FROM TH2F
constant
0.027928682315860483+-0.0171460237294482
chi2/ndof = 0.018926483846870252
plane
-0.023651285679696977+-0.13331585990074665
invpt slope = 0.0018446459114124828+-0.009370613129518309
theta slope = 0.04241026244313274+-0.10888410782208165
chi2/ndof = 0.017667295719199016
from tgraph2D
constant
0.045523142777898096+-0.0025790228076900987
chi2/ndof = 0.000658484505589784
plane
0.08779225123224998+-0.013434706389043375
invpt slope = 0.006545332858767308+-0.001081716908911525
theta slope = -0.056466125830104796+-0.011068304055005052
chi2/ndof = 0.0003806663712449521