The Instrument

LIRIS is a near-infrared imager and spectrograph built by the Instituto de Astrofísica de Canarias [1]. It is operated as a common user instrument (see Fig. 1) on the 4.2 m William Herschel Telescope at the Observatorio del Roque de Los Muchachos (ORM-La Palma) since August 2004. The detector is a HAWAII-I array operating at 70 K. Currently, LIRIS includes imaging and spectroscopic observing modes. Spectroscopy is performed with long-slit and a number (~8) of multi-object masks. Grisms are used as dispersion elements providing a resolution of 650. In the future it will also include R~3000.

Figure 1. LIRIS attached to the Cassegrain platform at the 4.2 m William Herschel Telescope.

Was this article helpful?

0 0
Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

Get My Free Ebook


Post a comment