All Tables

Table 1: List of observations retrieved from the archives with some basic information (configuration of the instruments, instrument that detected the prompt emission). We also report the first refereed publication on the X-ray afterglow.
Table 2: GRB X-ray afterglow results. For each afterglow, we give the source name, the exposure duration and the net observation duration, together with the results of the spectral and temporal analysis. We quote the absorption (measured at the host redshift or at a value of z=1 when the host redshift is unknown) in excess to the galactic absorption. The X-ray absorption excess upper limits are given at the 90% confidence level. We also indicate the number of detected counts for the source as a proxy of the detection confidence level.
Table 3: List of GRB afterglow fluxes extrapolated or interpolated 11 and 12 h after the burst from their spectral and temporal parameters (assuming there is no evolution of these parameters). These two times are chosen to match the works by De Pasquale et al. (2006) and Berger et al. (2005) about Beppo-SAX and SWIFT respectively. We have separated the Chandra Grating ( top), Chandra Imaging ( center) and XMM-Newton ( bottom) samples due to their different observation times, and have removed GRB 030329 due to its very late XMM-Newton observation.
Table 4: Mean parameters of each sub-sample from this paper. We include the decay index ( $\delta$ ), the spectral index ( $\alpha$ ), the flux at 11 h after the burst and the observation start time. We also recall the main parameters from the BeppoSAX sample (De Pasquale et al. 2006). All errors are quoted at a 68% confidence level.