Information for S15B applicants:

Hyper Suprime-Cam (HSC) will be offered for open use in a shared-risk mode. Remote observations conducted from the Hilo Base Facility are not available.

In S15B, there will be 4 observing runs, which will be assigned for maximum about two weeks around new moon in August, October, November, and January. In total, maximum about 55 HSC nights will be available in S15B, including openuse, SSP, Keck/Gemini time exchange, and University of Hawaii time.

NB816 filter is newly opened from S15B. If you want to use narrow-band filters of HSC (NB921, NB816, and NB515), you must obtain an approval in advance from the filter developer team. See 'Available filters and sensitivities' for detail information and contact addresses.

The following filters will be used by the HSC SSP in S15B.

Month Filter
August r,i,z,Y,NB816
October g,r,i,z,Y
November g,r,i,z,Y,NB921
January g,r,i,z,Y

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 plan 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.

The HSC development team is going to carry out 3 night Guaranteed Time Observations (GTO; allowed to each instrument team at the commisioning phase). The target list of the GTO is as below.

Target RA(hours) Dec(degrees) Filter
SXDS_SW 2 -05 Y
MRC0200 2 01 g, i, z
JL5 (Jupiter Lagrange L5 point) 7 21 r
Abell901 10 -10 i
Hectomap 16 43 i
NGC6822 19 -14 g,i

HSC proposers who request to observe the same fields as aimed in the HSC SSP are required to explain the differences between your program and the HSC SSP. Please find the SSP fields from the web page of the HSC SSP.

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. Please note that the filter exchanging system of HSC can hold up to 6 filters in one observing run.


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.




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 2015

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