FROM TH2F
constant
0.028933424636265203+-0.021602503080082328
chi2/ndof = 0.0069540797092007434
plane
0.0761952464545021+-0.14512373306773318
invpt slope = 0.007799563840383248+-0.01925153293618733
theta slope = -0.05139185627922989+-0.12662805456976858
chi2/ndof = 0.0027101273360960877
from tgraph2D
constant
0.0337523776557939+-0.002113718756262423
chi2/ndof = 0.00030381087468868444
plane
0.08912337941193052+-0.006618078492788417
invpt slope = 0.009224178417845771+-0.0009528525864498732
theta slope = -0.06327281050974154+-0.0058994578089074535
chi2/ndof = 8.496073848573968e-05