distributions for nightly alerts, example filters

[AshishMahabal]

Defining next steps becomes easier once we start visualizing output. To avoid pathologies best to take at least three different cases.

While the project will be for the entire dataset, it makes sense to break it down into smaller pieces.

• take data for three nights: (1) mostly high Galactic latitude, (2) more low Galactic latitude, (3) high-cadence night
• for these simply allow parameter distributions, and x-y/corner plots (i.e. without any filtering) for a handful of parameters
• repeat with filtered data from at least three filters

[Theodlz]

Thanks for opening that issue @AshishMahabal. Will give that a go this week