Jupiters Synchrotron Radiation at 50 MHZ measured by the large Jicamarca Radio Observatory Antenna

The large 50 MHz antenna of the Jicamarca Radio Observatory (300mx300m) has been used to observe and measure Jupiters synchrotron radiation. Previously, the lowest frequency used to observe this radiation has been 80 MHz, with a much smaller antenna. Our measurements show that the level of radiation is below the sensitivity of the system used. Thus, we were capable of establishing an upper level limit for radiation at this frequency and found it to be several dBs below the expected level derived from a smooth extrapolation of its spectrum.