FROM TH2F
constant
0.03920615954704828+-0.019900296821721536
chi2/ndof = 0.005657399765603743
plane
0.027371495797628986+-0.05059071293130333
invpt slope = 0.0026995273167597245+-0.025413469561108782
theta slope = 0.011530114010866049+-0.05190012295542722
chi2/ndof = 0.0050575134558710965
from tgraph2D
constant
0.045191727287948166+-0.0016896619214809077
chi2/ndof = 0.00033688497423838145
plane
0.03475575146288772+-0.0034829368237826873
invpt slope = 0.004833556751306008+-0.001705227101708979
theta slope = 0.006661871734819653+-0.004062105397452737
chi2/ndof = 0.0003052606180733002