A low dispersion survey spectrograph for the William Herschel Telescope

Details A low dispersion survey spectrograph for the William Herschel Telescope A low dispersion survey spectrograph for the William Herschel Telescope

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1235..691a&link_type=abstract

IN: Instrumentation in astronomy VII; Proceedings of the Meeting, Tucson, AZ, Feb. 13-17, 1990 (A91-29601 11-35). Bellingham, WA

Astronomy and Astrophysics

Astronomy

2

Design Analysis, Spectrographs, Telescopes, Computer Programs, Control, Data Reduction, Fabrication

Scientific paper

This paper describes the Low Dispersion Survey Sectrograph (LDSS-2) currently under construction for the 4.2-m William Herschel Telescope. The instrument is a versatile highly efficient multiobject spectrograph with an 11.5-arcmin field of view. Around 100 objects can be observed simultaneously using multiaperture masks made at the telescope in real-time at dispersions selectable between 10 and 47 nm/mm. By removing the dispersing element, the instrument can act as a focal reducer with a final focal ratio of f/2. This allows the field to be imaged first in order to derive accurate instrumental coordinates for the manufacture of the aperture mask.

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