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United States Gemini Program

Applying for U.S. Observing Time on the Gemini 8-m Telescopes through NOAO

The Gemini Observatory has announced a Call for Proposals for the Gemini North and Gemini South Telescopes for observations during the 2015A observing period (1 February - 31 July 2015).

*** Investigators proposing for Gemini time must submit their proposals using the Gemini Phase I Tool (PIT). ***

Proposals are due by 11:59 pm MST on 25 September 2014. Please read the information below before starting a proposal.

The 2015A instrumentation for Gemini North includes GMOS-N (Gemini optical imager, Multi-Object Spectrograph, and IFU), GNIRS (Gemini Near InfraRed Spectrograph), NIFS (near-IR IFU spectrogaph). and NIRI (Near InfraRed Imager), In addition, proposals for GNIRS, NIRI and NIFS may also request Altair, the facility AO system, with natural or laser guide star AO. DSSI (dual-channel speckle imager) will be offered as a visitor instrument pending sufficient community demand.

For Gemini South, instrumentation includes FLAMINGOS-2 (near-IR imager/spectrograph), GMOS-S, GSAOI (near-IR AO imager) with GeMS (Multi-Conjugate AO system), and GPI (near-IR AO imager/polarimeter/IFU).

Exchange time is available with all facility instruments and four visiting instruments at Subaru.

About 96% of the time on Gemini-North and 93% of the time on Gemini-South will be available for science programs. The US share of science time available in this call is estimated as 88 nights at Gemini-North and 81 nights at Gemini-South. NOAO strongly encourages programs of all lengths from an hour to several nights, and ranging from short pilot programs to large programs that would have a major scientific impact. The NOAO TAC will be instructed to recommend a broad distribution of programs.

Details about preliminary instrument schedules, windows of accessibility for right ascension, and a summary of new capabilities are available on the Gemini Call for Proposals website.

Investigators proposing for Gemini time must submit their proposals using the Gemini Phase I Tool (PIT). Proposals are due by 11:59 pm MST on 25 September 2014.

Applying for Gemini Time

Applications for time from the U.S. share of Gemini should be submitted through NOAO, which is responsible for scientific and technical assessment. NOAO will provide assistance to investigators preparing proposals for Gemini time.

Investigators who are applying for time on Gemini telescopes must use the Gemini Phase I Tool (PIT) to prepare their observing proposals. PIT is available from the Gemini Observatory at Gemini proposals prepared using the PIT will be formatted for the NOAO Telescope Allocation Committee. Please see the guidelines listed on the PIT Submissions help page of the NOAO proposal instructions.

The NOAO TAC will review and rank Gemini proposals for the U.S. share of Gemini time. The ranked proposals from the several partner countries will be merged together for review by the Gemini International Time Allocation Committee, which will resolve any conflicts.

Notification of the award of time will be sent to the investigators by NOAO following final approval of the draft schedule by the Director of the Gemini Observatory. NOAO will notify investigators whether or not Gemini observing time has been granted by email in June, as soon as the schedule is available.


Instruments which are being offered in the 2015A semester are listed below. More detailed information is available about each instrument from the Gemini Observatory via the links below.

User Support

NOAO support for U.S. observing time on the Gemini 8-m telescopes is organized within the NOAO System Science Center. NSSC astronomers in Tucson and La Serena are serving as Gemini Instrument Scientists, with the responsibility to assist investigators proposing for and receiving time on Gemini.

If you have questions about Gemini instruments or about how to use those instruments, please contact NOAO's Gemini Instrument Scientists for help. You may also send email to us at, or direct queries through the Gemini HelpDesk.

If you would like feedback about your proposal before you submit it, after you have written your proposal, you can contact one of the NOAO Gemini Instrument Scientists for an evaluation of the observing details. This is intended to be a check on technical aspects, not an analysis of the observing strategy or the scientific justification. The NSSC staff will only be able to respond to requests made well in advance of the proposal submission deadline.

Proposal comments and/or suggestions, may be directed to

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NOAO is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under cooperative agreement with the National Science Foundation. The NSSC represents U.S. scientific, technical, and instrumentation interests in the international community of the Gemini project. The NSSC is a division of the National Optical Astronomy Observatory (NOAO).
Last updated: 29 August 2014.

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