FROM TH2F
constant
0.0370423152036605+-0.017793284827640206
chi2/ndof = 0.01038296840424578
plane
0.027733200976761244+-0.10023964227456786
invpt slope = 0.0060549718258366475+-0.009357537657874709
theta slope = -0.005751667309734809+-0.08324723178938122
chi2/ndof = 0.006882971944423568
from tgraph2D
constant
0.04582457560786039+-0.0019503465535056707
chi2/ndof = 0.0004678737564688637
plane
0.05837629546203012+-0.008785260753562759
invpt slope = 0.006410750596065713+-0.000798848624173676
theta slope = -0.027675056234959933+-0.007400626383015542
chi2/ndof = 0.0002973980893368548