FROM TH2F
constant
0.018797738434613447+-0.025031805391531645
chi2/ndof = 0.0026144378877806756
plane
0.027658928867428014+-0.2108542513425077
invpt slope = 0.00236217483399502+-0.033649866783258015
theta slope = -0.010437145467131242+-0.1619688068079535
chi2/ndof = 0.0023079896109141317
from tgraph2D
constant
0.020352653906485562+-0.0012458538859446767
chi2/ndof = 5.1221012868961217e-05
plane
0.019541744108161015+-0.0078055432819219076
invpt slope = 0.005418402954415628+-0.001192027609496345
theta slope = -0.005625213864634918+-0.006025711536148814
chi2/ndof = 2.758851062808395e-05