Nearby host NGC4058 not picked up correctly - needs some thought

[smarttgit]

https://star.pst.qub.ac.uk/sne/atlas4/candidate/1120528491503139300/

NGC4058 is not selected as the correct host.
The SDSS spectroscopic source which is a knot in the galaxy is labelled as the host, but NGC4058 is not.

Faint transients in nearby galaxies will be very common in LSST, we need to get a robust way of associating them.
Maybe we need a custom list of all galaxies which are D < 50 Mpc (maybe it should be 30Mpc, but let's see) and define an ellipse within which all transients are associated.

This is not so easy, as the larger the search radius, the more background SNe we will get. So let's think how we implement this