TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2511
SUBJECT: GRB040106: optical observations with REM+ROSS
DATE:    04/01/07 15:38:38 GMT
FROM:    Nicola Masetti at IASF,CNR,Bologna  <masetti@bo.iasf.cnr.it>

E. Palazzi, N. Masetti, F.M. Zerbi, E. Molinari, G. Tosti, G. Chincarini, 
S. Covino, A. Di Paola, D. Fugazza, V. Testa, M. Rodono', L.A. Antonelli, 
P. Conconi, G. Cutispoto, L. Nicastro, L. Burderi, S. Campana, C. Campeggi, 
G. Crimi, R. Cunniffe, J. Danzinger, A. Fernandez-Soto, F. Fiore, 
F. Frontera, G. Gentile, G. Ghisellini, P. Goldoni, G. Israel, B. Jordan, 
D. Lazzati, D. Lorenzetti, D. Malesani, E. Martinetti, R. Mazzoleni, 
B. Mc Breen, A. Melandri, S. Messina, E. Meurs, A. Monfardini, 
G. Nucciarelli, M. Orlandini, J. Paul, E. Pian, P. Saracco, S. Sardone, 
A. Simoncelli, M. Stefanon, L. Stella, L. Tagliaferri, M. Tavani, S. Vergani
and F. Vitali, report:

"The REM telescope, currently in commissioning phase, observed the whole 
error box of the INTEGRAL GRB 040106 (Mereghetti et al., GCN #2505)
starting at 04:45 UT of 7 January 2004 (i.e. about 11 hours after the GRB 
trigger) in V, R and I filters with the ROSS spectrograph/imager.
The total exposure time was 180 s for each filter.

Observations in the infrared bands with the REMIR camera were not 
possible at this stage due to technical reasons.

When comparing the images with the DSS2, no new source was found within 
the INTEGRAL error box down to the following limiting magnitudes:

V ~ 19.3
R ~ 18.7
I ~ 18.2

Moreover, no source was detected inside the XMM-Newton error circle
(Ehle et al., GCN #2508).

This message may be cited.".