FROM TH2F
constant
25.081748357506765+-0.9143622241749447
chi2/ndof = 17.034054900664575
plane
118.42647082688279+-7.721679601490775
invpt slope = -17.009265000976473+-1.3645918971215714
theta slope = -53.277627873878714+-5.65085310893304
chi2/ndof = 10.946225189806977
from tgraph2D
constant
40.84848583707133+-3.257869832103266
chi2/ndof = 350.25262259965314
plane
104.78685437008042+-26.006071874267974
invpt slope = -7.77227486980097+-3.9715307697913427
theta slope = -46.15650428433446+-20.076128117499582
chi2/ndof = 306.24674643459565