FROM TH2F
constant
0.02580529811024232+-0.0216607303270784
chi2/ndof = 0.007545410062199003
plane
0.08468708381412744+-0.17208442751444608
invpt slope = 0.0031472995865869857+-0.01699306106035384
theta slope = -0.05447273569422352+-0.14215993358708673
chi2/ndof = 0.0044166203603716835
from tgraph2D
constant
0.03173236455040353+-0.0020192923384657314
chi2/ndof = 0.00024057495134467423
plane
0.0929414154836358+-0.005986319455705171
invpt slope = 0.006583009328841315+-0.0007694412830256617
theta slope = -0.06425422735213081+-0.0050782620883557325
chi2/ndof = 4.987370228374899e-05