FROM TH2F
constant
0.04929364745000135+-0.024224556466935193
chi2/ndof = 0.011908814538939352
plane
0.008705890666772662+-0.1299475900299798
invpt slope = 0.017866012930743174+-0.021152463477145167
theta slope = 0.010314290987738516+-0.10707863394435999
chi2/ndof = 0.0033954099334419945
from tgraph2D
constant
0.058830355861569934+-0.0030773921515168464
chi2/ndof = 0.0008523308209653638
plane
0.007522378570578256+-0.009598208801134083
invpt slope = 0.018563222592314584+-0.0013377576017236594
theta slope = 0.013474888126135304+-0.008032541493158402
chi2/ndof = 0.00026981550984590667