GCN Circular 7149
Subject
GRB 071227: REM NIR and Optical observations
Date
2007-12-28T01:36:30Z (16 years ago)
From
Paolo D'Avanzo at INAF-OAB <paolo.davanzo@brera.inaf.it>
P. D'Avanzo, S. Piranomonte, L.A. Antonelli, S. Covino, D. Fugazza, L.
Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V.
D'Elia, F. Dalessio, F. Fiore, P. Goldoni, D. Guetta, C. Guidorzi,
G.L. Israel, N. Masetti, A. Melandri, E. Meurs, L. Nicastro, E. Palazzi,
E. Pian, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V.Testa,
S.D. Vergani, F. Vitali report on behalf of the REM team:
The robotic 60-cm REM telescope located at La Silla (Chile) observed the
field of the GRB 071227 (Sakamoto et al., GCN 7147). Observations were
performed automatically in the both optical (R, I) and NIR (Z, J, H, K)
filters at Dec 28.03611 (about 4.6 hours after the burst ) .
A preliminary analysis of the first set of R-band and H-band exposures
does not reveal any optical afterglow candidate inside the XRT error box
(Sakamoto et al., GCN 7147) We derive the following upper limits of R >
17.0 (calibrated against USNO B1catalog) and H > 15.5 (calibrated
against the 2MASS catalog).
Futher analysis are in progress.