I have returned from studying wave theory from a sailboat off both Florida coasts. East and West.
Waves are much larger (more amplitude) about 30 miles off Miami when a NNE wind is blowing. However the apparent frequency stays the same. On the boat, not necessarily on the beach.
TCR--- Fred Hoyles "tired light" hypothesis has also been observed in radio transmissions from NASA's "Voyager" and has been mentioned in the tech reviews to point out one place where the effect can be observed. As Voyager travels farther from us the radio waves are red shifted (or otherwise weakened) past the limits of our ability to get information from them.
Problem is that nowhere can I find the arithmetic that would predict how fast light would get tired. Without that little piece of information then the claim (belief?) that the universe is expanding is baseless. ie. religious.
Perhaps a radio techie would know this
Since there are several effects that cause light to lose energy ie "red shift". They are, but not limited to, gravitational effects, (climbing out of a gravity well, speed of time, mechanical effects (space dust) Doppler effects (actual relative motion) dispersion and probably others including perhaps inertial losses---- And since the red shift is so far off when massive objects are concerned (particularly around quasars and you mentioned neutron stars) then I wonder why hasn't this effect been quantified. At least to us peons.
Why is the radiation from an accretion disc not important? As far as I know gravity is directional but unfocussed. From our point of view anything in the neighborhood of the quasar would be affected by its gravity fields. Including EMR of whatever length.
Damn I'm suspicious
Or perhaps I should not try to understand God's mysterious ways