TINY POSSIBLE LENS
Are these tiny events to small to measure dark matter mass?
And should I be marking them?
Mark whatever you feel is a lens no matter how small which may translate to distance i.e. something that looks small may in fact be real large but at a great distance, so if you feel it is a lens I would say mark it.
by psaha scientist
Agree, if in doubt, mark! We can that assume all good candidates will be followed up at higher resolutions, and that HST will zoom in on the most interesting systems. HST resolution is 5-10 times finer than this survey.
Meanwhile, you can estimate the lensing mass already. For that you need to guesstimate the lens distance. The nearest known lensing galaxy (the Einstein cross) is just under 200 Megaparsecs, but a Gigaparsec would be more typical.