1st- and 2nd-light CALLISTO solar radio spectrometer at IRSOL
Istituto ricerche solari Aldo e Cele Daccò
It took exactly two years after instrument commissioning to finally get 1st- and 2nd-light at the very same day with CALLISTO at IRSOL. Obviously, the Sun started to get active in terms of radio radiation at decametre wavelength (45-70 MHz). Following the NOAA Space Weather Prediction Center classification, the instrument observed twice a small group of type III bursts. Type III radio bursts are a group of fast drifting radio emissions associated with solar flares. These radio emissions are believed to be excited at the fundamental and second harmonic of the electron plasma frequency. Solar type III radio bursts are an important diagnostic tool in the understanding of solar accelerated electron beams. They are a signature of propagating beams of non-thermal electrons in the solar atmosphere and the solar system. Consequently, they provide information on electron acceleration and transport, and the conditions of the background ambient plasma they travel through.
Christian Monstein
