Gemini Observatory invites its community to propose scientific investigations for the 2023A semester, 1 February 2023 - 31 July 2023.
The table below shows submission deadlines for all Gemini Participants, and the Subaru community under the Gemini/Subaru time exchange. Multi-participant joint proposals should be submitted by the deadline of the participant country to which the Principal Investigator is affiliated. For more on the Gemini proposal submission and time allocation process, please consult the Phase I page.
|United States||Friday September 30, 2022 at 23:59 (Mountain Standard Time)|
|Canada||Friday September 30, 2022 at 16:00 (Pacific Daylight Time)|
|Brazil||Monday October 3, 2022 at 23:59 (Brazilian Time)|
|Argentina||Friday September 30, 2022 at 17:00 (Argentina Time)|
|Korea||Monday October 3, 2022 at 23:59 (Korea Standard Time)|
|Chile||Friday September 30, 2022 at 23:59 (Civil Chile Time)|
|Univ. of Hawaii||Monday October 3, 2022 at 10:00 (Hawaii-Aleutian Standard Time)|
|Subaru Community||Friday September 30, 2022 at 23:59 (Hawaii-Aleutian Standard Time)|
The Call is open to all participants and host institutions: Argentina, Brazil, Canada, Korea, the United States, Chile and the University of Hawaii. US time is open to all astronomers worldwide including those at non-US institutions, although in that case the proposal must explain why U.S. national facilities are needed. In 23A time is also available to the French community as compensatory time for the use of GRACES via ESPaDOnS; the deadline for French PIs is Saturday October 1 at 23:59 (Hawaii-Aleutian Standard Time).
Time Available in 2023A
A summary of the time distribution at each telescope is shown in the Table below. More information is available at the time distribution page. At Gemini North, 171 nights are expected to be available for science. At Gemini South, 152 nights are expected to be available for science.
|Participant/Type||North hours||South hours||Notes||Participant/Type||North hours||South hours||Notes|
|US||689||556||US open skies policy allows PIs from any country to apply.||Limited Term Partner||2||2||Currently: Ben-Gurion University|
|Canada||199||161||Includes GRACES compensatory time.||Director's Discretionary||76||61||Open to any astronomer.|
|Argentina||26||21||Fast Turnaround||152||113||Open to PIs from US, CA, AR, BR, KR, UH (North only). Not open to CL.|
|Brazil||80||66||Large and Long||185||154||Pre-allocated for 23A.|
|Korea||90||72||France||9||9||GRACES compensatory time.|
|Univ. of Hawaii (host)||167||Includes GRACES compensatory time.||Guaranteed Time||38||173||For the MAROON-X, IGRINS, FLAMINGOS-2, and GHOST instrument teams|
|Chile (host)||132||Engineering||94||284||Maintenance, Gemini Program Platform testing, vibration tests at Gemini North, primary mirror recoat at Gemini South.|
New and Notable in 2023A
The following capabilities and announcements are notable for the 2023A semester. Please see the relevant instrument pages and subsections of the call for proposals for details.
Summary of 2023A Gemini Capabilities
Targets are generally limited to 4 < RA hours < 1 and -37 < DEC degrees < +90. There are additional constraints as described in the target accessibility and instrument restrictions page.
Facility instruments offered in 2023A are:
Visiting instruments offered in 2023A are:
Targets are generally limited to 5 < RA hours < 1 and -90° < dec < +28°. It is planned to execute the delayed primary mirror coating at Gemini South during the last three weeks of April, 2023. This date is a placeholder, and may change based on the progress of the coating preparations. If an April shutdown occurs, the time available at RAs 9 - 11 will be reduced by about 20%. There are additional constraints as described in the target accessibility and instrument restrictions page.
Facility instruments offered in 2023A are:
Visiting instruments offered in 2023A are:
Important Dates for 2023A
The deadline for Phase I submission varies with participant (see the submission deadline Table at the top of this CfP). For successful proposals, both queue and classical, the Phase II submission deadline is 18th January 2023. Check the 2023A schedule for key dates and events in the proposal process.
Phase I Submission Guidelines for 2023A
Proposals for time on Gemini, and for time on Subaru via the Gemini-Subaru time exchange program, must use the Gemini Phase I Tool (PIT). Latex and Word templates are available to create pdf attachments which include the science and technical cases, and investigator information. The template has been revised to enable the anonymous review process, and to make proposals requirements uniform across the partners. Two attachments are required for the proposal so that team information can be separated from the science case.
All Gemini proposals requesting time from the US, CA, BR, or AR must be anonymized. Proposals which do not meet the guidelines will be penalised. This applies to proposals requesting time only from these partners, as well as joint proposals requesting time from multiple participants which include any of these partners. This requirement applies whether it is the PI or a co-I that has the relevant partner affiliation.
Investigators from the French community, requesting Gemini time via the CFHT GRACES compensatory time, must use the Gemini Phase I Tool (PIT). On the "Time Requests" tab of the PIT, select "Proposal Class: Queue Observing'', and "Request Type: Exchange Request (CFH PIs)".
