Fitting multiple Gaussians over quadratic bkgd

ROOT
1

I have a histogram where I’d like to fit multiple Gaussians over a quadratic background, and draw it over the existing histogram. I have 8 Gaussian, each of which I want to constrain both the centroid and the FWHM (2nd and 3rd parameters), input manually in my script. Attached is the file containing the histogram.

Thanks
hist.root (29.5 KB)

2

see example in attachment. To execute do

root > .x fitg.C+
Rene
fitg.C (1.37 KB)