FROM TH2F
constant
0.013500482217375187+-0.01315610524440338
chi2/ndof = 0.01169491829107477
plane
0.08574483640576949+-0.09505814975241843
invpt slope = 0.002662281173740688+-0.009627185912930032
theta slope = -0.06007143339424135+-0.07569258095412519
chi2/ndof = 0.003577285041461475
from tgraph2D
constant
0.023657174811927705+-0.0018453111881372663
chi2/ndof = 0.0002860345640128018
plane
0.09500520810907682+-0.004729697812404878
invpt slope = 0.004490860270984831+-0.000633519975182341
theta slope = -0.06874768652006398+-0.0040612516571723436
chi2/ndof = 6.217161818748305e-05