Additional options in the Time Requests module in the PIT were added in 2022B:
- the option to specify that the proposal is for the AEON multi-telescope-facility system.
- the option to identify proposals which have synergies with James Webb Space Telescope science. The goal for providing this proposal category is to encourage development of science programs that benefit from a combination of Gemini and JWST observations. More information is available here.
Time for baseline partner calibrations is automatically added to the total time requested for each target in the PIT. Investigators should continue to include the time associated to overheads (acquisition time, readout time, etc) in the total time estimated for each target in the PIT. The ITC output now gives overhead estimates. Alopeke and Zorro PIs should include program time for PSF standards if they need them. See the IGRINS at Gemini page for information on how to determine exposure times for that instrument. PIs with targets that can be observed from either Gemini North or South (e.g. equatorial targets to be observed with one of the GMOS instruments) can request time with both instruments, in that case the time with each instrument should be halved, and the Observatory will update the observation times when targets are scheduled.
Targets of opportunity proposals must include all instrument configurations which the team may want to use, at Phase 1. This enables automatic creation of templates, and avoids errors at Phase 2.
Subaru Exchange Time
The exchange of time between the Gemini and Subaru communities will continue in 2023A; around 5 nights are expected to be available on Subaru for the Gemini community via the exchange program. A summary of the Subaru capabilities in 2023A is given below, PIs should also consult the Subaru Call for Proposals.
In addition, the Gemini community can propose shorter programs for Subaru's Service mode. PIs must indicate on the proposal whether regular or service time is requested. Service programs must be short programs of less than 4 hours duration including calibration and overheads, using one of FOCAS, IRCS(+AO), HDS, MOIRCS (imaging). Around 1 night is expected to be available in this mode for the Gemini community. Prospective investigators must carefully review the Service Program web page. In particular, some additional, detailed technical information must be provided at the time of Phase-1 submission. Service proposals are reviewed by the National TACs together with the regular proposals.
Facility instruments offered in 2023A:
Visiting instruments offered in 2023A, are listed below. Proposals to use visiting instruments must include the instrument PIs as Co-investigators.
Other Proposal Opportunities in 2023A
Other proposal opportunities are available at Gemini Observatory in 2023A. These include:
- The Fast Turnaround (FT) Program provides monthly opportunities to submit proposals, with successful programs scheduled for observation starting one month after each proposal deadline. Up to 10% of the time at Gemini North and Gemini South is available for the FT programs. PIs must be members of the Argentina, Brazil, Canada, Korea, University of Hawaii or United States astronomy communities. Chile has withdrawn from the FT program and therefore Chilean PIs do not have access to FT time.
- Director's Discretionary Time is open to any astronomer worldwide and proposals can be submitted at any time.
- Poor Weather Proposals are solicited for programs that can use poor, but usable, conditions and are executed when nothing in the regular queue is observable. Proposals can be submitted via the normal TAC process (this call) or at any time. PIs must be based in Gemini participating countries or the host institutions.
- The Gemini community is eligible to propose HyperSuprimeCam (HSC) filler programs on Subaru. Filler programs are executed in poor observing conditions (typically seeing >1.5 arcseconds, and/or poor transparency), and up to 50 hours can be requested by a filler proposal, although the first 4 hours have priority. Execution is not guaranteed: observations are made only when there is no other program in the HSC queue. Proposals must be sent through the Subaru submission system (NOT Gemini), and are considered only by the Subaru TAC. Note that only a short text summary of the program is required, not a full detailed Science Justification.
Data Rights, Proprietary periods and Data Distribution
All data taken with the Gemini telescopes are the property of the Gemini Observatory. Principal investigators of Gemini regular programs (Queue/Classical/Poor Weather) have exclusive access to the data for their program for a period of 12 months. Data acquired as part of a Director's Discretionary (DD) program have a standard proprietary period of 6 months, however in exceptional circumstances the Observatory may remove DD proprietary periods. See the page Data Rights and Proprietary Periods for more information.
All data, including raw and available processed data, obtained with the Gemini telescope are distributed exclusively through the Gemini Observatory Archive. More information about the data distribution is given here.
Supporting information to the Call for Proposals
Relevant general information related to the applications for time on Gemini Telescopes is presented in the supporting information page. Consult there for the following:
- Time Allocation Process (National and International Time Allocation Committees)
- Submitting for time on both telescopes
- Band 1 Persistence
- Electronic PIT Submission
- Joint Proposals
- Under-utilized Instruments
- Targets of Opportunity
- GMOS Mask definitions
- Poor Weather Programs
- Exchange Time
- Target information (guide stars, non-sidereal objects, time-specific observations)
- Duplicate Observations
Prospective users should also refer to the target and instrument accessibility page, and the instrument pages for detailed and up to date information on instrumentation.
Questions and Answers
All questions concerning proposals, or any other subject, should be made using the Gemini HelpDesk. The system will send the request to your National Gemini Office staff in the first instance who will escalate it to Gemini staff if necessary.
Comments and suggestions on the format and content of this page and supporting pages are welcome, and should be sent to Sandy Leggett.