FROM TH2F
constant
0.0406746234215185+-0.017357808246295233
chi2/ndof = 0.011517994200846518
plane
0.06665309172607294+-0.11239087913578764
invpt slope = 0.006565097360676744+-0.00781697080172576
theta slope = -0.037912068748686197+-0.09255494042267354
chi2/ndof = 0.005255225100717187
from tgraph2D
constant
0.050590660697774244+-0.001999531335827935
chi2/ndof = 0.0005637357043374984
plane
0.0810646213764617+-0.006835154577576214
invpt slope = 0.007736277987285691+-0.0005213387248773379
theta slope = -0.04976436240256766+-0.0058300881980404414
chi2/ndof = 0.00019684945205783786