FROM TH2F
constant
0.03940823640879937+-0.01696028775152852
chi2/ndof = 0.02277858898063956
plane
0.07942184428683839+-0.08092973826032307
invpt slope = 0.010662772373108084+-0.009029195889944793
theta slope = -0.05561550383054634+-0.06977521747228355
chi2/ndof = 0.009442234111849388
from tgraph2D
constant
0.059125998238962627+-0.0030258288233047355
chi2/ndof = 0.0013275678104361839
plane
0.10691478606933871+-0.008814968661945224
invpt slope = 0.012351347903880084+-0.0009759330679502733
theta slope = -0.07802002024872012+-0.008162592797167016
chi2/ndof = 0.0005400583138582639