Only two such targets (for all programs) can be observed during any typically week-long LGS run, and only one such target (for all programs) can be observed on any given night. We do offer limited LGS observations of Band 1 and 2 ToOs that are triggered less than 4 days before, or during, an LGS run. The observation must coincide with a scheduled laser run, and use a scheduled instrument. Standard ToO Gemini North laser guide star (LGS) observations are allowed however, targets must be defined at least 4 business days in advance of the intended observation date. The instruments currently available for tonight, and details of the GMOS North and South configurations, are kept up to date and are available for both the North and South telescopes. ToO transients requiring followup on timescales shorter than a month are not appropriate for Band 3. Rapid Response programs are only accepted if the relevant NTAC places them in Science Band 1.
Thus if a ToO program falls in the topmost science ranking band it will be executed, observing conditions permitting, whereas a program in a lower band will not be executed if there is a higher-ranked program that is also suited to the conditions. Note that the override provided by the trigger event normally acts only on its own band. Target of Opportunity programs are merged into the telescope queue, occupying one of the scientific ranking bands. Details of the ToO request process are given here. It is the responsibility of the PI to trigger to trigger the observation request for their program. Upgrades to good conditions will not be approved for RToO programs, and the SToO proposal is required if such conditions are necessary for later followup. Proposals that require later followup of an RToO must be accompanied by a separate proposal for SToO in conditions better than SB/CC/IQ=Any. After recommendation of the proposal by the NTAC and approval by the ITAC and Director, the observing conditions and configurations can only be changed via the queue change request process. Observations which are more flexible with respect to instrument configuration are also more likely to be executed (e.g., for choice of GMOS grating). The conditions must however be appropriate for the targets and desired science. Therefore, all such proposals must specify the poorest acceptable conditions under which the observations should be executed, as if these conditions are too restrictive then the observations might not be carried out. Observing ConditionsĪll Target of Opportunity observations are executed in the queue mode by Gemini staff. Standard ToO (SToO) observations can be executed at any time after the trigger and are usually done more than 24 hours after.Īll proposals for (RToO) followup are required to submit a separate proposal for (SToO) followup when the required weather conditions are better than SB/CC/IQ=Any, if such followup is planned.Rapid ToO (RToO) observations must be executed within 24 hours of the trigger.
For other unforeseen events, see Director's Discretionary Time. Phase II templates must also be provided by the regular Phase II deadlines, even if the specific targets are unknown and will be completed at a later date. identification of a target brighter than a pre-determined threshold) in the proposal abstract (additional details can be included in the technical justification). All facility instruments that are offered for queue observing are available for ToO programs, except for GMOS MOS. Proposals for the Target of Opportunity mode must be made via the normal, fast turnaround, or large and long proposal processes, must select the TOO Activation mode in PIT Time Requests tab, and must summarise the trigger event (e.g. Examples include following up newly detected supernovae or Gamma Ray burst afterglows or observing a particular class of objects from an ongoing imaging survey. The Target of Opportunity (ToO) observing mode allows observation of targets that cannot be specified in advance but which have a well defined external trigger. Gemini In The Era of Multi-Messenger Astronomy.Gemini Telescopes, Science and Technologies.Timing information in Gemini Instruments.
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