Likely stellar sources ... but with slim chance of being a SN

[thespacedoctor]

For sources like this one:

https://star.pst.qub.ac.uk/sne/atlas4/candidate/1184517780622221300/

Sherlock punts for a SN classification as there's a small chance it is truly associated with the nearby galaxy, however, the flux is much more likely to be associated with the underlying stellar source (as in this specific case). I would like to make this information more readily available to human users without changing the top-level 'SN' classification. Lasair, ATLAS and PanSTARRS only report the top-rank classification but they all present the human-readable annotation. This is where I can add some nuanced info.

This is the current annotation for the object above:

The transient is possibly associated with NGC6673; a 12.57 mag galaxy found in the NED_D catalogue. It's located 274.13" S, 78.48" E (14.9 Kpc) from the galaxy centre. A host distance of 10.8 Mpc implies a m - M = 30.17.

But this could instead read:

The transient is most likely associated with 18451763-6222241; a J=14.43 mag stellar source found in the 2MASS/GAIA catalogues. It's located 0.44" N, 0.19" W from the stellar source centre. However, it may possibly be associated with NGC6673; a 12.57 mag galaxy found in the NED_D catalogue. It's located 274.13" S, 78.48" E (14.9 Kpc) from the galaxy centre. A host distance of 10.8 Mpc implies a m - M = 30.17.