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2022A Call for Proposals

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Gemini Observatory invites its community to propose scientific investigations for the 2022A semester, 1 February 2022 - 31 July 2022.

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.

Participant Submission Deadline
United States September 30, 2021 at 23:59 (Mountain Standard Time)
Canada October 01, 2021 at 16:00 (Pacific Daylight Time)
Brazil October 02, 2021 at 23:59 (Brazilian Time)
Argentina October 01, 2021 at 17:00 (Argentina Time)
Korea October 01, 2021 at 23:59 (Korea Standard Time)
Chile October 01, 2021 at 23:59 (Civil Chile Time)
Univ. of Hawaii October 01, 2021 at 10:00 (Hawaii-Aleutian Standard Time)
Subaru Community September 30, 2021 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. 


Time Available in 2022A

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, 172 nights are expected to be available for science. At Gemini South, 174 nights are expected to be available for science.

Participant/Type  North hours  South hours Notes Participant/Type  North hours  South hours Notes
US 685 707 US open skies policy allows PIs from any institution to apply. Limited Term Partner 7 2
Canada 188 192 Director's Discretionary 85 77 Open to any astronomer.
Argentina 38 37 Fast Turnaround 167 146 Open to PIs from US, CA, AR, BR, KR, UH (North only). Not open to CL.
Brazil 81 79 Large and Long 183 134 Pre-allocated in A semesters. In B semesters, open to US and CA PIs.
Korea 88 86 Guaranteed Time 50 114 For the MAROON-X, IGRINS, and NGS-2 instrument teams.
Univ. of Hawaii (host) 150 Engineering 88 74
Chile (host) 162


New and Notable in 2022A

The following capabilities and announcements are notable for the 2022A semester. Please see the relevant instrument pages and subsections of the call for proposals for details.

General:

  • Starting in semester 2022A, all Gemini proposals requesting time from Canada must be anonymized. This applies to programs requesting time only from Canada, and to joint programs requesting time from multiple participants which include Canada. This applies to programs requesting Canadian time whether it is the PI or a co-I that has the Canadian affiliation. Other participants are moving to implement a dual-anonymous review process (DARP) in semester 2022B or 2023A, and so it is in the best interest of all investigators to learn how to write an anonymous science case. Guidance is available at the Canadian DARP page.

  • Gemini is planning the 2022A semester call for proposal as usual. However significant changes can happen and impact the available observing time and instruments, due to the continuing impact of the COVID-19 pandemic.

  • Classical and Priority Visitor mode is offered for semester 2022A at Gemini North, but not accepted at Gemini South. This may change as the pandemic evolves. If circumstances preclude having people on site, then awarded Classical time will revert to eavesdropping, and Priority Visitor will revert to queue. The "Bring One, Get One" Student Observer Support Program remains unavailable.

Facility Instruments:

  • Gemini North GNIRS (1-5 micron spectrometer) is expected to be unavailable during the month of March, for the installation of new integral field units.  

Visiting Instruments:

  • 'Alopeke and Zorro, the fast low-noise dual-channel and dual-plate-scale imagers with speckle and wide-field modes, will be available for science (subject to demand) as resident visiting instruments at Gemini North and Gemini South, respectively, in 2022A.
  • IGRINS, a high-resolution (R~45000), single-setting, near IR (1.45 - 2.5 microns) echelle spectrometer, will be available for science (subject to demand) as a visiting instrument at Gemini South in 2022A. New for semester 2022A: PIs must include the additional overheads for science target acquisition and detector readout in their requested time. The Gemini Phase I Tool will automatically add time for telluric star calibrations to the requested science time. See the IGRINS at Gemini page for more information.
  • MAROON-X, a high-resolution (R~80,000), optical (500 - 900nm) radial velocity (RV) spectrometer  as a visiting instrument at Gemini North in 2022A. The instrument is open to the community for high precision RV studies as well as general purpose high resolution spectroscopy. The instrument has demonstrated sub-m/s on-sky precision for RV measurements of M dwarfs, although the instrument performance is continually being assessed and improved. Please use the Maroon-X Exposure Time Calculator to evaluate the instrument performance.
  • POLISH-2, a high-precision optical polarimeter, will be available for science (subject to demand) as a visiting instrument at Gemini North in 2022A. POLISH-2 requires the instrument team to be present at the telescope and therefore runs may be cancelled if the Covid-19 pandemic prevents visitors at the Observatory.


