FROM TH2F
constant
0.022585675996356334+-0.017835585574659665
chi2/ndof = 0.009642485412371683
plane
0.07115424682145967+-0.1409112293587688
invpt slope = -0.001027612585896719+-0.01074411536530086
theta slope = -0.037223835572346854+-0.11578317430541263
chi2/ndof = 0.007963650634133037
from tgraph2D
constant
0.03060042468209749+-0.0018721726166879818
chi2/ndof = 0.00026988733362364055
plane
0.0747432339752061+-0.009277110253126428
invpt slope = 0.004275426625900865+-0.0011059106092444538
theta slope = -0.044003518527269386+-0.007706841697001105
chi2/ndof = 0.00017699953553763285