Figure 1:
Dependence of two characteristic GRB quantities
on
,
the isotropic-equivalent energy radiated in gamma-rays.
The stars show the dependence of the intrinsic peak energy (multiplied here by
).
The circles show the dependence of the isotropic-equivalent number of photons emitted by the source.
Figure 3:
Correlation of X =
/
/
(see text ) with the measured redshifts of 17 GRBs.
The isolated star at z=4.5 is GRB 000131.
The dotted line shows the theoretical relation between
and z.