavelength Identification Wavelength
(A) (A)
7065.4 Mg I 2852.1 1.477
6941.7 Mg II 2802.7 1.477
6924.0 Mg II 2795.5 1.477
6438.5 Fe II 2599.4 1.477
6422.4 Mn II 2593.7 1.476
6405.4 Fe II 2585.9 1.477
6381.2 Mn II 2576.1 1.477
5900.1 Fe II 2382.0 1.477
5879.6 Fe II 2373.7 1.477
5805.4 Fe II 2343.5 1.477
5108.5 Zn II/Cr II blend 2061.9 1.478
5018.5 Zn II/Mg I blend 2025.6 1.478
4478.9 Si II 1808.0 1.477
4137.8 Al II 1670.8 1.477
3838.0 C IV blend 1549.0 1.478
3781.8 Si II 1526.7 1.477
6045.0 Mg II 2802.7 1.157
6028.2 Mg II 2795.5 1.156
5606.7 Fe II 2599.4 1.157
5574.1 Fe II 2585.9 1.156
5137.2 Fe II 2382.0 1.157
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