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This page describes the suite of calibration frames routinely taken for GSAOI. Applicants are encouraged to review the information in the instrument and GeMS pages in order to understand the level of precision that can be achieved with the standard set of calibrations.

Applicants should not include time for baseline calibrations in their Phase I proposals. If additional calibrations are deemed necessary, for example to achieve a precision beyond that provided by the baseline set, then these must be included explicitly as part of the Phase I proposal and Phase II science program. Any time used between the hours of nautical sunset and sunrise to obtain baseline calibrations will not be explicitly charged to the program but will be charged to the partner country whose NTAC recommended time (i.e. it is part of the time accounting used to balance partner usage). The time will be charged in proportion to the number of programs that receive the calibration data. Any time required for additional calibrations requested by the PI will be charged to that particular program.

Baseline calibrations will be obtained for all observations, and shared between programs. GSAOI calibrations are associated to a particular science data through the Gemini Observatory Archive (GOA). Instructions on how to retrieve the science data and associated baseline calibrations required for a program are given in the GOA Help web page. Calibrations requested outside the baseline set are included with the program data.


  • Baseline Calibrations
  • Photometric Standards and zero points
  • Download data from the Gemini Observatory Archive (GOA)
  • Pre-defined queries for Flats (Dome and Twilight) and Photometric standards for each GeMS/GSAOI run

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    Information On Gemini Website Mirrors