WHT
At the WHT, all 3 modes (MOS, LIFU, mIFUs) of the new multi-object spectrograph WEAVE are offered for open-time observations (30% of the total time available for science) during 2026B. Commissioning of the mIFU mode is currently under way, and this mode is offered shared-risk. For WEAVE, 2026B covers observations from 1 Nov 2026 to 30 Mar 2027.

WEAVE has been in regular use for LIFU science since early 2024.

On current plans, WEAVE will remain on the telescope throughout 2026 and 2027, so observations will not be possible with the Cassegrain instuments (ISIS, LIRIS, ACAM) or with visiting instruments at any WHT focus, during this period.

INT
Visitor-mode observations at the INT ceased in mid-June 2024, and the telescope has been refurbished and roboticised, prior to installation of the HARPS-3 exoplanet hunter in 2025. Shared-risk open-time observing with HARPS3 is offered in 2026B.

Notes
The latest news about the ongoing evolution of the instrumentation suite at the WHT and INT can be found on the ING instrumentation update page.

Information about how to apply for telescope time can be found on the applying for telescope time page.

Information about pre-WEAVE WHT instruments not offered in 2026 and 2027 (e.g. ISIS, ACAM) is linked from a previous version of this page. Information about instruments no longer offered at ING can be found on the page about past, present and future instruments.