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 S17A/2017A.

1. Details

Directors of Subaru Telescope and Keck Observatory agreed to continue a time exchange program for the semester which corresponds to 'S17A' of Subaru and '2017A' of Keck, both begin on 2017 February 1 and end on 2017 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. Keck observations are always executed remotely, either from the Keck office at Waimea or an approved remote site on the mainland US. 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 S17A are as follows.

Keck I telescope:
OSIRIS (unavailable from January 1, 2017 through May 1, 2017)
Adaptive Optics with Laser Guide Stars (LGS-AO)
Adaptive Optics with Natural Guide Stars (NGS-AO)

Keck II telescope:
NIRC2 (L-band coronagraph is offered in shared risk mode
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 and NIRC2, but NIRSPEC is limited only to observations without AO.

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.

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 Å). Compared to other spectrographs, its sensitivity is particularly high in the near-UV (3300 - 4000 Å), and in the red end of the visible range ( > 10000 Å). 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. OSIRIS will be unavailable for science from January 1, 2017 through May 1, 2017 for an upgrade to the imager detector.
HIRES HIRES is an optical high dispersion spectrograph covering from 3000Å to 10000Å.
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 Å. It can cover 3900-11000 Å 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.
NIRC2 (with LGS/NGS-AO) High-spatial-resolution infrared imaging, slit spectroscopy, and coronagraphy using LGS/NGS-AO are possible.
NIRSPEC (without AO) 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 S17A, 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 S17A Call for Proposals (namely, noon, 2016 September 7, 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

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