FROM TH2F
constant
0.020840696187874343+-0.025130384955829765
chi2/ndof = 0.002418858506684632
plane
0.05177625729363887+-0.2886168597759999
invpt slope = 0.004967090891429989+-0.02742240924420881
theta slope = -0.031191295002836652+-0.2301350889498263
chi2/ndof = 0.0007868845400889443
from tgraph2D
constant
0.022277180824714162+-0.0013755885683007574
chi2/ndof = 6.812078073259525e-05
plane
0.051863466654005354+-0.007651290380828838
invpt slope = 0.005426783676711543+-0.0006883413471345901
theta slope = -0.03124728463409786+-0.006044137837098591
chi2/ndof = 1.6266545714889178e-05