The near-infrared spectrograph LIRIS was first commissioned on the WHT on the nights of 15-19 Feb 2003. During all that time the instrument functioned with no major failures. At the time of commissioning LIRIS included imaging and spectroscopic observing modes. Spectroscopy could be done at low resolution (about 700 using the narrowest slit of 0.65") using two grisms: One simultaneously covers the bands Z and J (9230 - 15,425 Angstrom) with a dispersion of 6.1 Angstrom/pix; and the other covers the bands H and K (14,600 - 24,946 Angstrom) with a dispersion of 10 Angstrom/pix.
The Newsletter of the Isaac Newton Group of Telescopes
- Pub Date:
- December 2003
- IR spectroscopy;