FROM TH2F
constant
30.50672995176135+-0.633564788647114
chi2/ndof = 16.012512125579303
plane
17.332241424520344+-3.699684088901746
invpt slope = -3.226251794220811+-0.5941542858128922
theta slope = 17.99339489765992+-3.193166075827458
chi2/ndof = 15.628001316936396
from tgraph2D
constant
44.13150913790594+-2.6767968228518075
chi2/ndof = 594.7150216899635
plane
38.435714818395645+-12.748519792789097
invpt slope = 6.951197816133745+-2.152446801274016
theta slope = -5.420362584810414+-11.04521254619495
chi2/ndof = 539.1103138512302