FROM TH2F
constant
0.022630350714936333+-0.01703328217494976
chi2/ndof = 0.019873508563715604
plane
0.0011250339491801135+-0.04005397562302212
invpt slope = 0.030333351167286558+-0.026490413281437083
theta slope = -0.0034343032426662674+-0.05198385483899414
chi2/ndof = 0.002834667755839055
from tgraph2D
constant
0.03600838309514089+-0.003369184399723075
chi2/ndof = 0.0010670319308724483
plane
4.770227288812849e-06+-0.0027179440412304023
invpt slope = 0.03407763708141202+-0.0013590286239432892
theta slope = -0.002400838029764078+-0.003730845347910179
chi2/ndof = 0.0001378717840474256