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The optical light curve of GRB 970228 refined
N. Masetti, C. Bartolini, A. Guarnieri +1
We present the R and V light curves of the optical counterpart of GRB 970228. A critical analysis of all the available data is made in light of the results achieved in the recent G…
Optical observations in the field of GRB 970111
N. Masetti, C. Bartolini, A. Guarnieri +1
B, V and R optical photometry performed on the field of the GRB 970111 soon after its detection by BeppoSAX is presented. No remarkable optical object is found inside the corrected…
Did GRB 970228 and GRB 970508 present similar optical properties?
C. Bartolini, G. M. Beskin, A. Guarnieri +2
The analysis of the light curves of the optical counterparts of GRB 970228 and GRB 970508 points out remarkable similarities. The spectral distribution obtained from the color indi…
Early detection of the Optical Transient following the Gamma-Ray Burst GRB 970228
A. Guarnieri, C. Bartolini, N. Masetti +9
The optical counterpart of the Gamma-Ray Burst GRB 970228, discovered by Groot et al. (IAU Circ. 6584), is also detected in the B and R frames obtained about 4 hours earlier at the…