In the OSGI console (/system/console/events) the last 200 (?) OSGI events are listed. Perform the replication action on author and then check on the author the OSGI events; very likely an event is listed for it (not 100% sure, it's been a while since I used that).
If you find an OSGI event, just be aware, that such an event might the sent for every replication action (if you have multiple publish instances).
Jörg