$\chi^2$ Value Question - COSMOMC
Posted: April 14 2020
Hi everyone,
I am currently working on a project using cosmomc and I have successfully performed some runs including CMB (TT+lowTEB+lensing), BAORSD, and DES likelihoods and obtained [math]. I would like to ask a few questions regarding the obtained $\chi^2$ value.
1) Usually $\chi^2$ is normalized by dividing it with the degree of freedoms(dof). What is the dof of the CMB likelihoods (TT+lowTEB+lensing)
in order to have a qualitative hint of my fit?
2) I am not quite sure why there is an errorbar in the total $\chi^2$ value. Do I have to also include the value of the prior?
I am currently working on a project using cosmomc and I have successfully performed some runs including CMB (TT+lowTEB+lensing), BAORSD, and DES likelihoods and obtained [math]. I would like to ask a few questions regarding the obtained $\chi^2$ value.
1) Usually $\chi^2$ is normalized by dividing it with the degree of freedoms(dof). What is the dof of the CMB likelihoods (TT+lowTEB+lensing)
in order to have a qualitative hint of my fit?
2) I am not quite sure why there is an errorbar in the total $\chi^2$ value. Do I have to also include the value of the prior?