Subaru Open Use Policy
1. Three Types of Open Use Program
Three kinds of Open Use programs are available, depending on the requested telescope time:
Subaru Telescope calls for proposals from astronomical researchers twice a year, which we call Semester A and Semester B (see the time table below). The submission deadline of Service/Filler Program is about one month later than that that of Normal/Intensive Program. Please pay attention to the specific deadline date for each semester which is announced in Call for Proposals.
The following facility instruments are available for Subaru Open Use (as of S19A).
Those who intend to use the visiting instruments for Subaru Open Use must include the relevant instrument PI as a Co-investigator. The correspondence address for the PI is as follows:
Applicants can also submit proposals using carry-in instruments of their own. However, those who intend to use such specific instruments are required to make contact with the Director of the Subaru Observatory in advance as early as possible. Any "carry-in instrument" proposals without going through such a procedure (notification or negotiation beforehand) can not be accepted.
The latest information on the telescope performance can be found at the Telescope webpage. If you have any question related to the telescope, please contact Dr. Kazuhito Namikawa.
4. Criteria for Evaluation of Proposals
Subaru Time Allocation Committee decides which proposals to accept, while consulting reviewers' assessments; e.g., in terms of the following criteria.
Members of the Time Allocation Committee
5. Allocation policy
About 65% of total nights will be assigned to Open Use Proposals.
Although Subaru Telescope is entirely funded by the Japanese government, we also invite proposals from the international community. Maximum 5% of total nights will be allocated to such international proposals (see [note 1]). In any case, non-Japanese researchers are encouraged to submit their proposals in collaboration with Japanese researchers.
Instrument exchanges are not permitted within a night. While observing time will in principle be awarded in units of 1 (whole) night for Normal Programs, you may request an allocation of half nights (i.e., in units of 0.5 night) if it is really sufficient for your intended purpose. It should be realized, however, that you might have some disadvantage in this case, because of the difficulties involved in scheduling half-night programs (i.e., we have to find another complementary program that fills in the other half-night).
6. ToO policy
The Director may override scheduled observations to execute ToO (Target of Opportunity) observations, in case of particularly important celestial events. The telescope time of regular observers lost by its break-in of ToO observations will be compensated by the observatory.
An identical proposal of the same science/targets using the same instrument/telescope should not be submitted twice at the same time through different TAC processes. For example, if a proposal using Keck/Gemini was once submitted to Subaru time-exchange program, it should not be applied to the ordinary proposal selection on Keck/Gemini side at the same semester. (And vice versa.)
8. Data Rights and Archiving
Observers of Subaru Telescope will have exclusive access to their data for a period of 18 months from the time of observation, after which the data will be made open to the public in the Subaru archival database.
After you have achieved intended scientific goals with the data obtained with Subaru Telescope, we encourage you to publish your results as scientific papers. Please refer to our publication webpage for details.
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