Observing at WMKO

Instruments Available for Semester 2018B

For detailed information about the instruments, please check the Instruments Home Page
For information about which instruments can be used on the same night, please check Instrument Sharing
a Resolving Power vs. Wavelength comparison of Keck instruments, please check this Instrument Comparison graph.

Keck 1 Instruments are:

        HIRESb (blue x-disperser)
        HIRESr (red x-disperser)
        LRIS-ADC (red and blue, with ADC)
        LRISp-ADC (polarimeter, with ADC)

Keck 2 Instruments are:

        ESIi (ESI with the Integral Field Unit)
        NIRSPEC (without AO) limited availability, see below
        NIRSPAO-NGS (NIRSPEC with Natural Guide Star AO, see restrictions below) limited availability, see below
        NIRSPAO-LGS (NIRSPEC with Laser Guide Star AO; see restrictions below) limited availability, see below
        NIRC2-LGS (note NIRC2-NGS/LGS is available with use of the vector vortex coronagraph)


Subaru Time Exchange Instruments are:

COMICS, FOCAS, HDS, Hyper Suprime-Cam, IRCS (with NGS/LGSAO with 188 elements), MOIRCS, CHARIS, SCExAO, and IRD (shared risk). See below for limitations.

Telescope Limits

Please note that Keck I and Keck II have different eastern and western telescope limits. This affects the times objects will be available for observing. Objects can be acquired earlier on Keck II and followed later on Keck I.

Special Notes for Semester 2018B:

There will be a one week shutdown on Keck 1 in August to repair the Az journal, tentatively scheduled from August 20-26.

NIRSPEC: Nirspec will be unavailable for use from August 1 until early December as the instrument undergoes an upgrade

Time Domain Astronomy: Observers will continue to have the ability to propose both cadence and ToO programs using the cover sheet. Updated policies for 2018 related to Target of Opportunity or Time Domain Astronomy proposals can be found at Too Policies and Cadence Policies. These policies are not applicable to Subaru Exchange time. For Semester 2018B, four Keck partners (UC, Caltech, UH, and NASA) have agreed that TAC-approved ToO (TDA) projects will be able to interrupt observers at any of the four Institutions, to increase the utility of the ToO process.

COMICS, FOCAS, HDS, Hyper Suprime-Cam, IRCS (with NGS/LGSAO with 188 elements), MOIRCS, CHARIS, SCExAO and IRD (shared risk) will be available. Please check the Subaru web site http://www.subarutelescope.org/Observing/index.html for detailed descriptions of these instruments, and the web site http://www.naoj.org/Observing/Proposals/Submit/call.html for instrument restrictions, particularly for PI instruments SCExAO and CHARIS, and for filter availability for HSC. In addition, please check the website carefully because Subaru plans to have several downtimes (from a few nights up to a week) over October-December in 2018. The SUBARU-KECK exchange will continue to have flexibility with regard to the number of nights available for exchange. The number of nights exchanged will be determined based on the demand from each community. Neither Keck nor Subaru will support Target of Opportunity (ToO) observations during the exchanged nights, and Keck's internal TDA policies do not apply. Observations will be executed in "classical" observing mode. Subaru may support half night allocations, but whole night allocations are preferred. For HSC programs, Subaru may support "queue" observing mode, if specified in the proposal. Although this mode is in shared-risk for Keck users in 18B (Subaru will try their best but cannot guarantee the completion or provide any compensation), queue-mode may allow more flexible allocation such as e.g. very short 0.25 night request. Please check the HSC queue mode website https://www.naoj.org/Observing/queue/index.html for more details.

LGS-AO: A detailed set of guidelines for LGS-AO nights and information on the capabilities of the systems may be found on the LGS-AO page. Backup programs for LGS proposals are essential. Backup programs for LGS on Keck II may be either NGS programs or non-AO (seeing limited) NIRSPEC. On Keck I, either NGS-OSIRIS and non-AO HIRES may serve as a backup.

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. NIRSPAO will be unavailable from August 1 through early December.

KOA (Keck Observatory Archive): Data from all instruments will be archived in the Keck Observatory Archive (KOA). The default proprietary period for all data is 18 months. If observers desire a different proprietary period they may request this through the Keck coversheet. Please see the KOA homepage for information on the archive. Please also see the KOA proprietary period policy.

For detailed information about the instruments, please check the Instruments Home Page

  (further observing information)

This page last updated 3 Feb 2018 ccj.