FROM TH2F
constant
7.582573865990027+-0.4409364701651135
chi2/ndof = 13.292083385661098
plane
-0.8931010438773788+-2.6960406032981523
invpt slope = -5.121902764119707+-0.6831812698347578
theta slope = 18.15989719742057+-2.5889404656492756
chi2/ndof = 11.294285525968913
from tgraph2D
constant
26.5788268886125+-5.757634370698222
chi2/ndof = 1425.4652011286728
plane
-26.16221727136149+-30.623300489965082
invpt slope = -22.808048286329786+-5.019135647717359
theta slope = 80.30376159627468+-26.674330013171534
chi2/ndof = 705.3791520366483