[AAVSO-HEN] GRB 060206: Spectroscopic Redshift

[grb at aavso.org]

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TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4692
SUBJECT: GRB 060206: Spectroscopic Redshift
DATE:    06/02/06 09:34:16 GMT
FROM:    Johan U. Fynbo at U.Copenhagen  <jfynbo at astro.ku.dk>

Johan P. U. Fynbo, Marceau Limousin, José María Castro Cerón,
Brian L. Jensen (DARK Cosmology Centre), Jyri Näränen (Helsinki
Observatory) report on behalf of a larger collaboration:

"From the calibrated ALFOSC spectrum of the afterglow of GRB 060206
(GCN #4682, #4683, #4684, #4686) we measure a redshift of
z=4.045 based on Lyman-alpha, SiII, SiII*, OI, CII and SiIV
among other lines. Our previous estimate was off due to a
calculation error for which we apologise."