Information for S19B 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'.

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 5 observing runs of HSC in S19B allocated to dark or dark-gray nights.

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

The HSC SSP (Subaru Strategic Program) will use five broad-band filters ( g, r2, i2, z, Y ) in each observing run. The following filters are tentatively planned to be used by the HSC SSP.

Runs Filters
  late Sep - early Oct    g, r2, i2, z, Y, TBD  
  late Oct - early Nov    g, r2, i2, z, Y, TBD  
  late Nov - early Dec    g, r2, i2, z, Y, TBD  
  late Dec - early Jan    g, r2, i2, z, Y, TBD  
  late Jan    g, r2, i2, z, Y, TBD  

                                                               Updated on May 9, 2019 

The filter exchanger unit (FEU) of the HSC can hold up to 6 filters. It is possible to change the filter set of one (optical-side) filter stacker storing three filters in daytime while HSC observing run is ongoing. At this moment, this operation will be limited to once in an observing run at a maximum.

Although this operation will reduce the strong limit on the schedule of the narrow-band (NB) filters, the number of available NB filters in a night is still limited to one because the five broad-band filters ( g, r2, i2, z, Y ) are scheduled to be installed in all the observing runs of S19B. If you are going to use NB filters for your observation, it is recommended to plan your observation considering the predetermined filter schedule described above.

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). Note that a proposal requesting the NB387 filter must be submitted as a classical mode program.

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 focus monitoring.

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), Dr. Fumiaki Nakata (nakata_at_naoj.org) and/or Tsuyoshi Terai (terai_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 23 November 2018

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