Specifically from paper: The live/dead mice (and container) were all held at 37C, which google tells me is a normal mouse body temp. And, the observed light does not match the spectrum of black body radiation expected for the temps at which images were taken or subjects were held.
Also strange: The effect changed w/ injury or anesthetic treatment according to the abstract.
Also strange: The effect changed w/ injury or anesthetic treatment according to the abstract.