FROM TH2F
constant
0.022652381009934518+-0.017861904155621316
chi2/ndof = 0.04378900368759358
plane
-0.009156740796954702+-0.041075208791155164
invpt slope = 0.04691795515020781+-0.03152586016987662
theta slope = 0.0019209777857794093+-0.0573682958250142
chi2/ndof = 0.01245919498313692
from tgraph2D
constant
0.055257027808290574+-0.006982484263475446
chi2/ndof = 0.004192937437270738
plane
-0.01916819804307301+-0.006768121247106654
invpt slope = 0.0626171855071784+-0.0037129863029243893
theta slope = 0.012600228369429315+-0.010474576923888203
chi2/ndof = 0.0008977580674220407