Astronomy & Astrophysics

Table 1: Numbers of detected afterglows in the X-ray, optical and radio domains, for a total of 276 GRBs localised before July 2005 (X-ray flashes are excluded).
Table 2: Observation log for GRB 040223. Observing times refer to the middle of the exposures and $\Delta T$ is the time since the GRB. Magnitudes are calibrated following the 2 MASS catalogue. Magnitude limits are at the 3- $\sigma$ level.
Table 3: Observation log for GRB 040624. Observing dates are referred to the middle of the exposures. Magnitude limits are at the 3- $\sigma$ level.
Table 4: A compilation of afterglow data for 39 GRBs. References are given in superscripts. Delay times close to our epochs of observation for GRB 040223 and GRB 040624 are preferred.
Table 5: The magnitudes of the optical/NIR afterglow of GRB 040223 predicted by extrapolation of the X-ray afterglow, assuming that the host is similar to the Galaxy. The observed limits are reported for comparison.
Table 6: The magnitudes of the optical/NIR afterglow of GRB 040223 predicted by extrapolation of the X-ray afterglow, assuming that the host is similar to the SMC. The observed limits are reported for comparison.