Supernova (the red thing is not in any other surveys)

If you click on the map and follow the “Single exposures” link in the popup (, you will see all the individual exposures we took of this chunk of sky, in the “g” (blue), “r” (green) and “z” (red) filters. The bottom three are z – and you can see it slightly in all three, taken in 2016, 2017, 2018 – so not a supernova.

I think it doesn’t appear in SDSS because it’s quite red. The SDSS images show the g, r and i bands (rather than z band), and i is not as red as z; for a very red source, you would expect it to show up more strongly in the Legacy Surveys images. Plus they’re way deeper overall.


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That is not a #supernova but an #artifact.

Ine :stars::dizzy:


Oh, you’re right!, I missed that there were two nearby blobs in the image, one extremely red – the artifact.

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