FROM TH2F
constant
0.03659813289460294+-0.01832382840172481
chi2/ndof = 0.015889003936336306
plane
0.08037854122454084+-0.12073069416566903
invpt slope = 0.00795967870738838+-0.009826377652048813
theta slope = -0.055733726647300766+-0.10351848970946773
chi2/ndof = 0.006770976056967602
from tgraph2D
constant
0.05001120506122713+-0.002762888603128862
chi2/ndof = 0.0008778586447311245
plane
0.11429498749734873+-0.009565419917264185
invpt slope = 0.008945689625922341+-0.000906935000967593
theta slope = -0.0847256280461107+-0.008355356579032278
chi2/ndof = 0.0003132226176602951