[vsnet-grb-info 2114] GRB050908: VLT R-band decay index.

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3953
SUBJECT: GRB050908: VLT R-band decay index.
DATE:    05/09/08 18:09:26 GMT
FROM:    Angelo Antonelli at Obs. Astro. di Roma  <a.antonelli at mporzio.astro.it>

S. Piranomonte, L. Calzoletti (INAF/OAR), P. D'Avanzo (INAF/OABr),   
L.A. Antonelli (INAF/OAR), N. Patat, C. Ledoux (ESO), D. Malesani 
(SISSA/ISAS), G. Chincarini  (INAF/OABr & Univ. Milano-Bicocca), S. 
Covino, D. Fugazza, G. Tagliaferri(INAF/OABr), F. Fiore and L.  Stella 
(INAF/OAR), report on behalf of the MISTICI collaboration:

"We observed the optical afterglow (Torii, GCN 3943; Cenko, Fox &  
Berger, GCN 3944) of GRB 050908 (Goad et al., GCNs 3942, 3946) with the 
  ESO-VLT UT2, equipped with the FORS1 instrument. R-band observations  
were performed in Rapid Response Mode (RRM) on Sep 8.268 UT and as a 
ToO on Sept 8.415 UT (42 and 255 minutes after the GRB respectively).  
During the two epoch observations the afterglow decays as a power law 
having decay index of -0.93+/-0.05.

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