Low dispersion survey spectrograph for the William Herschel Telescope

Jeremy R. Allington-Smith; J. Mike Breare; Richard S. Ellis; Ian Robert Parry; G. D. Shaw; John Webster; David W. Gellatly; Susan P. Worswick

doi:10.1117/12.19132

1 July 1990 Low dispersion survey spectrograph for the William Herschel Telescope

Jeremy R. Allington-Smith, J. Mike Breare, Richard S. Ellis, Ian Robert Parry, G. D. Shaw, John Webster, David W. Gellatly, Susan P. Worswick

Author Affiliations +

Proceedings Volume 1235, Instrumentation in Astronomy VII; (1990) https://doi.org/10.1117/12.19132
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

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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Jeremy R. Allington-Smith, J. Mike Breare, Richard S. Ellis, Ian Robert Parry, G. D. Shaw, John Webster, David W. Gellatly, and Susan P. Worswick "Low dispersion survey spectrograph for the William Herschel Telescope", Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); https://doi.org/10.1117/12.19132

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