GCN Circular 23629
Subject
GRB 190106A: update of the Xinglong-2.16m spectroscopy
Event
Date
2019-01-07T05:25:15Z (7 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu, Z.P. Zhu, Y. Wang, J.B. Zhang (NAOC), J.H. Liu, X. Zhang (XAO)
report:
We have re-reduced the 3600s+3000s spectra taken from the Xinglong-2.16m
telescope (Zhu et al., GCN 23623), with the calibration frames taken in
the same night. The Signal-to-Noise of the spectrum increased compared
with the previous 3600s one, and the resolution is not high due to
seeing~2.0".
We only consider relatively prominent absorption features and thus only
six features are left, which can be interpreted as C IV 1547.62, 1550.19,
Fe II 2585.88, 2599.40, and Mg II doublet 2795.53, 2802.71
(wavelength in air), at an updated and consistent redshift of z=1.86.
[GCN OPS NOTE(08jan19): Per author's request, In the SUBJECT-line,
the "180106A" was changed to "190106A". And the
"Fe II 1547.62, 1550.19, 2585.88, 2599.40, and Mg II doublet 2795.53, 2802.71" was changed to
"C IV 1547.62, 1550.19, Fe II 2585.88, 2599.40, and Mg II doublet 2795.53, 2802.71".]