Measuring Hawking Radiation from Black Hole Morsels in Astrophysical Black Hole Mergers

We show that it is possible to observe the Hawking radiation emitted by smallblack holes assumed to form in catastrophic astrophysical events such as blackhole mergers. Gamma ray bursts in the TeV range are unique footprints of theseasteroid-mass black hole morsels ejected during the merger. The time delay ofthe gamma ray bursts from the gravitational wave event is correlated to themass distribution of the morsels. The integrated mass of the morsels allowed bythe unaccounted merger mass leads to a Hawking induced radiation in photonsthat is above the sensitivity of atmospheric Cherenkov telescopes such as HESS,LHAASO and HAWC.