[vsnet-grb-info 9137] GRB 100418A: Gemini-N redshift confirmation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  10624
SUBJECT: GRB 100418A: Gemini-N redshift confirmation
DATE:    10/04/19 14:51:54 GMT
FROM:    Antonino Cucchiara at PSU  <cucchiara at astro.psu.edu>

A. Cucchiara and D. B. Fox (PSU) report on behalf of a
larger collaboration:

"Starting on 2010 April 19.41 UT we used the GMOS spectrograph
on the Gemini North 8-m telescope to observe the field of the
Swift GRB 100418A (Marshall et al. GCN 10612).

A sequence of 2x1200s spectra were obtained covering the
spectral range of 4000-8000A.

A series of metal absorption features were identified (MgII2796,
2803,FeI3720, Ca H&K, CaI4227) and H-beta in emission at the
common redshift of z= 0.624, confirming the previously reported
result of Antonelli et al. GCN 10620.


We thank the Gemini staff for performing this observation,
in particular A. Fritz."