Observing at WMKO

Instruments Available for Semester 2016B

For detailed information about the instruments, please check the Instruments Home Page
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)
        OSIRIS-NGS (see OSIRIS note below)
        OSIRIS-LGS (see OSIRIS note below)

Keck 2 Instruments are:

        ESIi (ESI with the Integral Field Unit)
        NIRSPEC (without AO see note below)
        NIRSPAO-NGS (NIRSPEC with Natural Guide Star AO)
        NIRSPAO-LGS (NIRSPEC with Laser Guide Star AO; see Keck II LGS note below)
        NIRC2-NGS (see note below for use of L-band vortex coronagraph)
        NIRC2-LGS (see Keck II LGS note below)

Subaru Time Exchange Instruments are:

FOCAS, HDS, MOIRCS (shared risk), IRCS (with NGS/LGSAO with 188 elements), COMICS, and Hyper Suprime-Cam (limited). 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 2016B:

Visitor Instruments: WMKO will not support any visitor instruments during semester 2016B.

Keck II Laser: LGSAO on Keck II is available throughout the full semester of 2016B with no restrictions. The commissioning of the new Toptica fiber laser on Keck II is going well and we anticipate the project to complete, with the laser fully integrated, tested, and ready for science.


Keck I Laser: A new infrared tip/tilt (IR T/T) sensor will be available for "shared-risk" operation in 2016B. The details of use and performance can be found in the following pdf: Trick Performance Information. Usage of this T/T sensor is currently restricted to science observations short of K-band since the K-band light is needed for the IR T/T sensor (a K-band science mode is also planned). A visible wavelength guide star within 60" of the science target is still required for all LGSAO operations. The IR and visible star (they can be the same or different) coordinates should be included in the starlist. 

NIRC2 L-Band Vortex Coronagraph: The coronagraph will be available for science in shared risk mode in 2016B. Dimitri Mawet at Caltech is the primary point of contact and users are encouraged to contact him prior to proposing. For more information please see the Vortex User Manual and the QATICS User Manual .

OSIRIS will be unavailable for science from January 1, 2017 through May 1, 2017 for the upgrade to the imager detector.

FOCAS, HDS, MOIRCS (shared risk), IRCS (with NGS/LGSAO with 188 elements), COMICS, and Hyper Suprime-Cam (limited) at Subaru: Through an exchange with the Subaru Observatory, several nights may be available to observers who would like to use any of these instruments. Please check the Subaru web site for detailed descriptions of these instruments and the Subaru Call for Proposals for instrument restrictions, particularly for MOIRCS. Subaru time may be traded for time on both Keck telescopes, the exact number of nights depending both on the Keck and the Subaru demand. Neither Keck nor Subaru will support Target of Opportunity (ToO) observations during the exchanged nights. All observations will be executed in the "classical" observing mode. Due to primary mirror recoating, Subaru is unavailable for use from early August to early October. During semester 2016B, Hyper Suprime-Cam (HSC) will be available during the following dark times: late Jul-early August, late Oct- early Nov, late Nov-early Dec, late Dec- early Jan, and late Jan-early Feb.  Suprime Cam and FMOS are unavailable in 2016B, with FMOS scheduled for decommissioning.

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 may be either NGS programs or non-AO (seeing limited) NIRSPEC on Keck II or NGS programs or HIRES on Keck I.

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.

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 5 February 2016.