FROM TH2F
constant
0.026543208646603752+-0.01689410682552021
chi2/ndof = 0.0201311557515002
plane
0.07450626058163579+-0.10118319730543153
invpt slope = 0.007256172391694429+-0.011869364002836611
theta slope = -0.052440312737016034+-0.07919987536421545
chi2/ndof = 0.011632967192852584
from tgraph2D
constant
0.04500864307988307+-0.0034633327915659256
chi2/ndof = 0.0011634833806504587
plane
0.12009587100410932+-0.013839798152026928
invpt slope = 0.00969060607097156+-0.0015417057228659834
theta slope = -0.08870563219361349+-0.011305642352241074
chi2/ndof = 0.000557447350389424