FROM TH2F
constant
5.3654616641895805+-0.21985789158565053
chi2/ndof = 0.2451932478878432
plane
6.703954531397433+-1.6830992805883807
invpt slope = 0.013458242491388876+-0.10381461626067087
theta slope = -1.2359842004174388+-1.4047157863646944
chi2/ndof = 0.2421362322736833
from tgraph2D
constant
5.6019520260073135+-0.10682092665792736
chi2/ndof = 1.3122316911340266
plane
8.054796377706062+-0.7242459495508976
invpt slope = 0.05663963677418982+-0.04497767491106636
theta slope = -2.3741720553263073+-0.6068707918258545
chi2/ndof = 1.1510874242247167