Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4858..296l&link_type=abstract
Particle Astrophysics Instrumentation. Edited by Peter W. Gorham. Proceedings of the SPIE, Volume 4858, pp. 296-304 (2003).
Astronomy and Astrophysics
Astrophysics
Scientific paper
The FORTE satellite records bursts of electromagnetic waves arising from near the Earth's surface in the radio frequency (RF) range of 30 to 300 MHz with a polarization-selective antenna. We investigate possible RF signatures of ultra-high energy cosmic rays (UHECR), including Cherenkov radiation in ice, UHECR-triggered lightning emission, incoherent bremsstrahlung of the ionization trail, and direct geomagnetic synchrotron radiation from the high-energy particles in the shower. The FORTE database consists of over 4 million recorded events to date, and may include a significant number associated with cosmic rays near or beyond the Greisen-Zatsemin-Kuzmin (GZK) cutoff. As a first stage of investigation, we search for FORTE events in the period from September 1997 to December 1999 which can have been produced by Cherenkov VHF radiation from a UHE neutrino shower in the Greenland ice sheet. After application of several background rejection methods, one event is left that requires further investigation.
Gorham Peter. W.
Jacobson Abram R.
Lehtinen Nikolai G.
Roussel-Dupre Robert A.
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