TITLE:   GCN CIRCULAR
NUMBER:  5937
SUBJECT: GRB 061218: REM prompt observations
DATE:    06/12/18 05:17:33 GMT
FROM:    Paolo D'Avanzo at INAF-OAB  <paolo.davanzo@brera.inaf.it>

P. D'Avanzo, S. Covino, E. Molinari, G. Chincarini, F.M. Zerbi, V.  
Testa, G. Tosti, F. Vitali, P. Conconi, L.A. Antonelli, G. Cutispoto,  
G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs, and P. Goldoni  report 
on behalf of the REM/ROSS team


We observed the field of the possible GRB 061218 (Zane et al. GCN 5936) with  
the robotic 60-cm REM telescope located at La Silla (Chile). A set of 
observations was performed automatically in the optical and near  
infrared filters (V, R, I and J, H, K, z) starting on 2006 December  18 
at 04:07:14 UT, 71 s after the BAT trigger and 129 s after the GRB  time.

Preliminary analysis of the whole dataset does not show any new  
variable source inside the BAT error box.

The 3-sigma limiting magnitudes are:

   R~18.6
   J~16.7
   H~16.0
   K~15.3

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