IAC80, NOT, TCS, TNG Requesting time form Scheduled nights LT (see below) Requesting time form Reactive time   Current Service Proposals at INT, TNG, NOT, TCS.   LT Reactive Time: up to a maximum of 6 h for the CAT in semester 2023B (1 Jul 2023 – 29 Feb 2024). LT Reactive Time: up to a maximum of […]

The deadline for the submission of proposals for Spanish CAT night observing time for semester 2017A is Tuesday, 4 October 2016, at 17 h Canarian local time. The call for collaborative proposals between Spanish and Mexican astronomers at the GTC (Spanish/Mex Time, see below) is also open, with the same deadline. We recall that every proposal within the Spanish CAT scheme must be […]

The International Scientific Committee (CCI) of the Canarian Observatories requests the users of telescopic installations sited at the Roque de los Muchachos and/or Teide Observatories, to make the corresponding acknowledgement in articles resulting from the observations carried out on these telescopes. WHT, INT, TNG, NOT, Liverpool, Mercator, Stella. This acknowledgement should be made either with a foot […]

IACNordic collaborative time (NOT) This scheme has been discontinued. No call for proposals under the framework of IACNordic collaboration will be issued. <What comes next is obsolete information. It is included here for historical reasons and in case that authors need the full text of the Acknowledgements for papers containing data obtained via this collaborative time.>Following […]

DDT WHT, INT, NOT, TNG Application form Available nights   DDT proposals are accepted for every night allocated as Service Time on the NOT, TNG, and INT. For the WHT, DDT nights are scheduled exclusively as CAT DDT (see available nights). Full and half nights can be requested for DDT programs. These proposals can be […]

GTC DDT request form We are pleased to announce the availability of Director Discretionary Time (DDT) at the 10.4m GTC facility (GTC-DDT), which includes up to 10 nights per semester. To be eligible for GTC-DDT time, a proposal must pursue exceptional and high impact scientific goals and fall within one of the following categories: be an unforeseen phenomenon of […]

The graphs below are automatically created by the CAT application tool. The oversubscription factors are computed as the ratio between the total requested time and the total time allocated by the CAT on each semester. The latter include the time allocated to Target of Opportunity Programmes (ToOs). Figures are given in nights, where one night […]

Regular and Large programs approved per telescope and semester before  semester 2026A GTC GTC (IAC-Flor) GTC (IAC-Mex) WHT INT NOT NOT (IACNord) TNG LT Mercator Stella TCS IAC80 TTT Large Programs 2026A     2026A   2026A   2026A 2026A 2026A   2026A   2026A  none 2025B     2025B   2025B   2025B 2025B […]

This page lists override programs which may be activated during nights allocated through the CAT (Spanish TAC) on any of the telescopes on the Observatorio del Roque de Los Muchachos and the STELLA Robotic Telescope on Observatorio del Teide. As a general rule, observers can be overriden only by Target of Opportunity (ToO) programs that […]