FROM TH2F
constant
0.006409956039994868+-0.012209371199790505
chi2/ndof = 0.023525886539166024
plane
0.09116729127557915+-0.12081502501085223
invpt slope = 0.002600453607735762+-0.0272913294531837
theta slope = -0.0683890854736892+-0.08395775286013515
chi2/ndof = 0.00746295146604011
from tgraph2D
constant
0.02821662271506506+-0.0020212445315262763
chi2/ndof = 0.0001879297549870721
plane
0.05396676712168323+-0.00783323495137808
invpt slope = 0.007300019741575981+-0.0014415904959622827
theta slope = -0.03440572475386963+-0.006253296227454914
chi2/ndof = 6.921820832930312e-05