FROM TH2F
constant
0.0213952131158213+-0.015865320352271964
chi2/ndof = 0.011345285331957642
plane
0.059660588189204514+-0.09007334339963483
invpt slope = 0.007632030874549803+-0.012750549917243115
theta slope = -0.04141761813037852+-0.07481893647193029
chi2/ndof = 0.0043342460706672975
from tgraph2D
constant
0.03013838874093917+-0.001978512583470021
chi2/ndof = 0.0003640496199887347
plane
0.0698789559606105+-0.005375726041695125
invpt slope = 0.009418759632630565+-0.0009679556378093755
theta slope = -0.0505746389014332+-0.004873980947268476
chi2/ndof = 0.0001335029238689481