I am trying to fit in Pd compound and the fit that I obtained looks kinda good. I used Pd metal and Pd(OAc)2 shells for fitting. These standards were collected and fitted simultaneously and I got the SO2 value there as 0.67 with Pd foil coordination number as 12 which is correct when considered Pd foil CN. Next while fitting the actual sample (unknown) I used the formula in SO2 column as amp*N1 and put amp as 0.67 and N as 1. I kept N1 as variable (Guess). same I did for the second shell of Pd-O with N2. amp is kept on SET value of 0.67. After fitting I received the N1 and N2 value as 5.6 (0.5) and 1.6 (0.7) (roughly). however, when I checked the correlations between the variables I got the values as given in the log file attached. I saw there is some correlation between bkg01_01 and N2 and many such correlations between bkg values. I have so far never seen such correlations. What are the implications of these correlations? does this means that my fitting assumptions are incorrect. does correlations values in negative indicates something?

Thank you very much for the input. By the way my RBKG is 1.2 in athena and I used this same file for fitting purpose and on artemis I used rmin 1.2 and rmax 3.4. All these information are in log file attached

Any help in understanding this is appreciated. 

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