In article , Steve Willner
writes:

That this yields that the most distant SNe have sub-par
luminosities seems to ring no alarm bells amongst the researchers.

Introducing an non-zero cosmological constant, when nearly everyone
up to then was convinced it was zero, isn't an "alarm bell?"

Indeed!

Note also that the currently favoured value for the cosmological
constant predicts not just a dimming with redshift but, at large
redshift, a brightening. This is a very specific prediction, and hard
to get from other models of the dimming.

One of the models that I'm juggling treats time dilation as the
square root of the redshift,

Is there any physical motivation for this? There is a very clear
physical motivation for multiplying by (1+z).

It would take some
searching around to find more light curves, but quite a few are
available. You could probably get more if you asked for them.

These days, it isn't possible to publish all data in a paper journal.
However, probably most of the stuff is available, even back to the raw
data, either by asking or due to some observatory policy which makes all
data public after a certain time. Since only a minority need such data,
and when they do, probably in electronic form, I think it is OK not to
publish it conventionally.