FROM TH2F
constant
0.011934696379433868+-0.010661321445431051
chi2/ndof = 0.007386138389735407
plane
0.03756994990548561+-0.10715695754018217
invpt slope = 0.0007606901410474043+-0.003494644098263708
theta slope = -0.021762419994270542+-0.08152011563839257
chi2/ndof = 0.006427268385123642
from tgraph2D
constant
0.01866962088642986+-0.0010630466607438602
chi2/ndof = 0.0001231774341190667
plane
0.06614059151168399+-0.007260499016070372
invpt slope = 0.0024888163774260154+-0.00028005323281587514
theta slope = -0.04508383173108011+-0.005677880276668376
chi2/ndof = 5.681556422100005e-05