Call for observing proposals
For Semester 2027A, running from 1 March 2027 until 31 August 2027, this call for proposals for observing time on GTC has been opened.
The submission deadline for this call is 2 October 2026 (11:00 UT)
Director's Discretionary Time at the GTC (GTC-DDT) can be requested at any time by members of the GTC community (Spain, Mexico and the University of Florida).
Previous calls
A full list with previous calls for proposals for GTC can be found here.
Last modified: 22 September 2026
