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Gemini Planet Imager (GPI): Cleared for Shipment to Gemini South!

In a milestone statement distributed moments ago by the GPI Pre-delivery Acceptance Review Committee, Chair Stephen Goodsell announced that GPI is now clear for shipment from the University of California Santa Cruz to Gemini South in Chile.The Committee’s final report is slated for release on July 26th, but a statement sumarizing the results of the review is available now - GPI Review Committee: Final Day Statement  41 KB


Gemini e-Newscast #29 -- March 2, 2011

Quasar feedback measured

GNIRS Temporarily Unavailable

Due to ongoing problems with its cold heads, GNIRS is about to be removed from the telescope and warmed up for closer inspection. We should know by Friday October 10th whether this intervention has been successful. The instrument will not be available for observations during this period, and NIRI will be installed on the GNIRS telescope port instead (see the 2014B telescope schedule:

Gemini North ODB offline Sep 24

The Gemini North observing database will be offline on September 24 from 9:45 am - 12:00 pm HST while we perform network maintenance. During this time the following services will be unavailable:

  • Phase I Tool guide star probability queries
  • CADC program key validation (Gemini North programs only)
  • Observing Tool synchronizations, file transfers, and non-sidereal target queries (Gemini North programs only)

Please check this site for further announcements.

Detector Array

Detector characteristics are given in this section. Note that the GMOS-South detectors have been upgraded in 14B. Note also that the telescope optics are now silver-coated, reducing the system throughput in the blue.

GMOS-S Array


This information refers to the EEV detectors at GMOS-S. These were removed in may 2014 and are no longer available. The Hamamatsu detectors were installed in june 2014. 


The GMOS South detector array consists of three 2048x4608 EEV chips arranged in a row. The table below gives a summary of the current detector/controller characteristics.

Gemini Instrument Feasibility Studies: FUNDING AVAILABLE

Gemini Observatory is pleased to announce the release of the Gemini Instrument Feasibility Studies Request for Proposals (RfP).

Please visit this page for full details.

Smallest Known Galaxy with a Supermassive Black Hole

Figure 1. Stellar Kinematic Maps of M60-UCD1 showing clear rotation and a dispersion peak. Panels a and b show the measured radial velocities (bulk motions towards & away from us) and velocity dispersions (random motions) of the stars in M60-UCD1 with typical errors of 6 km/s. Black contours show isophotes in the K band stellar continuum.

Bias Images (N and S)

Example bias images are available for the following instrument/detector combinations:


Mask-making Software

The current version of the GMOS Mask Making software (GMMPS) is v0.4.1, released in 2014-08-27 for Linux and Mac OS X. This is an interim version to provide support for the new Hamamatsu detectors in GMOS-S. It is not yet fully backwards compatible (see below).

Caution !! VERY IMPORTANT NOTE for GMOS-S users, concerning the Hamamatsu detector upgrade -- PLEASE READ !!