Looks like a supernova


It’s been awhile since I’ve been here, so I’ve forgotten how to access the other layers to check if this is transient.

If you click on the map, there’s a “Single Exposures” link that will show you cutouts of all the individual exposures we have – in this case, many spanning 4 years or more, and it’s present in all of them, so probably just a super blue star, not a SN!

my general rule of thumb f it is bright blue then i take it as a local star in our galaxy

Cyan things, yeah, are often hot stars. “Pure blue” things are often artifacts or transients.

yes but the colours are computer generated

The spot is visible in SDSS so it can’t be a #transient. Because the DECaLS survey and SDSS are about ten years apart.

Thanks for pointing this out. It’s been awhile since I looked at these. A simple check of images at different times would have shown it to be too enduring to be a supernova.