Also, due to its distance - 300 million light-years away - data from this explosion should have also revealed a measurable difference in the polarization between low- and high-energy gamma-ray photons.
Alas, no polarization difference was detected.
Some theories predict the quantum graininess should manifest itself at scales of around 10-35 meters - a scale known as the Planck length, the fundamental scale for quantum dynamics. Through the precise nature of its polarization measurements, Integral hasn't found any quantum graininess down to a scale of 10-48 meters; that's 10,000,000,000,000 times smaller than the "fundamental" Planck length.
So, if quantum predictions are correct, the spacetime quanta must be made from grains that are 10-48 meters in scale or less.
What does this mean?
Holographic Universe... or Not?
For Hogan's interpretation of the GEO600 results to be correct, this graininess should be measurable over larger scales. In fact, GEO600 started to detect quantum fuzziness at scales of around 10-16 meters - that's 10,000,000,000,000,000,000 times larger than the Planck length.