  We obtain the exact (confluent Heun) solutions to the massive scalar field in
a Gravity's Rainbow Schwarzschild metric. With these solutions at hand, we
study the Hawking radiation resulting from the tunneling rate through the event
horizon. We show that the emission spectrum obeys non-extensive statistics and
is halted when a certain mass remnant is reached. Next, we infer constraints on
the rainbow parameters from recent LHC particle physics experiments and Hubble
STIS astrophysics measurements. Finally, we study the low frequency limit in
order to find the modified energy spectrum around the source.
