Project: RGB cutouts

[drphilmarshall]

Here's an idea for a nice visualization tutorial: take Robert Lupton's RGB image demo and extend it in the following ways:

• Improve the markdown cells following the Stack Club template, and explain what is going on in each step.
• Wrap the image cutout generation in a function, like in the DESC postage stamp demo.
• Show what the various control parameters of the RGB-making function do, by animating the plots (or generating a grid, or something).

[bechtol]

Other example functionality that might be nice to show:

• Use the WCS projection to show the image in celestial or Galactic coordinates and label the axes appropriately for that coordinate system
• Overlay catalog objects with their footprints / ellipses
• Subtract models for catalog objects and visualize the residuals. This could be helpful to evaluate deblending, for example