FROM TH2F
constant
0.034733364088641284+-0.016804317118947074
chi2/ndof = 0.02199502064973841
plane
0.06419873972157561+-0.11309248181569814
invpt slope = 0.007765935624032544+-0.007406127679087723
theta slope = -0.04392205450220599+-0.09460080016227132
chi2/ndof = 0.010872976798403483
from tgraph2D
constant
0.05448750666484653+-0.002951680499196678
chi2/ndof = 0.0011151894743890785
plane
0.11363302787351218+-0.01025795024370227
invpt slope = 0.010157622901451292+-0.0007744241102334023
theta slope = -0.08768983076202394+-0.008981437269294333
chi2/ndof = 0.0003809525605915969