Light curve Archive

All daily light curve determined using the full disk images in the center of the H Alpha line acquired by INAF - Catania Astrophysical Observatory from 2022 up today are available in this page. When the weather conditions permit, the light curve is obtained with an average cadence of one image per minute.

The light curve describes the trend of the average brightness of the solar disk of the recorded H Alpha images. The signal is normalized by the exposure time. The light curve takes into account the approximation model for solar intensity vs air mass proposed by Meinel & Meinel (1976). The air mass as function of the zenith angle of the Sun has been computed by the model of Kasten & Young (1989).

The images are stored thanks to the support of the Italian Center for Astronomical Archives of INAF.