Elckerlyc
"Philosophy will clip an angel's wings."
I have read A Brief History of Time.You cannot have a universal time system as the same event is different for every observer. (A Brief History of Time by Stephen Hawking is accessible too.)
In what I described above there is only one observer, namely the base (planet/spaceport/whatever) where the pulsar is observed. This observation is than broadcast through the Ansible, which is a simultaneous communication device. In other words allows instantaneous observation.
Now, the Ansible (a reference to The Dispossessed by Ursula Le Guin) is fantasy, granted. But the topic we are discussing in this thread is basically fantasy. Space opera ignores the known limits and assumes it is possible to travel faster than light or have ways of instantaneous communications and have immediate contact with other species.
In a way Space Opera is fantasy, not SF.
This is what I originally wanted to express in my post, namely that we will never have a need for a universal measure of time, imprisoned as we are in our solar system. Once you imagine or fantasize it is possible go out and explore the galaxy, you have in the same stroke allowed for a way to ignore Einstein and Hawking.