FROM TH2F
constant
19.2142424906495+-0.47826873410863524
chi2/ndof = 78.44849463356708
plane
39.834774031021865+-2.2838766886456314
invpt slope = -13.33988616107091+-0.462141847037926
theta slope = 17.23417107971478+-2.0983570638274944
chi2/ndof = 70.09895425131604
from tgraph2D
constant
96.73752914573258+-4.764550180000327
chi2/ndof = 2065.785392017636
plane
124.70295986217546+-24.97616237518081
invpt slope = 0.5453266725019019+-3.4108385125801233
theta slope = -27.54597176767534+-23.427564280904328
chi2/ndof = 2080.0302321653066