FROM TH2F
constant
0.01918314617853792+-0.013920098899586245
chi2/ndof = 0.006490993632684736
plane
0.006554499644835732+-0.03214046154335595
invpt slope = 0.010850750205209096+-0.016860417507063817
theta slope = 0.002089337538313864+-0.03739089716888214
chi2/ndof = 0.0021992183092128356
from tgraph2D
constant
0.022483361225615707+-0.001374492848353355
chi2/ndof = 0.00022103997905259195
plane
0.0029188413157239285+-0.0013926007246143493
invpt slope = 0.01352692439560468+-0.0006728355292079476
theta slope = 0.00513483299993904+-0.0016287605803867802
chi2/ndof = 4.625847683561142e-05