NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
GBM Observations of Terrestrial Gamma-Ray FlashesThe TGF detection rate of Gamma-ray Burst Monitor (GBM) has been increased twice since launch. The most recent improvement is from a new operating mode in which data for individual photons are down-linked for selected portions of the orbit, enabling a more sensitive ground-based search for TGFs. The new search has increased the TGF detection rate and is finding TGFs more than five times fainter than the TGFs of the previous GBM sample. We summarize the properties of the original GBM TGF sample and compare to the less intense TGFs now being detected. In addition to gamma-ray TGFs, GBM is observing distant TGFs from the propagation of charged particles along geomagnetic field lines. Strong 511 keV annihilation lines have been observed, demonstrating that both electrons and positrons are present in the particle beams. Spectral fits to these electron/positron TGFs will be shown.
Document ID
20110007268
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Briggs, M. S. (Alabama Univ. Huntsville, AL, United States)
Fishman, G. J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Connaughton, V. (Alabama Univ. Huntsville, AL, United States)
Bhat, P. N. (Alabama Univ. Huntsville, AL, United States)
Paciesas, W. S. (Alabama Univ. Huntsville, AL, United States)
Preece, R. D. (Alabama Univ. Huntsville, AL, United States)
Wilson-Hodge, C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Chaplin, V. L. (Alabama Univ. Huntsville, AL, United States)
Kippen, R. M. (Los Alamos National Lab. NM, United States)
vonKienlin, A. (Max-Planck-Inst. Germany)
Meegan, C. A. (Universities Space Research Association United States)
Date Acquired
August 25, 2013
Publication Date
December 13, 2010
Subject Category
Astronomy
Report/Patent Number
M11-0072
Meeting Information
Meeting: 2010 American Geophysical Union (AGU) Fall Meeting
Location: San Francisco, CA
Country: United States
Start Date: December 13, 2010
End Date: December 17, 2010
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available