Fig. 4
Left panel: 
vs. (1 + z) (dots). Dashed contours denote constant fluences (in
units 10-7 erg/cm2): I. the maximal fluence, i.e. 1050;
II. 105; III. 10.5; IV. the minimal fluence, i.e. 0.68. Right
panel: 
vs. (1 + z) (dots). Dashed contours denote constant peak-fluxes (in
units ph cm-2 s-1): I. the maximal peak-flux, i.e. 71;
II. 7.1; III. 0.71; IV. the minimal peak-flux, i.e. 0.04. The objects below a curve
at smaller redshifts together with those at higher redshifts and above the curve
illustrate the inverse behaviour.
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