FROM TH2F
constant
0.01989594250423651+-0.01791374608184382
chi2/ndof = 0.012482060392479724
plane
0.03270125390377967+-0.11522427056878458
invpt slope = 0.008577207755712938+-0.014358244501795799
theta slope = -0.02230118065652521+-0.10618367497453375
chi2/ndof = 0.006853471313627524
from tgraph2D
constant
0.030913495971675115+-0.0019389261544022493
chi2/ndof = 0.00024812268573041666
plane
0.07515359456703101+-0.007113122573065155
invpt slope = 0.006197287947324933+-0.0010010035197276208
theta slope = -0.050104721850112+-0.006195143602500549
chi2/ndof = 0.00010326310396340763