Information for S18A applicants:

Hyper Suprime-Cam (HSC) will be offered for open use in a shared-risk mode.

HSC queue mode will be opened for the normal, intensive, and filler programs. Please see detail information at the 'HSC Queue Mode Webpage'. Note that the HSC queue mode will NOT be opened for Keck time exchange and the Australian time.

Additional target request for filling dead time ('Sukima time') in HSC classical mode programs are NOT allowed. We will execute HSC queue mode programs in the dead time in HSC classical mode programs.

There will be at most 5 observing runs of HSC in S18A allocated to dark or dark-gray nights in February through June. We will NOT mount HSC in July for maintenance works.

If you want to use narrow-band filters, you may need to obtain an approval in advance from the filter developer team. See 'Available filters and sensitivities' for detail information and contact addresses.

The HSC SSP (Subaru Strategic Program) will use NB101 in February, and NB816 in April. IB945 will be installed in March for an intensive program (S16B-0001I). If you want to use the IB945 filter, please cantact Dr. Akio Inoue (akinoue_at_las.osaka-sandai.ac.jp) before submitting your proposal. In summary, the following filters will be used by the HSC SSP, and open use programs in S18A.

Month Filter
February NB101
March IB945
April NB816
July Not available

The filter exchanger unit (FEU) of the HSC can hold up to 6 filters in one observing run. If you plan to use narrow-band filters for your observation, please consider the predetermined filters described above. Please note that there is a high probability that all broad-band filters (grizY) will be demanded by open use programs assigned at each month, in which case only one narrow-band filter can be used in each observing run.

HSC proposers requesting to observe the same fields as targeted in the HSC SSP are obliged to clarify the reason for doing so (e.g., how the scientific aim is different from that of SSP). Please find the SSP fields from the web page of the HSC SSP.

HSC proposers wishing to use the classical mode observation have to describe why the classical mode is necessary in Entry 13 ('Scheduling Requirements' in the application form).

HSC proposers must explicitly describe the filters they intend to use in Entry 16 ('Instrument Requirements' in the application form), where the desired set as well as the minimum acceptable set should be clearly specified.


The Hyper Suprime-Cam (HSC) is a gigantic mosaic CCD camera, which is attached at the prime focus of Subaru Telescope. The HSC uses 104 main science CCDs, which covers 1.5 deg FoV in diameter with a pixel scale of 0.17", as well as 4 CCDs for auto guider, and 8 CCDs for auto focus.

It takes about 30min for changing filters. When we exchange filters, it is necessary for us to move telescope to the zenith position, and rotate the instrument rotator to the appropriate angle (∼0deg). we also close the cover of the primary mirror for safety operation.

When you cosider to produce new HSC filters, please read the filter policy carefully, and contact Subaru Telescope (new development group: newdev_at_naoj.org) well before applying for funds. Also, please refer the procedure to determine filters for each HSC run.

We ask for your understanding in advance that observed data, whose proprietary periods (1.5yrs) do not end, may be used by Subaru staff without PI's permission for engineering purposes.



Data Analysis


Questions regarding HSC should be directed to Dr. Satoshi Miyazaki (satoshi_at_naoj.org) and/or Fumiaki Nakata (nakata_at_naoj.org).

Please note that all numbers on these pages are subject to change as the performance of HSC is better determined.

last update 9 February 2017

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