Either they necessitate a deceptive «God», e.g. creating starlight «in transit» which means that for some light the
star that supposedly sent said light would never have actually existed, or they would cause effect that should be evident but are not, e.g. temporarily fast starlight would effectively cook many things, such as life on earth, if the required light (and attendant
gamma radiation) were compressed into a significantly shorter time frame (think of the
radiation from the apparent 13 billion years of the universe arriving at the same time, or even over a 1000 years).
The detected burst is believed to have come
from one jet of particles and
gamma radiation that was fortuitously aimed towards the Solar System, one of two bi-polar jets which erupted
from the implosion of a massive
star that also created a black hole (see GRB animation).