FROM TH2F
constant
0.0273203678010564+-0.017422963070783403
chi2/ndof = 0.026968267600178963
plane
-0.003310802918773517+-0.04022505371553842
invpt slope = 0.03238355773542267+-0.023805394866138373
theta slope = 0.003615007600157737+-0.05414969312056655
chi2/ndof = 0.006208882145416169
from tgraph2D
constant
0.04692671021837788+-0.004776951947655806
chi2/ndof = 0.002418842610517014
plane
-0.00814561907876042+-0.0057062379093157966
invpt slope = 0.041510211969824844+-0.002539139115959125
theta slope = 0.0033026830253135827+-0.007765027224478101
chi2/ndof = 0.0006786882632912539