FROM TH2F
constant
30.78404748771265+-0.588122584248891
chi2/ndof = 42.39003656505735
plane
-21.27923092464156+-2.911493973206138
invpt slope = -7.37913014993009+-0.5149681268195092
theta slope = 77.97486064346121+-2.3996594308268744
chi2/ndof = 26.05923425004945
from tgraph2D
constant
71.1627495331271+-3.9593757340801448
chi2/ndof = 1473.6056823748138
plane
28.30220194840572+-20.917137516938
invpt slope = 1.4631568046223076+-2.978698803598955
theta slope = 35.87588040343418+-16.978075457566362
chi2/ndof = 1434.6391018202241