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Observation Preparation

This section describes how to prepare and check Phoenix observations.

Guiding Options

Phoenix does not contain an on-instrument wavefront sensor and therefore the fast tip-tilt guiding, which is mandatory for all observations with Gemini, requires guide stars to be acquired using the facility peripheral wavefront sensor (usually PWFS-2).

Sensitivity and Overheads

It is recommended that the user consult the Sensitivity Table or the Sensitivity Plots to estimate limiting magnitudes and total integration times.


High resolution spectroscopy can be obtained with Phoenix in the 1-5µm region, within the bandpasses of the blocking filters mounted in the instrument. A small range of narrow slit widths (providing different resolving powers) is available. The properties of the slits and blocking filters are described in this section, as well as information about exposure times and observing hints.

Sensitivity Estimates

UPDATES TO BE DONE: 1. Links broken


Observing Overheads

Current estimates are that the overheads associated with each new science target (for target acquisition, telescope, WFS and instrument re-configuration etc) depend upon the guide configuration chosen for the observation.

Setup times for various observation types are: