MegaCam: 5.5 Hours/night
WIRCam: 5.0 Hours/night
ESPaDOnS: 7.5 hours/night
SITELLE: 6.5 hours/night
A Large Program proposal must request at least 100 nights of observing time on CFHT and may request up to the maximum total of 429 nights from Canada and France (plus potential contributions by other partners). Proposals led by UH-based PIs that request 50% of their total time from the UH Agency can request a minimum of 50 nights. Within the total time requested, the observing plan must be able to obtain all the requested data in no more than six semesters, but must also be robust enough to allow a reduced data acquisition rate and a simultaneous extension beyond six semesters. The proposals should specifically discuss their robustness to such changes, for example by presenting several data acquisition timelines.
For scheduling purposes, Large Programs are considered a separate Agency at CFHT. The amount of time allocated each semester is split into A (higher) and B (lower) priority time along the ratio 40%(A) and 60%(B), and LP observations will be carried out with the same A/B observing priority policy as is applied to all other Agencies. This arrangement spreads the risk associated with weather and telescope problems equally between regular and Large Programs. Additionally, the proposed LPs should consider spreading their target RAs throughout the year and requesting observing conditions that are not overly constraining. Historically, the average completion fraction for Large Programs at CFHT is above 80%, but some programs - particularly those with stringent requirements - have had lower completion fractions. LP time allocations are not carried forward from one semester to the next.
The Large Program evaluation committee will consider the scientific merit of the proposals, the feasibility of the observations at CFHT, the robustness of the proposed program to changes in data acquisition rate and a resulting extension beyond six semesters, the data and project management plans, and the capability of the team to handle the data reduction and scientific analysis. Other factors which will be taken into account in the selection process and that need to be addressed in the proposal include the risks associated with incomplete data collection (potentially linked to overloading an instrument or requesting too large a fraction of some observing conditions), the willingness of the LP team to provide immediate data access to the CFHT community, the potential use for the data beyond the main scientific goals of the LP, the potential legacy value of the data acquired, and the inter-Agency nature of the LP team. All necessary calibration data should be requested as part of the original LP allocation.
It is important that proposing teams seek the advice of CFHT on the evaluation of risk.
- Participating community access:
- World Access: