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Originally Posted by Ken G
Furthermore, their "lower limit" for the quantum gravity scale is at least 4 orders of magnitude below the expected Planck scale, so on the surface that would seem to render their null result pretty irrelevant. I'm not sure how the MAGIC observation manages to probe to such a more precise level.
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MAGIC looks at far higher energies than HETE does. When the effect is energy dependent, that translates to higher sensitivity.
Oh, and an experiment that says "we looked at this, and we saw nothing unexpected" is still a good thing. It would be very unwise not to look because we expect to see nothing.