zp
     bin center    sigma        error              
   0.5000000E-01  0.000000      0.000000    
   0.1500000     0.1443904E-01 0.1443904E-01
   0.2500000     0.1527981     0.9167889E-01
   0.3500001     0.6337706     0.1728465    
   0.4500000     0.3650358     0.2246374    
   0.5500001     0.8279990     0.2661425    
   0.6500001      1.630119     0.2629225    
   0.7500001      1.279720     0.2056693    
   0.8500001      1.109832     0.2296204    
   0.9500001      6.723110     0.4907379    
  
  sigma from zp    1.273682     0.7515056E-01