FROM TH2F
constant
0.036147929411598875+-0.013793196155139907
chi2/ndof = 0.040858292003877486
plane
-0.0032021532391760636+-0.030852245478230303
invpt slope = 0.022723767619622966+-0.008757654243672084
theta slope = 0.006373289100695133+-0.0410492291961564
chi2/ndof = 0.004782950869461038
from tgraph2D
constant
0.07092125047340905+-0.003835730828957826
chi2/ndof = 0.003045556014395744
plane
-0.006864889219625954+-0.003388490580163024
invpt slope = 0.024956846238127432+-0.000674333193862017
theta slope = 0.009788660220453119+-0.0042189807964754565
chi2/ndof = 0.00038810668172108875