FROM TH2F
constant
0.023043734336284198+-0.018545520569889066
chi2/ndof = 0.04195928607970245
plane
-0.0074854464341289695+-0.04268912329578004
invpt slope = 0.04837036749002544+-0.03297013041936317
theta slope = -0.0002861383097570863+-0.059509328181486305
chi2/ndof = 0.009639282250884238
from tgraph2D
constant
0.054214643534822304+-0.006517330450903189
chi2/ndof = 0.0034405232922438836
plane
-0.017305667471173996+-0.00601608430563067
invpt slope = 0.055286623699042914+-0.003424354384961792
theta slope = 0.024679980482498164+-0.009745991061663222
chi2/ndof = 0.0007029202162242607