FROM TH2F
constant
0.028114527765847715+-0.020333443829059095
chi2/ndof = 0.004897800398645742
plane
0.05670813247262718+-0.14018602469255664
invpt slope = 0.00555542699393416+-0.016068429522390924
theta slope = -0.03154923930906909+-0.11543021200385858
chi2/ndof = 0.0024848632540574807
from tgraph2D
constant
0.031356645753859054+-0.0015463833693741976
chi2/ndof = 0.0001769563128593618
plane
0.06075920458347911+-0.006388690135246464
invpt slope = 0.006055381212018773+-0.0008244947253575231
theta slope = -0.03415457908693269+-0.005288334683246538
chi2/ndof = 8.29184507830503e-05