FROM TH2F
constant
32.55982157926793+-1.1190624774786615
chi2/ndof = 14.99091930141655
plane
218.5745580321+-11.6290670055274
invpt slope = -3.9998802385201753+-1.6982527656750406
theta slope = -149.64918077756485+-9.7747512655866
chi2/ndof = 4.807508208287206
from tgraph2D
constant
46.45811182443781+-3.5919476509948014
chi2/ndof = 387.0626379398094
plane
191.49019777602314+-20.684077134415233
invpt slope = 5.815204370137082+-2.7050415599030444
theta slope = -132.31765599901274+-17.95702690822042
chi2/ndof = 132.12026312985643