FROM TH2F
constant
57.899645791643906+-1.121912631202327
chi2/ndof = 22.578271354401963
plane
122.93395990596161+-7.684825021645817
invpt slope = 0.4962491404127738+-1.2777375640521347
theta slope = -58.824940161562935+-6.001907243394841
chi2/ndof = 21.125628931580078
from tgraph2D
constant
75.85471262251144+-6.333774972777191
chi2/ndof = 1965.7185655675496
plane
134.45129099738097+-31.93626640210486
invpt slope = 15.34300817140294+-6.367552305461333
theta slope = -76.0019795571009+-25.796112861309503
chi2/ndof = 1490.1255041081909