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The properties of the Aladdin III InSb detector array for the GNIRS science channel are given in Table 1 below. The array has nicely uniform response, only a few regions of bad and dead pixels (see table below) very low dark current and low read noise in the lowest background mode. The bias voltage may be adjusted to increase the well depth for thermal IR (L and M band) observations or for very bright targets. InSb detectors have nearly 100 percent internal quantum efficiency (QE) from 0.4 to 5 microns, with a rolloff near the cutoff wavelength of 5.5 microns.
This page contains an abbreviated description of the observations and data reduction. More details can be found in the Winge et al. 2009 publication indicated before. Users are particularly referred to that paper for examples in the usage of the templates.
The GNIRS sample:
The tables contain the list of observed stars, organized by spectral type. When available, heliocentric radial velocities and magnitudes are from Simbad; spectral type, effective temperature and surface gravity are from Cayrel de Strobel et al. (1997, A&AS,124,299), except where indicated in the notes. The data are in standard fits format (1D spectrum) - use Shift+left click to download to disk. In the GNIRS table, an "N/A" in the "blue" setting column indicates the target was not observed in that range.
Spectral templates (usually late type stars) are required for the analysis of kinematical data on external galaxies (or other stellar ensembles). In the near-IR, the most commonly used features are the CO overtone bands at λ > 2.3µm.
The new version of the Gemini Observing Tool (2012B.2.1.1) is now available for download or via updating an existing installation of the OT. This update is required to communicate with the observing databases.