Ionospheric effects of the cosmic gamma ray burst of 29 March 2003

Details Ionospheric effects of the cosmic gamma ray burst of 29 March 2003 Ionospheric effects of the cosmic gamma ray burst of 29 March 2003

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3218807m&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 18, CiteID L18807

Astronomy and Astrophysics

Astrophysics

3

Ionosphere: Ionospheric Disturbances, Radio Science: Radio Wave Propagation, Solar Physics, Astrophysics, And Astronomy: X-Rays, Gamma Rays, And Neutrinos

Scientific paper

We present evidence for ionospheric effects caused by the gamma ray burst that originated at a cosmological distance. At the time of the strong cosmic gamma-ray burst of 29 March 2003 (GRB030329) that took place in the nighttime in Japan we observed a transient decrease in the strength of the radio noise coming from extraterrestrial sources (cosmic noise) at 38 MHz. We also observed a sudden field-amplitude decrease of an 8.006 MHz transmission signal recorded at a distance of 690 km from the transmitter. These phenomena are interpreted as a result of an ionospheric absorption enhancement due to transient ionization caused by GRB030329. We also report no appreciable effect on the ionospheric electron column content derived using GPS (Global Positioning System) microwave signals.

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