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EMIR (Espectrógrafo Multiobjeto
Infrarrojo) is a wide-field, near-infrared, multi-object spectrograph proposed for the Nasmyth
focus of GTC (Gran Telescopio Canarias). It
will allow observers to obtain from tens to hundreds of intermediate resolution spectra
simultaneously, in the nIR bands Z, J, H, K. A multi-slit mask unit will be used for target
acquisition. EMIR is designed to address
the science goals of the proposing team and of the Spanish community at large.
EMIR will provide a robust second-generation
instrument for GTC while providing an observing mode unique among 8m class telescopes.
EMIR was first proposed by Rafael Guzmán
(Yale University Observatory). It will be built by a consortium of
Spanish, British and French institutions, led by the Instituto Astrofísico de Canarias
(IAC).
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EMIR
Description and Specifications
| General Aspects |
| Focal Station |
Nasmyth |
| Wavelength range |
0.9 - 2.5 microns |
| Optimization |
1.0 - 2.5 microns |
| Spectral resolution |
4000 for Z, J and H bands; 3500 for K band |
| Spectral coverage |
One observing window (Z, J, H and K) per single exposure |
| Array format |
Rockwell HgCdTe 2048 x 2048 |
| Scale at detector |
0.2 arcsec per pixel |
| Limiting magnitude |
J=25.5, H = 24.5, K = 23.5 for S/N = 5; t = 4 hours |
| OH suppression |
In software |
| Cryostat |
| Spectrograph temperature |
77 K |
| Multi-object Spectroscopy Mode |
| Multi-object selection |
Multislit mask interchanger |
| FOV |
6 arcmin x 4 arcmin |
| Imaging Mode |
| FOV |
6 arcmin x 6 arcmin |
| Plate scale |
0.2 arcsec per pixel |
| Filters |
Bands Z, J, H, K and K'; narrow band filters (to be defined) |
Send suggestions or comments to
'ase' or 'jgm' at this domain: astrax.fis.ucm.es
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Last modified: November 2002
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