FROM TH2F
constant
0.03540467937797601+-0.015734839378791155
chi2/ndof = 0.023383470689067792
plane
0.06510484959116293+-0.0896888980874625
invpt slope = 0.012957090808965632+-0.008112677994751084
theta slope = -0.04858525659163285+-0.07593484042753941
chi2/ndof = 0.004272503679963638
from tgraph2D
constant
0.05578406414569581+-0.002904760593081431
chi2/ndof = 0.0012740827500446988
plane
0.08012697743185791+-0.006699392683307331
invpt slope = 0.01430452714018083+-0.0006067995187027744
theta slope = -0.06231560339644662+-0.006078003808800662
chi2/ndof = 0.00026773302114065285