I started playing with a new way to visualize OpSim runs. Here’s a plot showing how many times a spot in the sky has been observed as a function of time. Normally, we just make Aitoff plots of various values at the end of the survey, but that doesn’t help if one wants to see the time-evolution. Basically, I’ve sacrificed displaying one of the spatial dimensions in favor of time here.
Some of the interesting things you can see:
- Large blue region at the top = outside the survey.
- region around healpix ID 4000 = North Ecliptic Spur. You can see it bumps up seasonally, and stops getting more visits after ~year 3.
- The big rainbow is the wide-fast-deep main survey.
- You can pick out a few of the deep drilling fields
- at the bottom, the South Pole gets observed less and completes early.
My hope is that plots like this might be a better way of doing quick visual Q&A on OpSim runs, rather than wade through lots of sky maps. And of course other things can be computed and presented like this as well (seeing, coadded depth, etc).