FROM TH2F
constant
19.30805631053422+-0.42881960119411217
chi2/ndof = 25.000799900949517
plane
61.55717788522625+-2.8911199427368404
invpt slope = -6.678332667306888+-0.23195064025522297
theta slope = -10.816966558670003+-2.289981194082288
chi2/ndof = 17.348885244663276
from tgraph2D
constant
44.407037301254974+-2.6533261159983677
chi2/ndof = 774.4153415679136
plane
120.95999033255387+-14.82684638045904
invpt slope = -3.71001306693958+-1.2514176674316753
theta slope = -58.57106367670656+-12.669254535622688
chi2/ndof = 617.9905195419832