Call for Proposals

Semester S22A: February 1, 2022 -- July 31, 2022

Subaru Telescope, National Astronomical Observatory of Japan

Subaru Telescope invites observing proposals for Semester S22A. Since each instrument has its own specific restrictions/conditions, applicants are required to consult the relevant instrument page when preparing their proposals. Please also refer to Proposals, How to Submit via webform, Open Use Policy and Telescope webpage.

Open Use Schedule for S22A

Deadline of Normal/Intensive Program Submission September 7 (Tue), 2021 12:00 (Noon) in Japan Standard Time (i.e., September 7, 3:00 am in UT)
Deadline of Service/Filler Program Submission October 5 (Tue), 2021 12:00 (Noon) in Japan Standard Time (i.e., October 5, 3:00 am in UT)
Time Allocation Committee late October
Notification of selection results early December


Webform the ProMS 2.0 page Instructions How to Submit via webform?

Other instructions

Instructions Open Use Policy, and each instrument page

Important Notice for S22A

Telescope Downtime The Primary Mirror recoating and some maintenance work are planned from July to September, 2022. The detailed schedule hasn't been fixed yet.
HSC Unavailable from Feb. to early April Due to maintenance work of the Top Unit Exchanger, HSC will be unavailable from February through early April, 2022.
Only NGS Mode Proposals for AO188 Our laser system is currently under the upgrading process. Proposals that can be accomplished only with NGS mode are acceptable for AO188 in S22A. Please check the AO188 webpage for the latest information.
Status of Visiting Instruments/devices (PI Instrument/devices) Following instruments/module are offered for openuse in S22A:
- CHARIS with SCExAO+AO188 (including spectro-polarimetric mode)
- Fast PDI (in a shared-risk mode)
- IRD (in a shared-risk mode)
- MEC (in a shared-risk mode) [Note: The opening of MEC in S22A will be decided in the middle of October 2021.]
- REACH (combination of SCExAO and IRD for single-mode fiber spectroscopy)
- SWIMS (in a shared-risk mode)
- NsIR Wave Plate Unit (a visiting device for IRCS/SCExAO polarimetry mode)
Proposals to use visiting instruments/devices must include the relevant PIs as Co-investigators. Visiting instruments may be used in intensive programs if necessary conditions are fulfilled. Please check the Intensive webpage.
SWIMS Operation in S22A SWIMS is opened from S21A to S22B as a substitute for MOIRCS, and MOIRCS is in a hibernate state. SWIMS applicants can NOT request MOIRCS as a backup instrument.
Simultaneous use of REACH and CHARIS REACH can be used simultaneously with CHARIS with any dispersion modes, but the wavelength coverage of CHARIS will be from 1850 nm to the longest wavelengths shown in the CHARIS web site.
Instrument Switching between IRD, REACH, CHARIS, VAMPIRES, Fast PDI, and MEC Instrument switching between IRD, REACH, CHARIS, VAMPIRES, Fast PDI, and MEC in one or half observation night for one observing proposal is possible. The required time for switching is,
- REACH <=> VAMPIRES: 0 (REACH can be used with VAMPIRES simultaneously)
- IRD <=> REACH: ~20 minutes (if the laser frequency comb is required for both IRD and REACH, otherwise 5 minutes)
- Other combination: <5 minutes
Note that IRD <=> REACH switching with laser frequency comb for both IRD and REACH is allowed up to twice per one night per one observing proposal.
Observation w/o the Windscreen The windscreen of the Subaru telescope is continuously out of operation in S22A, and thus tracking accuracy of the telescope may be degraded by high winds. Since observations may be interrupted by high winds, it is recommended that you prepare backup targets with different azimuth angles.

Reminder About Basic Rules

Description of Acceptable Observing Date Range Even though your preferred observing dates are rather limited, you should make your acceptable date range as wide as possible. Half night allocation could be made if necessary. Your proposal would be automatically rejected, in case that we cannot find any observing slot for your program in your acceptable range (even if your proposal is above the borderline of acceptance).
Moon-affected Unacceptable Dates If the Moon is close to the target, the observation could be severely affected by the Moon light and such condition should be avoided. Applicants are responsible to avoid such condition to occur by specifying the inconvenient/unacceptable dates in Hawaii Standard Time. Those inconvenient or unacceptable dates should be explicitly indicated in Entry 13 (Scheduling Requirements).
2nd Choice Instruments If your science goal could (fully or partly) be achieved by other instruments (of Subaru/Keck/Gemini) instead of your 1st choice instrument, we recommend that you describe such alternative instruments, which may be usable/acceptable to achieve your science goal, as 2nd choice instrument(s). If you choose a PI-Type instrument as a 2nd choice instrument, you need to get approval from the PI of PI-Type instrument.
Duplicated Submission Unallowable An identical proposal of the same science and targets using the same instrument and telescope should not be submitted at the same time through different TAC processes. For example, if a proposal using Keck or Gemini was once submitted to Subaru time-exchange program, it should not be applied to the ordinary proposal selection on Keck or Gemini side at the same semester (and vice versa).

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updated on August 10, 2021