Summary of 2022A Gemini Capabilities

Gemini North

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 2022A are:

  • GMOS North (0.36-1.03 micron imager and spectrometer): available throughout the semester. The R600 grating is available to classical programs only.

  • GNIRS (1-5 micron spectrometer): expected to be unavailable during the month of March 2022, due to the installation of new integral field units. Access to RAs of 7 to 10 hours will be significantly reduced and investigators using GNIRS are encouraged to be as flexible as possible with their targets. As before, the short red camera is NOT available. YJHK imaging is available via the acquisition keyhole.

  • NIRI (1-5 micron imager): available throughout the semester. As in past semesters, NIRI is NOT available for spectroscopy.

Visiting instruments offered in 2022A (subject to demand) are:

  • 'Alopeke: a dual-channel fast-readout visual-wavelength camera giving simultaneous diffraction-limited images in two filters over a 2.8 arcsec field of view; as well as a wide-field mode which provides simultaneous two-color imaging in standard SDSS filters over a 60" field of view. The scheduling and length of the Alopeke visiting block(s) will be subject to community demand.  Targets of Opportunity (Rapid or Standard) are accepted for Alopeke, but will only be executed during the instrument blocks.

  • GRACES: a high-resolution, R~67,500, optical (0.4-1 micron) spectrometer. Scheduled blocks to be determined with CFHT (where the instrument resides), based on demand.

  • POLISH-2: the high-precision visiting polarimeter, will be available for science, subject to demand.  The instrument is open to the community via collaborative proposals with the PI. If you are interested in obtaining data in the 2022A semester with this instrument, you must contact the PI (Sloane Wiktorowicz - sloane.j.wiktorowicz at aero.org). For more details of the instrument itself, consult the following publication: Wiktorowicz et al. 2015 ApJ 813 and references therein.  In 2016B, it was found that for stars brighter than B = 6 mag, precision of around 10 parts per million requires about 10 minutes of observing time. However, due to the large intrinsic telescope polarization of 0.4%, accuracy at  the 10 part per million level has not been demonstrated at the time of this call for proposals.

  • MAROON-X: a high-resolution (R~80,000), optical (500 - 900nm) radial velocity (RV) spectrometer,  is open to the community for high precision RV studies as well as general purpose high-resolution spectroscopy.  Please use the Maroon-X Exposure Time Calculator to evaluate the instrument performance.

Gemini South

Targets are generally limited to 5 < RA hours < 2 and -90° < dec < +28°. There are additional constraints as described in the target accessibility and instrument restrictions page.

Facility instruments offered in 2022A are:

  • GSAOI (0.9-2.4 micron adaptive optics imager) with the GeMS Adaptive Optics system: due to guide star limitations, investigators must check the availability of Guide Star constellations using the Observing Tool before submitting a proposal.  Observations in IQ85 are possible for programs that can use delivered images with full-width half-maximum of ~0.2 arcseconds as opposed to the ≤ 0.1 arcseconds delivered in IQ70 or IQ20 conditions. Observations under non-photometric conditions with 0.1 mag uniform extinction are also possible under very good IQ conditions.  The expectation is to have two or three laser runs of 7 nights each during the semester, the actual schedule will be based on the demand from the community.

Visiting instruments offered in 2022A (subject to demand) are:

  • Zorro: a dual-channel fast-readout visual-wavelength camera giving simultaneous diffraction-limited images in two filters over a 2.8 arcsec field of view; as well as a wide-field mode which provides simultaneous two-color imaging in standard SDSS filters over a 60" field of view. The scheduling and length of the Zorro visiting block(s) will be subject to community demand.  Targets of Opportunity (Rapid or Standard) are accepted for Zorro, but will only be executed during the instrument blocks.

  • IGRINS, a high-resolution (R~45000), single-setting, near IR (1.45 - 2.5 microns) echelle spectrometer, will be available throughout the semester except for two weeks before and during the 7-night GeMS/GSAOI runs. See the IGRINS at Gemini page for more information on writing IGRINS proposals.


Important Dates for 2022A

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 2022. Check the 2022A schedule for key dates and events in the proposal process.


Phase I Submission Guidelines for 2022A

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 a pdf attachment which includes the science and technical cases. See the PIT page for installation information and the integration time calculators (available in all of the instrument's pages, with the exception of some visitor instruments) for calculating exposure times.  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) should specifiy observations at the preferred site only, and note in the technical case that observations at either site are acceptable.

