Physics – Space Physics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ijrsp...4..203k&link_type=abstract
(Symposium on Earth's Near Space Environment, New Delhi, India, Feb. 18-21, 1975.) Indian Journal of Radio and Space Physics, vo
Physics
Space Physics
Gamma Rays, Ionospheric Disturbances, Variable Stars, X Ray Stars, Energy Spectra, Ionospheric Electron Density, Novae, Particle Production, Very Low Frequencies
Scientific paper
The ionospheric effects arising from the transient celestial events at X-ray and gamma-ray energies typical of flare stars and cosmic gamma-ray bursts are investigated. The VLF data recorded at Ahmedabad, corresponding to the 164 kHz transmission from Tashkent, are studied to see whether any observable effects are time-coincident with the meridional transit of the flare stars Cen X-4 and Cet X-2 at the time of the intensity maximum of their flare states. The VLF data are also examined with respect to the cosmic gamma-ray bursts detected by Vela, IMP-6 and OSO-7 satellites. Theoretical computations are carried out for the estimation of electron density enhancements, using available data on intensities and energy spectra for these events. The observational results are interpreted in terms of these theoretical calculations.
Chakravarty S. C.
Kasturirangan K.
Rao U. R.
Rastogi R. G.
Sharma Darma P.
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