Nature of the ultrarelativistic prompt emission phase of GRB 190114C

We address the physical origin of ultrarelativistic prompt emission (UPE) phase GRB 190114C observed in interval 1.9-3.99 s, by Fermi-GBM 10 keV-10 MeV . Thanks to high S/N ratio data, a time resolved spectral analysis has evidenced sequence similar blackbody plus cutoff power-law spectra, on ever decreasing intervals during entire UPE phase. assume that phase, inner engine GRB, composed Kerr black hole and uniform test magnetic field B0, aligned with BH rotation axis, operates an overcritical field. infer $e^+e^-$ pair electromagnetic plasma presence baryon load, PEMB pulse, originating from vacuum polarization quantum process engine. This initially optically thick self-accelerates, giving rise at transparency radius radiation Ferm-GBM. At trf > 3.99 electric becomes undercritical, classical electrodynamics regime generate GeV emission. During both processes, we determine varying mass spin engine, fulfilling Christodoulou-Hawking-Ruffini mass-energy formula. For first time, quantitatively show how extracting rotational energy BH, produces series pulses. follow sequences bins. compute Lorentz factors, loads radii transparency, as well value field, assumed be constant each sequence. The fundamental hierarchical structure, linking regime, is characterized blackholic quanta timescale $t=10^{-9}$s, $E=10^{45}$ erg.