FROM TH2F
constant
0.02412971512114647+-0.017050497332958294
chi2/ndof = 0.010930078795598564
plane
0.04723754504691087+-0.09898648245356619
invpt slope = 0.007351847875544752+-0.012128302667093348
theta slope = -0.029493351943634085+-0.08568657006151865
chi2/ndof = 0.006014076821837251
from tgraph2D
constant
0.03223620028943541+-0.0019163597508301895
chi2/ndof = 0.0003341915572223938
plane
0.05011849308463178+-0.00690730288132879
invpt slope = 0.008394434461913135+-0.000974273355544773
theta slope = -0.02974534811473575+-0.006198010510606809
chi2/ndof = 0.00017805431077821685