FROM TH2F
constant
0.007349544599121998+-0.013388696177437744
chi2/ndof = 0.0029795535174039238
plane
0.044909976137860755+-0.16720804744644707
invpt slope = 0.0004077544816000606+-0.012080101646182222
theta slope = -0.02908400804100473+-0.12163814778730389
chi2/ndof = 0.0013894780362696962
from tgraph2D
constant
0.010194987321488186+-0.0008339039020802924
chi2/ndof = 3.129280730574163e-05
plane
0.052885659010260495+-0.00717813004758371
invpt slope = 0.00039594743178456287+-0.00047443484283711334
theta slope = -0.03422933913648171+-0.005511084233203032
chi2/ndof = 1.648384292471337e-05