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Near-IR calibrations are discussed in detail on the general near-IR web pages, as they are generally similar for all Gemini near-IR imagers and spectrographs. A baseline calibration set (not charged to the PI) is taken for each observation, generally the minimum calibrations necessary to ensure the utility of the observations in the archive.


In addition to the general acknowledgment to the Gemini Observatory, the following specific acknowledgment should be included in any paper containing Phoenix data:

This paper is based on observations obtained with the Phoenix infrared
spectrograph, developed and operated by the National Optical Astronomy

Data Format and Reduction

Phoenix data are formatted into IRAF compatible images (fits files). Gemini does not provide a specific IRAF package for Phoenix, but the data reduction process is straightforward and documented in the NOAO Phoenix web pages.

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.