A RSI broadcast on August 21, 2021 was dedicated to the summer solstice with the involvement of IRSOL, Specola, and MeteoSwiss.
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 (here 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.
Since January 1st 2021, IRSOL is affiliated to Università della Svizzera italiana (USI).
With the affiliation, the email addresses of the collaborators and the official homepage URL changed:
The new homepage URL is:
The collaborator email addresses have the form:
The Swiss Society for Astrophysics and Astronomy (SSAA) officially announced the attribution of the Edith Alice Müller Award 2020 during its assembly that was held online on 9 October 2020. The awards have been attributed to Dr Gioele Janett (IRSOL) and Dr Ewelina Orbzud (UNIGE) for their PhD thesis .
Janett successfully completed his PhD at IRSOL in 2019 with a thesis on
Numerical Methods for the Transfer Equation of Polarized Radiation
under the guidance of Prof. Siddhartha Mishra and Dr. Oskar Steiner.
IRSOL greatly congratulates the awardees.
During the 4th perihelion (the point closest to the Sun in an orbit) of Parker Solar Probe, a synergy of ground-based observatories around the world supported the spacecraft’s in-situ measurements by remote sensing.
This was made possible thanks to the lined up constellation between Earth, Parker Solar Probe and the Sun. The joined effort is embedded in the Whole Heliosphere and Planetary Interactions initiative. This is expected to draw a unique coherent picture of the complex energetic and magnetic structures reaching from the solar surface to the outer layers of the solar atmosphere.
The NASA coordinated mission Parker Solar Probe, a mission “to touch the Sun”, was launched in August 2018 to provide new insights on solar activity and how to improve space-weather forecasts. Since then, Parker Solar Probe is constantly monitoring it’s direct environment while getting closer and closer to Sun. During the 4th perihelion, Parker Solar Probe reached the outer part of the corona, filled with plasma and magnetic fields.
IRSOL joined the synergy by taking high-precision spectro-polarimetric data of the magnetic foot-points on the Sun. The measurements at IRSOL provide critical complementary information on the magnetic activity located in about 800 km height above the solar surface.
IRSOL data have been published here