FROM TH2F
constant
0.012775454146726229+-0.014471823462463772
chi2/ndof = 0.00726624741275322
plane
0.08342706193646926+-0.1805969122434627
invpt slope = -0.0016487774145157964+-0.006818687176663257
theta slope = -0.04896212557433972+-0.13431593879111106
chi2/ndof = 0.004228581596902516
from tgraph2D
constant
0.020389272086528652+-0.0018115986078026723
chi2/ndof = 0.00023301415562586715
plane
0.08664838674696507+-0.01772021103813916
invpt slope = 0.00039913696960481573+-0.0006105387313090857
theta slope = -0.0521945288628165+-0.014066257364113616
chi2/ndof = 0.00019849956154384255