The 5% International Time Programme is open for the next semesters 2026B and 2027A: deadline at 23:59UTC of March 9, 2026

The international Scientific Committee of the Canary Islands Observatories (CCI) invites applications for the International Time Programme (ITP) on the telescopes installed at the Observatory of Teide and Roque de Los Muchachos.

Details to the call and the proposal form can be found on their web page.

The current call (for the next 2 semesters and starting with semester 2026B=AOT54) is open until 23:59 of March 9, 2025.

Proposals for ITP observing time must be submitted through the web-based system: https://proposals.iac.es/. Before preparing a proposal, users must register on the platform and select the ITP call.

Proposals must have principal investigators astronomers from one of the seven CCI signatory countries (Belgium, Finland, France, Germany, Italy, Spain, and the United Kingdom). Please note that the Principal Investigator and Co-Investigators must together represent at least three of the countries mentioned above. In addition, applicants are expected to explain why the requested observing time does not fit within the normal allocation scheme of the facilities. Apart from the TNG the call includes opportunities to use the GTC, WHT, NOT, LT, STELLA and Mercator telescopes.

Proposals that need frequent monitoring of targets and would like to participate in Time Sharing will have to carefully follow the rules that are actually in force at the TNG, available at the following link.

The PIs are kindly asked to contact the TNG staff to discuss available instruments and for an initial technical appraisal on the feasibility of their proposed observations. For the TNG, 15 nights per year (two semesters) are offered, but no more than eight nights can be requested in one semester.

Contact the CCI Secretary for further information and an application form (cci@iac.es) or download it.