Fermi GBM Observations of TGFs (Invited)

Details Fermi GBM Observations of TGFs (Invited) Fermi GBM Observations of TGFs (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmae31a..04b&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #AE31A-04

Physics

Plasma Physics

[3304] Atmospheric Processes / Atmospheric Electricity, [3324] Atmospheric Processes / Lightning, [7554] Solar Physics, Astrophysics, And Astronomy / X-Rays, Gamma Rays, And Neutrinos, [7845] Space Plasma Physics / Particle Acceleration

Scientific paper

In its first fourteen months of observation, the Gamma-ray Burst Monitor (GBM) on the Fermi Gamma-Ray Space Telescope has observed 17 TGFs. The thick bismuth germanate (BGO) detectors are excellent for TGF spectroscopy, having a high probability of recording the full energy of an incident photon and recording a large number of photons per TGF. A variety of time profiles and spectra have been observed. The spectra of some GBM TGFs have strong 511 keV lines, indicating that these TGFs contain a large fraction of positrons.

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