FROM TH2F
constant
0.007970933240337064+-0.01657889522533531
chi2/ndof = 0.003925591574269425
plane
0.003464937715606683+-0.12830270550011605
invpt slope = 0.007251642844277843+-0.026930462597583874
theta slope = -0.0016063711573029024+-0.0989240697967356
chi2/ndof = 0.0011450702304164058
from tgraph2D
constant
0.010658961846976726+-0.001104652886725022
chi2/ndof = 4.0268514004889204e-05
plane
-7.677922890389488e-05+-0.00383054447468867
invpt slope = 0.006922812331729284+-0.0006124675109769242
theta slope = 0.0027391787445931546+-0.003173642986076807
chi2/ndof = 8.133316481949529e-06