Click here for the latest Call for Proposals

Deadlines for submission:

Standard proposals

[A] semester (Feb 1 – Jul 31): Last day of September of the previous year
[B] semester (Aug 1 – Jan 31): Last day of March of the current year

Director's Discretionary Time

Cerro Tololo (proposals accepted at any time)
Gemini (proposals accepted at any time)

Other types of proposals

Gemini Fast Turnaround Program (deadline for proposal submission on last day of each month)
Gemini Poor Weather Programs (proposals accepted at any time)
Gemini Large and Long Programs (check website for current status)
NOIRLab Survey Programs (check website for current status)



How do you apply for observing time?

Proposals for standard observing programs at all NOIRLab facilities, at partner facilities, and at private facilities that provide some open-access time through the NOIRLab time allocation process, can be submitted twice each year. Deadlines are the last day in September for the following “A” semester (Feb 1 – Jul 31) and the last day in March for the following “B” semester (Aug 1 – Jan 31). Survey programs are accepted annually or when sufficient time is available for new programs. Investigators must submit a letter of intent in advance.

Time Allocation Committee (TAC)

The NOIRLab Time Allocation Committee (TAC) meets semi-annually to advise the NOIRLab Director on the allocation of telescope time. The TAC comprises seven broad discipline-based panels plus special panels to handle survey or other proposals. TAC members are appointed by the chair of the NOIRLab TAC process.

Gemini TAC

The Gemini Time Allocation proceeds in two phases, first at the National TAC (NTAC) level for each individual partner, then by the International TAC (ITAC), which merges the proposals to create a single combined list of programs for execution.


NSF's NOIRLab offers the opportunity to conduct major survey programs of up to 3 years in duration. Up to 20% of the observing time available through NOIRLab may be allocated to Survey Programs.