[vsnet-grb-info 6167] GRB 080603B: BOOTES2/TELMA optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7796
SUBJECT: GRB 080603B: BOOTES2/TELMA  optical observations
DATE:    08/06/03 22:44:26 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct at iaa.es>

A. J. Castro-Tirado, M. Jelinek, J. Gorosabel (IAA-CSIC Granada), P.
Kubánek (GACE, U. Valencia), S. Vitek (CVUT Praha), A. de Ugarte Postigo
(ESO Santiago), R. Cunniffe (Cork Univ.), R. Fernández-Muñoz (EELM-CSIC
La Mayora), P. Martín-Almendros (Fundación Málaga) and L. Sabau-Graziati
(INTA Madrid), report:

"We are observing the field of GRB 080603B (Mangano et al. GCN 7794)
with the recently installed 60cm robotic telescope BOOTES-2/TELMA in
Málaga (south Spain). The first observations (120s each, with the
r'-band filter) were obtained starting at 20:31 UT (i.e. 51 min after
the onset of the event). We detect the optical afterglow (Rujopakarn et
al. GCN 7792, Mangano et al.) with 17.3 mag, based on a preliminary
calibration using USNO-A2.0. We also confirm the early plateau phase
reported by Klotz et al.(GCNC 7795). From our last frame taken at 22:30
UT we derive a 0.3 mag decay. Further images (in g'r'i'Z filters) are
on their way. Spectroscopic observations are encouraged."

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