FROM TH2F
constant
0.021361045743728452+-0.017594896231601886
chi2/ndof = 0.024656894327261286
plane
0.00031071938005505827+-0.040058214888489214
invpt slope = 0.03020445285470707+-0.028132728556917716
theta slope = -0.0021801164212146627+-0.058258865213961286
chi2/ndof = 0.007915042669661525
from tgraph2D
constant
0.038491585211339455+-0.004403680382809625
chi2/ndof = 0.0016289616771371874
plane
-0.004338438035061759+-0.005114294928377614
invpt slope = 0.037788251909762434+-0.0028211926040642844
theta slope = 0.006004154256342143+-0.00791197295503124
chi2/ndof = 0.0004953837799356198