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Radio Physics and Radio Astronomy

ISSN Print: 2152-274X
ISSN Online: 2152-2758

Archives: Volume 1, 2010 to Volume 3, 2012

Radio Physics and Radio Astronomy

DOI: 10.1615/RadioPhysicsRadioAstronomy.v3.i4.10
pages 279-284

AN UNUSUAL SOLAR BURST AT DECAMETER WAVELENGTHS. 1. OBSERVATIONS

A. I. Brazhenko
Poltava Gravimetric Observatory, Subbotin Institute of Geophysics National Academy of Sciences of Ukraine, 27/29 Myasoedov St., Poltava 36029, Ukraine
V. N. Melnik
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
Alexandr A. Konovalenko
Institute of Radio Astronomy of the National Academy of Sciences of Ukraine
V. V. Dorovsky
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
A. V. Frantsuzenko
Poltava Gravimetric Observatory of the Institute of Geophysics, National Academy of Sciences of Ukraine, 27/29, Miasoedov St.,Poltava,36029
H. O. Rucker
Institut für Weltraumforschung der Österreichischen Akademie der Wissenschaften, 6, Schmiedlstrasse, Graz, 8042, Austria
M. Panchenko
Institut für Weltraumforschung der Österreichischen Akademie der Wissenschaften, 6, Schmiedlstrasse, Graz, 8042, Austria
A. A. Stanislavsky
Institute of Radio Astronomy, National Academy of Sciences of Ukraine

ABSTRACT

An unusual burst was observed with the UTR-2 (Kharkiv, Ukraine) and URAN-2 (Poltava, Ukraine) radio telescopes on June 3, 2011. It was recorded in the frequency band 16 to 28 MHz. Its frequency drift rate (about 500 kHz/s) was positive at frequencies higher than 22 MHz and negative with drift rate 100 kHz/s at lower frequencies. The halfpower duration of this burst was about the same at all frequencies and made 17−22 s. The fine frequencytime structure was unusual, too. The maximum radio flux of the unusual burst at 24 MHz was about 103 s.f.u., and its polarization was negative making about 10 %. An interpretation of the unusual burst is suggested.