Call for Proposals
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Semester S18B: August 1, 2018 -- January 31, 2019
Subaru Telescope, National Astronomical Observatory of Japan
Subaru Telescope invites observing proposals for Semester S18B. 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 How to Submit via webform, Open Use Policy and Telescope webpage.
Open Use Schedule for S18B
|Deadline of Normal/Intensive Program Submission
||March 8 (Thu), 2018 12:00 (Noon) in Japan Standard Time
(i.e., March 8, 3:00 am in UT)
|Deadline of Service/Filler Program Submission
||April 5 (Thu), 2018 12:00 (Noon) in Japan Standard Time
(i.e., October 5, 3:00 am in UT)
|Time Allocation Committee
|Notification of selection results
Important Notice for S18B
|Telescope Maintenance and Status
||Replacement of electric boards for the Primary mirror actuator,
updates of Top-Unit-Exchanger hardware as well as Communication device,
blackout drill of one day, are being planned in S18B. All observations
are to be done without windscreen. See "Telescope-Related Topics"
for more details.
|Australian Time in S18B
||In S18B, Subaru Telescope provides Australian researchers with 5 nights using Director's Discretionary Time based on the agreement between NAOJ and
AAL. Anyone belonging to institutions in Australia is eligible to submit Australian proposals. Applicants are required to explicitly specify "[AUS Time]" in the title head of the proposal. For more details, please see this.
|AAT Time in 2018B for Japanese Researchers
||In 2018B, the Anglo-Australian Telescope (AAT) provides Japanese researchers
with 2 nights based on the agreement between NAOJ and AAL. For more details on
proposal submission (directly to AAT), please see here. The proposal deadline for 2018B is scheduled to be March 15, 2018.
|Status of PI Instrument
IRD (InfraRed Doppler), which is a near-IR high-dispersion
echelle spectrograph, will be newly available for open use in a shared-risk mode. CHARIS (with SCExAO+AO188) as well as VAMPIRES module in SCExAO are
offered for open use observations as usual.
|Operation of Hyper Suprime-Cam
||There will be at most 6 observing runs of HSC in S18B allocated to
dark or dark-gray nights in August through January.
FEU-OPT filter exchange will be newly available in a shared-rik mode.
See also "Notice for HSC Applicants"
for more detailed information regarding HSC.
|New Policy of Travel Suppot
||Due to the severely tight budget, NAOJ's support of travel expense to Hawaii is
limited to only one Japanese observer (i.e., reduced from the previous two)
for each observing run, though up to three Japanese researchers may still be
supported including remote observers from Japan/Mitaka.
|Gemini LLP and Subaru IP
|| In S18B, Subaru users can apply for the Gemini Large and Long Program while
Gemini users inversely for the Subaru Intensive Program, within the framework of
Time Exchange between Subaru and Gemini.
|Revised Science Categories
||The science categories to be selected by applicants for each
proposal have been partly reorganized and renamed. See here for more details.
|Replacement of Electric Boards for Primary Mirror Actuator
||Some of the electric boards for the primary mirror actuators should be
replaced and tested in S18B for the sake of long-term stable operation and
future replacement of the whole system. We expect downtime of about three
nights for this work.
|Top-Unit-Exchanger Hardware Update
||Top Unit Exchanger (TUE) is a semi-automatic robotic exchange mechanism
for the Subaru Telescope, by which the top units such as Hyper Suprime-Cam
and other secondary mirrors are exchanged.
Since its hardware is aged, we plan to update it in and after S18B.
During this update work in S18B, TUE can not be used for about four weeks;
and telecope downtime of one week is expected.
|Communication Device Update
||We are planning to replace communication hardware between the telescope
and local control devices in and after S18B. Serial to Parallel exchange
Units (SPU) are going to be replaced in S18B, for which three-night
downtime is expected.
|Planned Drill for Blackout
||We intend to conduct a blackout drill sometime in S18B to reduce
any risk of blackout, for which one-day downtime will be required.
|No-Windscreen Observation throughout S18B
||Due to the incident on April 10, 2017, the windscreen of the Subaru
telescope is out of operation in S18B, and thus tracking accuracy of
the telescope may be degraded at high winds. Since observations may
be interrupted at high winds, backup targets with different azimuth
angle should be prepared.
|Use of HSC
||In S18B, HSC will be offered in a shared-risk mode.
