Table 3: X-ray luminosity (assuming isotropy, $L_{\rm X} ^{\rm iso}$, and after beaming correction, $L_{\rm X} ^{\rm corr}$), energy emitted during the prompt $\gamma $-ray event (assuming isotropy, $E_{\gamma } ^{\rm iso}$) in units of 1051 erg, and beaming angle for BeppoSAX GRBs with a measured beaming angle (extracted from literature).

GRB name		 $L_{\rm X} ^{\rm iso}$ $E_{\gamma } ^{\rm iso}$ $\rm\theta$ $L_{\rm X} ^{\rm corr}$
  $\rm 10^{44}$ erg s-1 $\rm 10^{51}$ erg rad $\rm 10^{44}$ erg s-1

GRB 970228		 28.6 9.9 $\rm >$0.32 $\rm >$1.46
GRB 970508 16.1 3.5 0.391 1.23
GRB 971214 147 125 $\rm >$0.1 $\rm >$0.74
GRB 980613 7.21 4.26 $\rm >$0.226 $\rm >$0.2
GRB 980703 37.4 74.1 0.2 0.75
GRB 990123 373 692 0.089 1.48
GRB 990510 269.7 144.5 0.054 0.39
GRB 990705 - 79.4 0.096 -
GRB 990712 - 3.32 $\rm >$0.777 -
GRB 000210 6.96 130 $\rm >$0.139 $\rm >$0.07
GRB 000214 3.4 3.17 $\rm >$0.115 $\rm >$0.023
GRB 000926 335 155 0.140 2.14
GRB 010222 377 375 0.08 13.1
GRB 011121 5.1 3.74 0.145 0.05
GRB 011211 20 68.8 0.115 0.12


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