I investigated diff_id 65024, skycell 1383.111 to find out some of the causes of the false Mops Detections. 

The following is a rough count of the different classifications of detections:

||type || number ||
||burntool || 49 ||
|| cosmic ray || 20 || 
|| star wing || 88 || 
|| star core || 37 ||
|| "ok" || 40 ||

"ok" is misleading. "ok" refers to things that look like stars - and some might be real things, but most are not. I did not investigate further. Most, when I investigated further, ended up being cosmic rays that were convolved into roundish stars.  

Here are some examples from each of the categories.
= Burntool =
There are 4 detections on this burn.

[[Image(mopsburntoolf.png)]]

= Cosmic ray hit =
There are 2 cosmic rays here, each resulting in a detection.

[[Image(mopscrf.png)]]

= Star wings =
2 bright stars, the wings are detected (also, a burntool in the far right)

[[Image(mopsstarwingsf.png)]]

= Star cores =
These are subtractions that are not quite lined up.

[[Image(mopsstarcoref.png)]]

= "OK" =
Sometimes these are real, most of the time these are actually not real (if you look at the warps).

[[Image(mopsokf.png)]]