Researchers tracked mysterious FRB to the distant dead galaxy.

"Discovering a fast radio burst in an old, distant galaxy challenges the belief that these events are exclusive to young, vibrant galaxies, suggesting a deeper, cosmic puzzle about their true origins and mechanisms. Credit: Photo courtesy of CHIME, with background edited by MIT News" (Mysterious Space Signal Traced Across the Universe to an Ancient Dead Galaxy)

There are models that black holes can stretch things like X- or gamma-rays into longer wavelengths. That thing means that the FRB can form when black holes stretch X- or gamma-rays. Changes in wavelength can turn X-or gamma rays into radio waves. In that model, the gravity center can pull other wavelengths longer. 

The idea of antigravity is a similar case. The idea is that the gravity wave can be very high energy radiation that originates in a very small structure in a material. When those waves travel against other waves like electromagnetic waves. They just pull a little bit of energy out of those waves. That means the other parts of the field try to fill that energy ditch. That means the field pulls particles and radiation with it.  The gravitational erasing requires that the wave movement that pulls energy out of fields will stretch into another form. 

The mysterious fast radio burst, FRB, is tracked to the distant dead galaxy. FRB 20240209A has an origin in an ancient galaxy 2 billion light-years from Earth. The active star formation in that galaxy ended and the source of that FRB is a very high massive object, calculated over ten times as massive as the Sun. 

That thing causes theories that the FRB 20240209A was something else than a radio burst before it turned into the FRB. Black holes are extremely high-massive objects. Their gravitation stretches light the same way as redshift. If the black hole is behind some gamma- or X-ray or visible light it stretches that wave movement. That means that the wave movement can turn longer. So the gamma-rays or X-rays can stretch to the longer wavelengths. And that means gravity can explain some FRBs. 

It's possible. Black holes can turn their gamma-ray beams into other radiation types simply by stretching the wave movement that they send. That means that a high-power gravity field can turn the X- or gamma rays into IR or even radiowaves. That model means that if gravity waves are shortwave radiation that travels through another wave movement or wavelength the black hole can turn even gravity opposite. The idea is that the black hole pulls the gravity waves longer. 

The idea is that the gravity wave's origin is in a very small structure in material. The diameter of the sender of that radiation is so small, that it's hard to see those waves. When the gravity wave travels through the other waves it takes part of the energy of the "larger waves" with it. And we see that thing as a traveling ditch. Gravity is like water flow that travels near the bottom and the higher waves are above that thing. If that flow is closed that means there is no gravity in that area. 

https://scitechdaily.com/mysterious-space-signal-traced-across-the-universe-to-an-ancient-dead-galaxy/