FROM TH2F
constant
0.02254619188509596+-0.019384784369749452
chi2/ndof = 0.017256202327178508
plane
0.08169175084883776+-0.11736708426242488
invpt slope = 0.009316419916279545+-0.0234499097463858
theta slope = -0.06258566290959809+-0.09763398547958524
chi2/ndof = 0.00593947414953409
from tgraph2D
constant
0.03653171886484097+-0.0044161249379681255
chi2/ndof = 0.0012871425247227525
plane
0.14095172374729242+-0.014039233221392635
invpt slope = 0.006766425824578148+-0.003110047028080411
theta slope = -0.11372397681891794+-0.012538909274613435
chi2/ndof = 0.0005288233544964392