FROM TH2F
constant
16.218825329112867+-0.3949053607027049
chi2/ndof = 11.010797953688964
plane
11.398586685123686+-0.9354684557975761
invpt slope = -0.4020636969593476+-0.41773620958175744
theta slope = 11.295500078335067+-1.3711541667800715
chi2/ndof = 10.52095537702846
from tgraph2D
constant
26.900270135732704+-2.9326315439952855
chi2/ndof = 1023.4390044841276
plane
6.251142820158411+-6.194669663353416
invpt slope = 5.050015662992747+-2.2892267949424516
theta slope = 22.86902011636883+-9.077695216463644
chi2/ndof = 928.6180477448986