[Lowq] DC calibration issues

[seema at jlab.org]

Hello Everyone,
I have checked once again the fitting function used in dc3  and user_ana
software. Although double gaussian is used in each case but the starting
parameters are not allowed to vary freely in user_ana and that may be the
reason for inconsistency in time residual means.

Functional form used in user_ana

call hfithn(hid,'G+G','QB',0,ggpar,step,pmin,pmax,eggpar,chi2)
ggpar(1) = 50000
ggpar(2) = 0.
ggpar(3) = 0.02
ggpar(4) = 10000
ggpar(5) = 0.
ggpar(6) = 0.1

Functional form used in dc3

hfithn(HID,"g+g","Q",6,PAR,STEP,PMIN,PMAX,SIGPAR,&CHISQ);

PAR[6] = {500.0, 0.0, 0.0300, 50.0, 0.0, 0.100}

Please notice the extra  'B' option selected in user_ana and also the
starting parameters are different!

Best regards,
Seema


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