Starting in semester 2022A, all Gemini proposals requesting time from Canada must be anonymized. This applies to programs requesting time only from Canada, and to joint programs requesting time from multiple participants which include Canada. Guidance is available at the Canadian DARP page. Sections which of necessity include the investigators' names, such as team publications, are split off from the science case seen by the review panels. Note that, starting in 2022A, the Canadian TAC may downgrade or reject proposals which are not anonymized.

Note that, the 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 Observing Section in the PIT help pages for details.


Subaru Exchange Time 

The exchange of time between the Gemini and Subaru communities will continue in 2022A. Gemini and Subaru expect to be able to exchange a minimum of 5 nights. A summary of the Subaru capabilities in 2022A is given below, PIs should also consult the Subaru Call for Proposals.

Relevant information:

  • Do NOT double-dip! PIs applying for time on the Subaru telescope must only apply via ONE of the following routes: Japanese researchers via the Subaru call; other researchers via the open use time offered in the Subaru call; Gemini community PIs via the Gemini time-exchange program; or Keck community PIs via the Keck time-exchange program. Duplicating your proposal across more than one of these committees leads to confusion and aggravated TAC members.
  • Proposals for time on Subaru via the Gemini time-exchange program are submitted via the normal Gemini Phase I process.
  • Subaru telescope downtime: Semester 2022A will be shortened so that the mirror coating and other engineering work can be done in the July to September 2022 period. The exact dates are not determined as of this Call.
  • Subaru instrument downtime:
    • Hyper Suprime-Cam (HSC) will not be available between February and early April, while the top-end exchanger is worked on.
    • Only Natural Guide Star Adaptive Optics is available in 2022A because of laser upgrade work.
    • The windscreen of the Subaru telescope is out of operation in 2022A, and thus tracking of target may not be possible in high winds. It is recommended that PIs have targets across a range of RAs so that different azimuth angles are available.

Facility instruments offered in 2022A:

  • Hyper Suprime-Cam (HSC - very wide field optical to far-red imager) is available only between late April and the end of the semester (June or July, depending on the telescope shutdown schedule). Three, approximately two-week-long, HSC runs are expected to be scheduled in that time period. The requested time should include overheads and be in multiples of one hour.  Important notice for HSC filters: all applicants must explicitly describe the filters they intend to use, in their proposal. The desired set as well as the minimum acceptable set should be clearly specified. Applicants wishing to use the NB391 or NB395 filter must obtain approval from the filter developer team. 

Visiting instruments offered in 2022A, are listed below. Proposals to use visiting instruments must include the instrument PIs as Co-investigators. 

  • CHARIS: Coronagraphic High Angular Resolution Imaging Spectrograph - provides high contrast images of exoplanets, disks, brown dwarfs with SCExAO.
  • Fast PDI (in shared-risk mode): polarization differential imaging (PDI) with a high speed (>kHz) near-IR (950 - 1860 nm) low-noise camera (C-RED One), optimized for high contrast imaging of circumstellar disks with SCExAO+AO188. 
  • IRD - Infrared Doppler (in shared-risk mode): infrared high-dispersion, high resolution (up to 70,000) fiber-fed spectrometer.  IRD SSP is started in 2019A – any IRD proposal must clarify how its scientific aim is different from SSP. The observing mode REACH (SCExAO+IRD), is available.
  • MEC (in shared-risk mode), decision on availability to be made mid-October 2021: the MKID Exoplanet Camera is a near-IR (800-1400nm) photon-counting low-resolution (R~5) integral field spectrograph optimized for high contrast imaging with SCExAO+AO188.
  • SWIMS (in shared-risk mode): Simultaneous-color Wide-field Infrared Multi-object Spectrograph - an imager and multi-object spectrograph in the NIR wavelength. SWIMS applicants cannot request MOIRCS as a backup instrument.
  • VAMPIRES : The Visible Aperture Masking Polarimetric Imager for Resolved Exoplanetary Structures (VAMPIRES) is a visible light instrument on the SCExAO system. 
  • NsIR Wave Plate Unit: a visiting device for IRCS/SCExAO polarimetry mode.


Other Proposal Opportunities in 2022A

Other proposal opportunities are available at Gemini Observatory in 2022A. 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.

  • 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. Note that HSC will not be available between February and early April 2022. Execution is not guaranteed: observations are made only when there is no other program in the HSC queue. In recent semesters, typically of order 15% of HSC time has gone to filler programs.  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. After the proprietary period the data are publicly available. 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. This web-based 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.