FROM TH2F
constant
30.917940417917762+-0.603109008183666
chi2/ndof = 20.434713211732962
plane
38.28564915603606+-2.1383397423811688
invpt slope = 1.0566426613324595+-0.5112992553544534
theta slope = -8.284538217327142+-1.9620929277644532
chi2/ndof = 20.71321696307856
from tgraph2D
constant
48.39917058935488+-2.8190298857828866
chi2/ndof = 739.0644431165247
plane
49.39305059786858+-10.824048567763601
invpt slope = 11.603190017093416+-1.9489829438482371
theta slope = -19.147847398090608+-9.813782553225378
chi2/ndof = 541.2475514442692