FROM TH2F
constant
30.094592082090365+-0.5254494980042035
chi2/ndof = 18.158595373684744
plane
23.788720074790625+-3.06016630258983
invpt slope = -3.2865853095971564+-0.22915959832474
theta slope = 16.237887167738904+-2.5602552003224766
chi2/ndof = 16.474744763809525
from tgraph2D
constant
48.82038466245225+-2.649558771053236
chi2/ndof = 800.2984321457852
plane
100.04672030015014+-17.44654311965958
invpt slope = -3.0572344968160445+-1.1379927065611373
theta slope = -33.5131221678418+-14.46187114154525
chi2/ndof = 711.9171925974822