Evidence for Primordial Black Hole Final Evaporation: Swift, BATSE and KONUS and Comparisons of VSGRBs and Observations of VSB That Have PBH Time Signatures

Understand

More than a decade ago we identified a class of VSGRB (T90 < 100 ms) as having unusual properties: (1) galactic position asymmetry, (2) very hard gamma spectrum, (3) possible evidence for galactic origin of these events.

• We now study the recent Swift data and show that a VSGRB enhancement consistent BATSE and KONUS exists.
• We estimate that this is now a total 4.5sigma observation.
• We then study the VSB for evidence of the time structure expected for PBH evaporation.