One reason why I've never really done any #JWST processing was the awful 1/f noise (banding) that's typical to the Stage 3 products from MAST.
I finally got around to installing the JWST pipeline locally, and reprocess these data with tweaked parameters. 🔭

Last night, NASA's Perseverance rover looked up at the night sky once more, to capture interstellar #comet 3I/Atlas flying by the red planet.

The distance was "only" 0.2 AU or 30 Mio km, far closer than the comet ever got to Earth. 🔭 #3IAtlas

Credit: NASA/JPL-Caltech/ASU/Simeon Schmauß

Well, forget what I said, turns out you can process marsrover images on the train too :)

There is a super faint smudge where comet 3I/Atlas should be. The new orbit parameters in Stellarium are a pretty good match. 🔭 #3iatlas

Here I have stacked the ten available observations from Mastcam-Z to bring out even more stars.

Comet 3I/Atlas is also in the frame, but unfortunately I wasn't able to pull it out of the noise...

Last night, NASA's Perseverance rover attempted to photograph the interstellar comet 3I/Atlas from the surface of Mars.

A first look at the image sequence shows some stars in the constellation Hercules where 3I/Atlas is currently located. 🔭

The overexposed area can be recovered by going down to the l1b products. They contain the individual frame groups that make up a JWST integration which is part of one exposure...
The paper used only the first groups which weren't overexposed.

mast.stsci.edu/portal/Mashu...

NASA/ESA/CSA/STScI