Access to some telescopes is granted though specific agreements between the IAC and external institutions or consortia. The data are available to the IAC community through collaboration with the PIs

The night “Comisión de Asignación de Tiempos” (CAT) evaluates the observing proposals that guarantee to the Spanish community access to the majority of the night telescopes at the “Observatorios de

About 5% of the observing time in all telescopes of Roque de Los Muchachos Observatory and STELLA Robotic telescopes is also offered for International Time Program (ITP), which is allocated by the