What is you exposure time per frame? And does Iris give any magnitude comparisons to check? The worst thing about Pluto/charron events is their massive uncertainty. I think OW rather understates that.
This is a really hard one to confirm. Massively faint, low mag drop and no correlation to other observations (because there weren't any). A very bold attempt Roger and don't be dissapointed if it doesn't get accepted - but don't give up either
Thankfully, 90% of events will be easy...