pspor grb1.ps loc 100 500 100 500 data grbV.dat xycol 1 2 ecol 3 lim 1309.5 1314 23.4 18.1 box 0 2 0 0 ptype 10 3 exp 0.2 poi err 2 err 4 exp 1 ylabel magnitude exp 1.2 rel 1309.8 19.55 lab V exp 1 tlabel GRB 990510 Optical Counterpart data grbI.dat xycol 1 2 ecol 3 !loc 100 500 100 400 !ylim 20.6 18.3 box exp 0.2 poi err 2 err 4 exp 1 xlabel JD Hel. - 2450000 !ylab I magnitude rel 1309.8 18.6 exp 1.2 lab I exp 1 hard