This might be a bit obvious, but I just want to make sure we're on the same page: we want to apply K-corrections and Galactic extinction corrections to the host galaxy magnitudes, right? I'm typically working with low-redshift stuff so I haven't had to worry much about K-correction, but it seems like we should put all the host mags into their rest-frame values if we want to compare them.
This might be a bit obvious, but I just want to make sure we're on the same page: we want to apply K-corrections and Galactic extinction corrections to the host galaxy magnitudes, right? I'm typically working with low-redshift stuff so I haven't had to worry much about K-correction, but it seems like we should put all the host mags into their rest-frame values if we want to compare them.