What is the highest redshift a galaxy with a known stellar mass can be observed?

As part of my research, I would need the following information which it seems I cannot find it in literature. I would like to know what are the highest redshifts at which $$10^{7}$$, $$10^{8}$$, and $$10^{9}$$ $$[Solar Unit]$$ galaxies can be observed let's say by current HST?

• But you can't see mass, only luminosity, so some sort of assumption is required. – Rob Jeffries Mar 29 at 18:24
• I mean inferred stellar mass. I just need to reference these saying our best ability to see such stellar masses at the highest redshift. An empirical and generic formula would give me a very crude estimate. – Ash Mar 29 at 18:35
• Much depends on whether you are excluding/including quasar-like activity. The M/L ratio can vary enormously. e.g. Accretion onto a billion solar mass black hole can be seen right back to redshifts $>10$. – Rob Jeffries Mar 29 at 20:13