The Update for S16A Applicants


Shared-risk Operation of MOIRCS

    Due to the ongoing MOIRCS Upgrade Project (see below), MOIRCS will be operated under the shared-risk policy during S16A Semester.

    For the observing time estimate, please use the current performance (unless the improved observing effeciency is crucial).

For MOS Applicants

    When you apply the MOS observation, you must explicitly specify the required number of MOS masks (both for the Full and the Minimum Number of Nights) in the Section 16 (Instrument Requirement) of the application form. And also, please describe why you need the requested number in Section 14 (Technical Justification).

    The number of MOS mask will be fixed once it is assigned by TAC's critical reviewing. The request for backup MOS mask is basically not permitted, unless it is critical to the goal of the science. If you need backup mask, please justify the reason to Section 14.

    Please note that the maximum number of MOS mask available for one contiguous observing period is 15.

Current Status of "nuMOIRCS" MOIRCS Upgrade Project

Posted 2015-08-05

As has been announced, we are currently performing significant engineering work for nuMOIRCS project. The goal of the summer 2015 closure is the detector replacement and the renewal of the control software.

The detectors are to be changed to Hawaii2 RG. All electronics related to the detector readout will also be replaced (to SIDECAR ASIC + SAM System). The benefit is the significant reduction of the readout noise as well as the overhead for detector readout. Laboratory tests indicate that the readout noise is about half of the previous system, but final performance in the summit environment remains to be measured.

The old MOIRCS control system (T-LECS) will also be replaced to the new in-house control system in orde to enhance the ability of the system maintenance and the troubleshoot.

We are planning to start the first on-sky engineering tests in late November. The achieved scientific performance will be announced here subsequently in this website.

Future Plan

We are also planning to introduce the IFU spectroscopy function to MOIRCS, as well as the upgrade of the current MOS system. The date of the downtime is still TBD, though currently starting from early 2017, when MOIRCS might "hibernate" more than a year for possible SWIMS operation, is expected.

We will update the information via this website.


    !!! Caution !!!
    Many of the numbers in the current webpate is still for the previous system before the detector upgrade. Sorry for any inconvenience.

MOIRCS (Multi-Object InfraRed Camera and Spectrograph) provides wide-field imaging and long-slit / multi-object (MOS) spectroscopic capabilities in the 0.9 ~ 2.5 µm spectral range under the natural seeing condition. The 4'×7' field of view is covered by two Hawaii2 RG 2048×2048 arrays with the spatial resolution of 0.117 arcsec/pixel.

For the imaging mode, the standard MKO YJHKs filters as well as some narrow-band filters are available. See the Imaging Mode Page for more details.

The MOS performance of MOIRCS spectroscopy mode is the most notable feature of the instrument. Using the cooled aluminium slit masks, MOIRCS can acquire about 40 object spectra simultaneously across 0.9~2.5 micron wavelength range. Currently low-resolution (R~500), medium-resolution (R~1300), and high-resolution (R~3000) modes are available. See the Spectroscopy Page for more details. All MOS observers/applicants should carefully read the MOS observation pages.

Instrument and Detector

Imaging mode

Spectroscopy mode

Instrument Citation

Please cite the following papers when you refer MOIRCS in your publication.
"Multi-Object Infrared Camera and Spectrograph (MOIRCS) for the Subaru Telescope I. Imaging"
Suzuki, R. et al. Publications of the Astronomical Society of Japan, 2008, Vol.60, No.6, pp.1347--1362.
"MOIRCS: Multi-Object Infrared Camera and Spectrograph for SUBARU"
Ichikawa, T. et al. 2006, in Proc. of SPIE, Vol. 6269, 38

Note that any data on the pages are subject to change.

Dr. Ichi Tanaka (MOIRCS Support Astronomer: email )

Updated 2015-08-05

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