FROM TH2F
constant
0.04133909122023331+-0.017630094575451144
chi2/ndof = 0.011959672349255277
plane
0.06350093218674072+-0.11553303966729818
invpt slope = 0.00845420265833466+-0.008241591435087549
theta slope = -0.03817311665094161+-0.09478760777224396
chi2/ndof = 0.0031988898300105346
from tgraph2D
constant
0.05151646542691877+-0.0020725884956347964
chi2/ndof = 0.000597091606901769
plane
0.07877425354194811+-0.006878189094660531
invpt slope = 0.008460505870679083+-0.0005301696192286965
theta slope = -0.048713606616058516+-0.005854786845867891
chi2/ndof = 0.0001958848318810166