FROM TH2F
constant
24.148502123916604+-0.6191199872683912
chi2/ndof = 51.33103882345697
plane
58.145273875529675+-5.413042301560162
invpt slope = -0.36156051903632713+-0.4730770609540881
theta slope = -25.04306362740349+-4.4582676961756205
chi2/ndof = 52.30484831420471
from tgraph2D
constant
77.70207241997366+-5.225965540329105
chi2/ndof = 1911.7501102467388
plane
2.2234362348142724+-58.93951225626321
invpt slope = -1.9997134448493419+-2.048902540122232
theta slope = 63.30939064321169+-46.11712989076603
chi2/ndof = 1898.0752338417649