FROM TH2F
constant
0.015120337391607196+-0.014391939044736205
chi2/ndof = 0.004457705926150108
plane
0.003043682366152228+-0.0338363973029018
invpt slope = 0.01019187046554022+-0.022249984239900163
theta slope = 0.005523195932340388+-0.04144730338831471
chi2/ndof = 0.001253711293348458
from tgraph2D
constant
0.016816561211243475+-0.001229397952947934
chi2/ndof = 0.00013602773940451645
plane
0.0011565066328946573+-0.001392732306638348
invpt slope = 0.010820117474721896+-0.0008533325597757157
theta slope = 0.009346970378003942+-0.0018169532231169338
chi2/ndof = 3.924293816479494e-05