FROM TH2F
constant
4.059970396886711+-0.1618436204045781
chi2/ndof = 3.7419987993570674
plane
6.1151437583121755+-0.4646052821308537
invpt slope = 0.3004091141597591+-0.11065125560705198
theta slope = -3.5202123515249673+-0.42376299813750645
chi2/ndof = 3.2468109347384995
from tgraph2D
constant
9.11796941278558+-0.9117830941952113
chi2/ndof = 142.99192701300828
plane
10.455264456212287+-1.9983692250342768
invpt slope = -2.7959319968558023+-0.528640908053187
theta slope = 7.810584266651361+-2.471757356532366
chi2/ndof = 120.33640992089204