HSC proposers requesting to observe the same fields as targeted in
the HSC SSP (Subaru Strategic Program) are obliged to clarify the reason
for doing so (e.g., how the scientific aim is different from that of SSP).
Service observations are not available.
|Queue Mode Observation of HSC
In S18B, queue mode observation with HSC will be offered for the normal, intensive, and
Time-critical program is possible since the
last semester. Monitoring program is possible as a "shared-risk" mode.
Users who want to submit a monitoring program need to contact HSC Queue
Mode working group () before submission.
Please carefully read this
for the preparation of the monitoring program.
Proposers can request up to 35 hours (= 5 nights) for the normal program
and 280 hours (=40 nights) in up to 6 consecutive semesters for the
The requested time should be total on-source time without including
overhead. There is no lower limit for requested observing time.
Note that HSC queue mode is not
available for the Australian time. Please see
HSC queue mode web page for more detailed information.
|Classical Mode Observation of HSC
||Given that the queue mode is the primary mode of HSC observation,
proposers wishing to use the classical observation mode of HSC have to
describe why the classical mode is preferred to the queue mode in
Entry 13.(Scheduling Requirements). Unless any convincing reason,
proposers may be asked if it is possible to change the observation
mode from classical to queue.
|"No-Additional-Target" Policy for HSC
||In S18B, requesting additional targets is not allowed for any HSC
observations during the semester. The dead time ("Sukima" time), when
there is no planned target on the night sky, will be exploited as
effectively as possible depending on the situation (observing
priority: 1. observations of standard stars, 2. queue-mode
observations for Grade A/B, 3. observing user's back-up targets, and
4. queue-mode observations for Grade C and F).
|Set of HSC Filters
||HSC users must explicitly describe the filters they intend to use in Entry 16,
where the desired set as well as the minimum acceptable set should be clearly specified.
|Filter Exchange during HSC Observing Run
||We will start operation of FEU-OPT filter exchange from S18B in a
shared-risk mode, which is to change filters in the optical-side FEU stacker
in daytime while HSC observing run is ongoing. Please see
the instrument web page for details.
Notice About Nasmyth/Cassegrain Instruments
|Notice for HDS Applicants
||HDS often has to be combined with the Subaru
infrared secondary mirror (with which throughput at <3800Å is considerably deteriorated),
in order to accommodate as many HDS programs as possible.
So, if blue or UV regions are crucially needed for your program, it should be
explicitly described in Entry 16 (Instrument Requirements).
||IRCS observations will be conducted always in combination with AO188 optics, regardless of the use of AO correction.
Polarimetry mode of IRCS+AO188 has been partially opened for open use in a shared-risk mode. The available modes are Y-, J-, H-, K-, and L-band imaging polarimetry and zJH, HK, and L-band spectropolarimetry modes. Please see the "Polarimetry" section of IRCS page for more detailed information.
Grism and Echelle spectroscopy modes of IRCS+AO188 are available in service programs along with imaging. Targets of any spectroscopic modes for service programs must have suitable NGS, or TTGS. Please see the Service program page for more detailed information.
|Dark Nights Essentially Due to HSC
||Since almost all dark nights will be allocated to Hyper Suprime-Cam, using dark nights with other instruments would be hardly possible.
Notice About Time-Exchange Programs
|Time Exchange Programs with Gemini and Keck
||According to the inter-observatory time-exchange agreement, we accept proposals of observations with Gemini (North & South) and Keck telescopes, which will be screened by Subaru TAC within the framework of Subaru Call for Proposals. Maximum several nights (for each of Keck I and Keck II) and minimum 5 nights (Gemini) are available in S18B for this purpose. Those who have direct access to Gemini or Keck time must refrain from applying for Gemini/Keck observing time by this program.
Please refer to Subaru/Gemini Time Exchange page and Subaru/Keck Time Exchange page for more details.
|Application from Gemini/Keck Community
||Non-Japanese PIs who wish to use the Subaru Telescope and have access to Gemini or Keck telescope time must apply through the time-exchange program provided by Gemini or Keck. Regarding institutes which entered an MoU with Subaru/NAOJ, however, the agreement in the MoU will be exceptionally applied.
|Mutual Application for Gemini LLP and Subaru IP
||Regarding the time exchange between Subaru and Gemini, application for Subaru Intensive Program (by Gemini users) and for Gemini Large and Long Programs
(by Subaru users) are allowed only in semester B (i.e. once a year).
|Gemini Fast Turnaround Program
||Subaru Community can apply for Fast Turnaround Programs, in which up to 5 nights per semester are available for researchers belonging to Subaru Community. Their submission deadlines are irrelevant
for those of the ordinary Call for Proposals.
