FROM TH2F
constant
23.686165902738146+-0.6814944060083059
chi2/ndof = 13.00424571635847
plane
152.4905991069473+-5.626096804554634
invpt slope = -2.990392339123936+-0.6197524161178763
theta slope = -99.90151277771683+-4.504343257837698
chi2/ndof = 2.403032749250155
from tgraph2D
constant
35.49096001012643+-2.323559048440456
chi2/ndof = 307.7388191429512
plane
140.52374845281352+-9.028737889197314
invpt slope = -1.2592114948367545+-1.1442960596174871
theta slope = -91.07843866414194+-7.870022663411075
chi2/ndof = 89.73436990001257