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Large and Long Programs (LLP)

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Proposals for Gemini Observatory Large and Long Programs (LLPs) are accepted annually, with a Call for Letters of Intent to Propose issued in early December of the year preceding the start of the new programs.  New LLP proposals are now solicited for 2023. Letters of intent to propose are due on February 13, 9am HST, 2023. More information if given in the 2023 Call.

Large and long programs (hereafter "large programs" or LLPs) are Principal Investigator-defined and -driven programs that, as a guideline, either require significantly more time than a partner typically approves for a single program or extend over two to six semesters, or both. Large programs are expected to promote collaborations across the partnership's communities, to have significant scientific impact, and normally to provide a homogeneous data set, potentially for more general use. Proposals for Large and Long programs will usually be accepted annually.

The participating partners (currently US and Canada) will make available up to 20% of their time at each Gemini telescope for LLPs, over each of the next 6 semesters from the start of LLP execution. Principal Investigators (PIs) of LLPs must be based in an institution of one of the participating partner countries. There is no restriction on Co-Investigators. Potential investigators shall be encouraged to collaborate across the participating partnership. The LLPs are designed to enable large multi-partner collaboration programs and/or programs running across multiple semesters to be reviewed within a single time allocation process.

PIs who propose for LLPs have additional requirements, including submission of a letter of intent, development of a management and data plan, and consideration of added value to the astronomical community through data products, software, or other outcomes; Successful PIs must additionally report on their progress annually. Beginning with newly accepted LLPs in 2018, each program will be required to deliver processed data within one year of the end of the original LLP term, to be hosted on the Gemini Observatory Archive.

Subaru Intensive Program (SIP) time is available via the LLP process.

Questions and Answers

All questions concerning proposals, or any other subject, should be made using the Gemini HelpDesk. This web-based system will send the request to your National Gemini Office staff in the first instance who will then escalate it to Gemini staff if necessary.


Large and Long Programs (LLP) | Gemini Observatory


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