Subaru/Keck Time Exchange Program

This is the instruction for Subaru users who intend to apply for Keck telescope time through the Subaru/Keck Time Exchange Program in S19A/2019A.
Only Japan or Taiwan researchers (i.e., those belonging to institutes in Japan or Taiwan, or those of Japanese nationality) are eligible for this Subaru -> Keck application.

1. Details

Directors of Subaru Telescope and Keck Observatory agreed to continue a time exchange program for the semester which corresponds to 'S19A' of Subaru and '2019A' of Keck, both begin on 2019 February 1 and end on 2019 July 31. This time exchange program is coordinated so that astronomers in each community can mutually access unique instruments of each telescope.

Observations with both Keck and Subaru telescopes will be executed in a 'classical' mode, except for HSC queue programs proposed by Keck users. Keck observations are always executed remotely, either from the Keck office at Waimea or approved remote sites in the U.S. mainland. Please refer to this Keck webpage .

Scientific merits of the proposals are reviewed and assessed in each TAC independently (namely, proposals from the Subaru community using Keck are reviewed by Subaru TAC). Those who have direct access to Keck time must refrain from submitting proposals to this program.

2. Available Instruments and Observing Time

Keck instruments available to the Subaru community in S19A are as follows.
There is a one week Keck 1 shutdown planned in June for repairs to be made to the azimuth journal, tentatively scheduled the bright time in mid-June.
Several AO upgrade projects will be occurring through the semester that will require short periods of AO downtime. These will generally be scheduled during timeframes of low AO demand during the semester.

Keck I telescope:
LRIS
MOSFIRE
OSIRIS
HIRES
+
Adaptive Optics with Laser Guide Stars (LGS-AO)
Adaptive Optics with Natural Guide Stars (NGS-AO)

Keck II telescope:
DEIMOS
ESI
KCWI
NIRES
NIRC2 (unavailable for 3-5 weeks for a vector vortex coronagraph upgrade, maybe from late March)
NIRSPEC (unavailable in February & March)
+
Adaptive Optics with Laser Guide Stars (LGS-AO)
Adaptive Optics with Natural Guide Stars (NGS-AO)

LGS-AO or NGS-AO can be combined with OSIRIS, NIRC2, and NIRSPEC. Note that NIRSPEC+AO (NIRSPAO) is scheduled in campaign mode given limited demand for this configuration. If there are insufficient requests for its use, NIRSPAO may not be scheduled in a given semester.

LGS-AO backup program : Those who request LGS-AO time must prepare backup programs, because cloudy conditions may hinder propagation of laser. For OSIRIS + LGS-AO proposers, OSIRIS with NGS-AO is available as a backup instrument. For NIRC2 + LGS-AO proposers, NIRC2 with NGS-AO, and NIRSPEC without AO, are available. For NIRSPEC+LGS-AO proposers, NIRSPEC with NGS-AO or NIRSPEC without AO are available.

The unique capabilities of these Keck instruments, compared to the existing Subaru instruments, are briefly summarized below for the Subaru community.

A brief summary of Keck instruments available this time
LRIS LRIS is a multi-object spectrograph, with high sensitivity over an extensive wavelength range (3300-11000 ┼). Compared to other spectrographs, its sensitivity is particularly high in the near-UV (3300 - 4000 ┼), and in the red end of the visible range ( > 10000 ┼). LRIS is also equipped with an Atmospheric Dispersion Compensator which virtually eliminates atmospheric dispersion for zenith distances less than 55 degrees, and keeps it well below 1" up to 60 degrees.
MOSFIRE MOSFIRE is a near-infrared multi-object slit spectrograph with a field of view of 6'.1 x 6'.1. Up to 46 slits may be deployed.
OSIRIS (with LGS/NGS-AO) OSIRIS is an infrared integral field spectrograph. It can be combined with LGS/NGS-AO. The maximum field of view is larger than Gemini NIFS. OSIRIS requires AO.
HIRES HIRES is an optical high dispersion spectrograph covering from 3000┼ to 10000┼.
DEIMOS DEIMOS is an optical multi-object slit spectrograph. For medium-resolution spectroscopy (R = 1000-2000), the field of view (5x16 arcmin2) and the number of simultaneously observable objects (up to 150 objects per slitmask) are ∼ 3 - 5 times larger than Subaru FOCAS.
ESI ESI is an optical spectrograph, with moderately high spectral resolution (R ~ 10000) and high throughput at >7000 ┼. It can cover 3900-11000 ┼ in a single exposure. ESI also has a five-slice IFU available. Each slice is 1.13 arcsec wide, 4 arcsec long, for a 4.0 x 5.7 arcsec field of view.
KCWI KCWI is a very efficient, optical integral field spectrograph with moderate to high spectral resolution (R=1000-20000), with a configurable FoV (20" x 8.3"/16.5"/33").
NIRES NIRES is a prism cross dispersed near-infrared spectrograph which provides simultaneous continuous wavelength coverage from 0.94-2.45 μm with the mean resolution of R=2700. NIRES is fitted with Flexure Control System (FCS) to minimize the effects of flexure.
NIRC2 (with LGS/NGS-AO) High-spatial-resolution infrared imaging, slit spectroscopy, and coronagraphy using LGS/NGS-AO are possible.
NIRSPEC NIRSPEC is capable of medium-resolution (R=1000-2000) and high-resolution (R=25000) infrared spectroscopy at 1-5 μm.


Note that the above summary is not comprehensive. Please refer to the Keck instruments webpages for more details of the instruments.

In S19A, up to several Keck I nights and up to several Keck II nights are available to the Subaru community. The number of exchange nights will be determined based on the demand of each community. The minimum amount of nights for each program is 1 night, because we cannot accept a number of short programs. Proposals requesting Target of Opportunity (ToO) observations are not accepted.

3. Proposal Preparation for Programs using Keck Telescopes

Table 1. Guide for Proposers Applying for Keck Time
Phase-I Subaru Submission Step 1. Proposers should submit their proposals via the webform by the deadline in Subaru S19A Call for Proposals (namely, noon, 2018 September 13, JST).


3-1. Step 1. Phase-I Submission to Subaru ProMS

Proposers intending to apply Keck observations via this Subaru Call for Proposals should access the ProMS 2.0 page to fill the webform. Proposals from the Subaru community to use Keck are treated as ones of Subaru Open Use Programs and are reviewed in the same way as other Subaru proposals. When a proposal has been successfully accepted, the proposer will then be asked to fill out the Keck Proposal Coversheet .

How to complete the Application Form:

Please follow the instructions detailed in 'How to Submit'.

"1-12"(Observing Run):
For DEIMOS and LRIS proposers, if Subaru/FOCAS and/or Gemini/GMOS are acceptable as backup instruments, please specify either of them at "2nd choice instruments".
"1-15"(Observing Method and Technical Details):
Describe by referring to Keck Instrument page.

4. Phase-I Contact

Please contact cfp_consult_at_optik-ml.mtk.nao.ac.jp.



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