GCN Circular 9673
Subject
GRB090715B: WHT redshift
Date
2009-07-16T05:19:03Z (16 years ago)
From
Klaas Wiersema at U of Leicester <kw113@star.le.ac.uk>
K. Wiersema (Leicester), A. Levan (Warwick), A. Kamble (Amsterdam), N.
Tanvir (Leicester) and D. Malesani (DARK/NBI) report on behalf of a larger
collaboration:
We observed the afterglow of GRB090715B (Vetere et al, GCN 9668; Smith et
al GCN9 670) with the William Herschel Telescope, using the ISIS
spectrograph. Exposure times were 3 x 900 seconds with the R300B and R316R
grisms in the blue and red arm respectively, starting at 23:46 UT. We
detect a multitude of lines, including Lyman alpha, Lyman beta, SiII and
SII at redshift z=3.00.
We thank T. Ottosen for acquiring this dataset.