&plot
 afigname='/home/jeffery/public_html/astro/sne/spectra/d1990/sn1991bg_Ia/f3.ps'
 afile='./d1990/sn1991bg_Ia/dif/sn1991bg_1992_01_01.dif'
       './d1990/sn1991bg_Ia/dif/sn1991bg_1992_01_02.duf'
       './d1990/sn1991bg_Ia/dif/sn1991bg_1992_01_02.duf'
 idash=0,1,2
 ifile=2
 iformat=-1,1,1   ! We are plotting diffed and supposedly deredshifted spectra.
 ixlog=1
 ! ixlog=0
 xtick=-.2,-1.
 iylog=1
 ! iylog=0
 ytick=-1.,-5.
 scale=1.,1.,1.
 ismooth=0
 smooth_x=.00167,smooth_zone=1.d+30
 title='\rm ' 
 v_helio=946.,-3000.,-3000.,   ! A minus signs on the format statements prevent further shifting.
 xmin=3000.
 xmax=8000
 ylabel='\rm Flux'
 ymin=.3
 ymax=2.5

 iputlabel=0
 aputlabel=
        '\rm H\delta?'
        '\rm H\gamma'
        '\rm H\beta'
        '\rm HeI'
        '\rm H\alpha'
        '\rm CaII?'
 putlabel=4000.,1.15,
          4300.,1.1,
          4670.,1.05,
          5625.,1.1,
          6285.,.89,
          7809.,1.09,
/