savefluxes mode normalization #42
-
Hi, I want to use CIGALE to create mock SEDs of galaxies and AGNs at different redshifts (and parameters) and compare them with survey depths or say put into S/N calculators. I took one of the the SEDs I currently have which was fitted with real data and tried using the best-fit parameters to create mock SEDs at different redshifts using the saveflux mode. I was expect CIGALE to output SEDs with gradually fainter fluxes with increasing redshifts. First as a test, I set the redshift the same as the systematic redshift. So I expecte the results to come out the same as the best-fit model from the pdf-analysis mode. However, I found that the normalization is completely off by ~27 magnitudes but the overall details in the SED are the same (see figure). Therefore, the colors would be the same but not the actual flux values. The cigale manual suggests that the Is this issue related? I attach the parameter files with this post. Is there a way to do correct the normalization or am I missing something. |
Beta Was this translation helpful? Give feedback.
Replies: 1 comment 2 replies
-
This is indeed because of the mass normalization. By default with |
Beta Was this translation helpful? Give feedback.
This is indeed because of the mass normalization. By default with
savefluxes
the integral of the mass will be normalized to 1 Msun. What you want to do is to scale the spectra by the value ofbest.sfh.integrated
from the best-fit. An offset of 27 mag suggests a log Mstar/Msun of 10.8.