Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.252..113k&link_type=abstract
Nature, vol. 252, Nov. 8, 1974, p. 113, 114. Research supported by the Department of Space of India.
Astronomy and Astrophysics
Astronomy
3
Cosmic Rays, Gamma Rays, Ionospheric Propagation, Lower Ionosphere, Radiation Effects, Radio Transmission, Bursts, D Region, Electron Density Profiles, Particle Production, Satellite Observation, Very Low Frequencies, X Ray Astronomy
Scientific paper
The effects of gamma-ray bursts on the VLF propagation characteristics in the D-region of the ionosphere are considered. The recorded field strength data shows no observable field strength variations associated with any of the burst events. Estimates are made of (1) the electron production rates in the D-region for a typical event for which spectral data is available above 7 keV and (2) the electron production rates for different heights for the two intensity peaks observed in the bursts. Results show that for the type of bursts detected, the ionospheric effects are too weak for observable perturbations in the VLF propagation to occur.
Chakravarti S. C.
Kasturirangan K.
Rao U. R.
Rastogi R. G.
Sharma Darma P.
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