Gamma ray burst triggers at daytime and night-time interface

Details Gamma ray burst triggers at daytime and night-time interface Gamma ray burst triggers at daytime and night-time interface

2009-01-13

arxiv.org/abs/0901.1832v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

7 pages, 12 figures

Scientific paper

There is a difference between the solar ionization concentration in the ionosphere in the daytime and at night-time. At night the E-region ion concentration peak is dramatically reduced due to chemical losses and the rapid change in the vertical polarization electric field at the time around sunset, which is due to the accelerating neutral wind dynamo and which produces a corresponding change in the zonal electric field through curl-free requirements. The result is the formation of a layer of high conductivity, at the daytime-night-time interface. This phenomenon in the South Atlantic Anomaly (SAA) area, provokes an increase in the precipitation of charge particles which is well known and is commonly termed "sunset enhancement". In the following we show five gamma ray burst (GRB) triggers observed by spacecraft GRB detectors in temporal coincidence with muon enhancement observed at ground level by the Tupi telescopes with two different orientations at $\sim 21$ UT (local sunset), and located inside the SAA region. Of these GRB triggers analyzed here, one from Swift, and two from Fermi are probably noise triggers, produced by omni-directional particle precipitation, during the sunset enhancements.

Affiliated with

Also associated with

No associations

Rating

Gamma ray burst triggers at daytime and night-time interface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Gamma ray burst triggers at daytime and night-time interface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma ray burst triggers at daytime and night-time interface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-72377