TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5218
SUBJECT: GRB 060604: redshift
DATE:    06/06/05 12:24:51 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>

A. J. Castro-Tirado, P. Amado (IAA-CSIC Granada),
I. Negueruela (U. de Alicante), J. Gorosabel, M. Jelínek
and A. de Ugarte Postigo (IAA-CSIC),

report:

"We have observed the optical afterglow of GRB 060604 (Page et al.
GCN Circ. 5212) with the 2.5m Nordic Optical telescope (+ALFOSC) 
at Observatorio del Roque de los Muchachos (La Palma). Observations 
consisted of a 150 s V-band exposure with showed a faint object at 
the location of the proposed Swift/UVOT candidate, in agreement with
Tanvir et al. (GCN Circ. 5216), plus a 1200 s exposure spectrum 
covering the range 3200-9100 A with the grism#4. Based on the presence 
of a strong continuum break around 4475 A which we identify as due to 
Ly-alpha, we estimate a redshift of z = 2.68. Further analysis is in 
progress"

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