FROM TH2F
constant
0.020438395565177202+-0.02382715278887116
chi2/ndof = 0.0069917488892113164
plane
0.04417968333662398+-0.1673337919798189
invpt slope = 0.015010163188875937+-0.03554603656870497
theta slope = -0.03438053023462204+-0.1522519049103658
chi2/ndof = 0.0005443329259385481
from tgraph2D
constant
0.02407414435808364+-0.002240016339966987
chi2/ndof = 0.0002107422745401651
plane
0.04712226120027941+-0.003842043004433019
invpt slope = 0.015641175599076258+-0.000723615867053597
theta slope = -0.03751688964001257+-0.0036156251005161305
chi2/ndof = 1.4074903531643124e-05