Required Clarification in Proposals
|Necessity of MOIRCS Preimaging
||MOIRCS/MOS users who need to take the pre-images with MOIRCS should explicitly request it in the "Technical Justification" part. Please check the instrument web page for more details.
|Necessity of FOCAS Preimaging
||FOCAS/MOS users are required to describe explicitly about the pre-imaging
observation with FOCAS in Entry 16 (Instrument Requirements) when it is necessary
for their MOS mask design. Please check the instrument web page for details.
|Number of MOIRCS/MOS Masks
||MOIRCS/MOS users must explicitly describe the
required number of masks in Entry 16,
where the desired number as well as the minimum acceptable number should be clearly specified.
|Moon-affected Unacceptable Dates
||When one particular source or several sources whose coordinates are concentrated to a particular sky region are planned to be observed on bright or grey nights, observations may be severely affected by the Moon in some particular nights. In such cases, those inconvenient or unacceptable dates should be explicitly indicated in Entry 13 (Scheduling Requirements).
|Service Program Similar to Normal Program
||Service Program applicants are required to clarify whether they have submitted similar Normal/Intensive Program proposals for this semester.
|Target Check in Subaru Archive Data
||Applicants are required to check their targets in SMOKA database (Public Data Archive) before submission. If the objects have already been observed by Subaru in the past, the reason why they need to be observed again must be described.
Reminder About Basic Rules
||From S16B, the size of Intensive Program has been expanded up to 40 nights over maximum 6 consecutive semesters (with maximum 20 nights in a semester). From S17B, we accept Intensive Program using HSC not only in the classical mode but also in the queue mode.
|Proposals for Unspecified Targets
||Proposals in which targets are not specified at the time of proposal submission may be
submitted to Normal Program, but not to Service Program.
|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 you to describe such alternative instruments,
which may be usable/acceptable to attain
your science goal, as 2nd choice instrument(s).
|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.
Your proposal would be automatically rejected, in case that
we cannot find an observing slot for your program in your
acceptable range (even if your proposal is above the borderline
|"Technical Justification" Entry in Service Proposal form
||From S17A, a new entry (Technical Justification) has been arranged in the application form of the service program, in which technical details (such as integration time and so on) should be explained.
|Abstract of Accepted Proposals Going to Be Opened
||It has been decided that the complete text of the abstract
of all the accepted Subaru proposals from S15B semester
will be open to the public at the same time of the data release
(i.e., when the proprietary period of 18 months has expired).
||In principle, cancelled observation time due to unexpected telescope/instrumentation failure will not be compensated.
|Using PI Instruments
||Any proposal using PI instruments must include the relevant instrument PI as a Co-investigator. In principle, the use of each PI instrument at the infrared Nasmyth focus is limited to only one observing run in a semester.
|Duplicated Submission Unallowable
||An identical proposal of the same science and targets using the same instrument and telescope should not be submitted twice 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.)
|One Proposal for One Project
||Even if you intend to carry out observations by using different Subaru instruments
(or even by using different telescopes, such as Subaru+Keck or Subaru+Gemini) for the same scientific project(s),
you must describe them only in "one" proposal, because separate submission of two or more proposals belonging to
the same project brings about considerable confusion.
You can specify several different instruments in Entry 12 (Observing Run) and describe your detailed observing plan of how to use them in Entry 16 (Instrument Requirements) or Entry 15 (Observing Method and Technical Details).
Especially, if you want to use two telescopes (Subaru+Gemini or Subaru+Keck) for the same project(s), please summarize your plan in one proposal and select the relevant option in the webform.
|Time Allocation Basically One-night Unit
||Telescope time allocation (except for queue observations) is basically made in unit of one night, though half night allocation may be exceptionally possible, if a suitable
program can be found for the other half night.
||Remote observations from Mitaka Headquarter (remote-M) are allowed for all instruments under the approval of relevant support astronomer.
Meanwhile, remote observations conducted from Hilo Base Facility
(remote-H) may be allowed for IRCS (NGS mode only), HDS, HSC, and MOIRCS (for experienced observers). Those who wish to perform the observations remotely should check the box in Entry 13 (Scheduling Requirements), though such a request may not necessarily be granted, depending on the instrument status and/or scheduling limitations.
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