FROM TH2F
constant
5.2439509437603355+-0.29812836947491667
chi2/ndof = 0.21254772258624602
plane
6.002900415965197+-1.7492559817585325
invpt slope = -0.16118217283684622+-0.3169250113298015
theta slope = -0.4550793071831114+-1.4832298840122935
chi2/ndof = 0.21440363132542611
from tgraph2D
constant
5.424237388014797+-0.11102254251539719
chi2/ndof = 0.801190321216143
plane
6.563486096607205+-0.6632992791810675
invpt slope = 0.004097737683685543+-0.10545217967464579
theta slope = -1.075384357817315+-0.58004797846821
chi2/ndof = 0.782926383332945