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Spectroscopy: Grisms and Slits

Spectroscopy is done with the Large Field Objective (pixel scale ~ 0.29 arc / second), one of three slits and one of three grisms.
------------------- LONG SLITS --------------------
Slits (arcsec) 2 x 290  1 x 290 0.6 x 290
Table 1. SOFI slits.

-------------------- GRISMS --------------------
Grism \ Parameters Order Dispersion Resolution (0.6" slit) Wavelength Range
GB Grism Blue 1 6.96 1000 0.95-1.64
GR Grism Red 1 10.22 1000 1.53-2.52
HR Grism 3 4.63 2200 2.00-2.30
HR Grism 4 3.44 1500 1.49-1.81
HR Grism 5 2.71 1400 1.20-1.28
HR Grism 6 2.32 1400 1.17-1.24
HR Grism 7 1.87 1400 0.89-0.93
HR Grism 8 1.58 1400 0.86-0.95
Table 2. SOFI Spectroscopy modes.



-------------------- LINE IDENTIFICATIONS --------------------
Xenon Lamp with the Blue Grism (Postscript)
Xenon Lamp with the Red Grism (Postscript)
Neon and Xenon Lamps with the HR Grism in 3rd order (Ks) (Postscript)
Neon and Xenon Lamps with the HR Grism in 4th order (H) (Postscript)
Neon and Xenon Lamps with the HR Grism in 5th and 6th order (J) (Postscript)
Neon and Xenon Lamps with the HR Grism in 7th and 8th order (Z) (Postscript)
Xenon-Argon lines from 0.8 to 2.5 microns (from the ISAAC Manual)
OH Sky lines from 1.0 to 2.2 microns (from the ISAAC Manual)
New/updated Neon and Xenon arc line list. (Feb 2006)

-------------------- Reccomended DIT/NITs for Arcs and Flats --------------------
Arcs: DIT=5 sec, NDIT=10 (for both LR and MR)
Flats: DIT=2 sec, NDIT=30 (for both LR and MR)

-------------------- Distortion maps for spectroscopy --------------------
Calibration data for distortion corrections, for all spectrosocpic modes.

Send comments to ls-sofi <ls-sofi[@]eso.org>
Last update: May 13, 2007 - Valentin D. Ivanov
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