Temporal and spectral characteristics of terrestrial gamma flashes

Details Temporal and spectral characteristics of terrestrial gamma flashes Temporal and spectral characteristics of terrestrial gamma flashes

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..384..990n&link_type=abstract

Gamma-ray bursts: 3rd Huntsville symposium. AIP Conference Proceedings, Volume 384, pp. 990-994 (1996).

Computer Science

Gamma-Ray

Scientific paper

We have analyzed the BATSE high time resolution data for several terrestrial gamma flashes (TGFs) to characterize this newly identified phenomenon, which may be related to atmospheric lightning. The minimum timescale for TGF variability is 40-250 μs. In general, TGFs are spectrally much harder than cosmic gamma-ray bursts (GRBs), but as in GRBs, pulses within a TGF tend to peak earlier at higher energies and can have different spectra. Spectra for several TGFs were examined and found to be better fit in the 25-500 keV range by a power-law than a black body model. From empirical comparisons, we speculate that if TGFs are related to known high-atmospheric lightning events, then they are more probably related to red sprites than to blue jets or trans-ionospheric pulse pairs.

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