FROM TH2F
constant
13.332007916518888+-0.5270200797875976
chi2/ndof = 36.545178579403505
plane
192.2206456891831+-7.169363171480417
invpt slope = -12.507074715813362+-0.44762058033486857
theta slope = -114.6958249871883+-5.591051380402217
chi2/ndof = 14.099348279044916
from tgraph2D
constant
47.04982731007199+-3.8021649743920047
chi2/ndof = 766.192300027787
plane
218.7894056851382+-20.948106201025098
invpt slope = -2.033743565251797+-2.1869904000884444
theta slope = -144.78192699791197+-17.691602274992263
chi2/ndof = 336.83118846099404