Instruments Proposals
Call for Proposals
Policy Webform How to Submit? Normal Program Intensive Program Service Program ToO Program Subaru/Gemini Subaru/Keck Past Information
| Subaru Open Use PolicyEligibility for each programEligibility for each program is described in each page:
Allocation PolicyAbout 65% of total available nights excluding the downtime period will be assigned to Open Use Proposals. Maximum 5% of total nights will be allocated to international proposals (see *1). Non-Japanese researchers are encouraged to submit their proposals in collaboration with Japanese researchers. Observing time will in principle be assigned in units of 1 (whole) night for Normal Programs, except for queue observations. But the Observatory may allocate half night observations according to the necessity of scheduling. Queue mode is default observing mode for HSC, meanwhile the other instruments are used in classical mode except for service programs. In principle, canceled observation time due to unexpected problem such as telescope/instrument failure or natural disaster will not be compensated. *1 International proposals are defined as those submitted by non-Japanese principal investigators (PIs) belonging to non-Japanese institutions. However, according to the MoU, researchers belonging to Princeton University or Taiwan are exceptionally allowed to use Subaru up to 10% of the total nights. Dual Anonymous Review System From S23B, Subaru SAC and TAC implement a dual anonymous (DA) system for the proposal review. Under the DA system, proposals will be reviewed according to the policies below:
Please refer to the DA guidelines for more details. Applicants are requested to follow the DA writing style described in How to Submit? page. Members of the Time Allocation Committee (2023/08-2025/07)
Data Rights and ArchivingObservers of Subaru Telescope will have exclusive access to their data for a period of 18 months (548 days) from the time of observation, after which the data will be made open to the public in the Subaru archival database. Applicants are required to check their targets in SMOKA database (Public Data Archive) before submission. If the objects have already been observed by Subaru in the past, the reason why they need to be observed again must be described. The complete texts of the abstracts of all the accepted Subaru proposals will be open to the public after the time of the data release (i.e., when the proprietary period of 18 months has expired).
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