FROM TH2F
constant
0.014603406663755978+-0.016294676578704453
chi2/ndof = 0.0037868754105764273
plane
0.004712032943832163+-0.03917679411311822
invpt slope = 0.013186740297604724+-0.030355941589644036
theta slope = 0.0002585661285578883+-0.05440673306978304
chi2/ndof = 0.00030602570378746686
from tgraph2D
constant
0.015504740998108965+-0.001129327694043009
chi2/ndof = 8.927667283838135e-05
plane
0.004881512348538243+-0.0007116655010284261
invpt slope = 0.01331542254502247+-0.0004973335705336841
theta slope = 0.0004869082967820398+-0.0010671694495442724
chi2/ndof = 7.939753063270067e-06