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Proceedings Paper

Design of the calibration unit for the WEAVE multi-object spectrograph at the WHT
Author(s): Lilian Domínquez; Diego Cano; Neil O'Mahony; Carlos Martín; Sergio Picó ; Chris Benn; Scott Trager; Émilie Lhomé; Andy Ridings; Cecilia Fariña; D. C. Abrams; Marc Balcells; Mike Irwin; Jim Lewis; Gavin Dalton; J. A. Aguerri; P. Bonifacio; A. Vallenari; E. Carrasco
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Paper Abstract

WEAVE is the next-generation spectroscopic facility for the William Herschel Telescope (WHT), offering multi-object (1000 fibres) and integral-field spectroscopy at two resolutions (R ~ 5000, 20000) over a 2-deg field of view at prime focus. WEAVE will (mainly) provide optical follow up of ground-based (LOFAR) and space-based (GAIA) surveys. First light is expected in mid 2018. Here, we describe the calibration unit, which will be adapted from an existing unit for the AF2+WYFFOS spectrograph (WEAVE's precursor) at the WHT. We summarise the results from a thorough characterisation of current performance (e.g. intensity, stability and focal-plane coverage of illumination as a function of lamp type and wavelength). We then set out our plans for upgrading the unit and its control systems to meet the WEAVE science and operational requirements. We conclude from this assessment that the upgraded AF2+WYFFOS calibration unit will meet the requirements for WEAVE. The design of the WEAVE calibration unit is now complete.

Paper Details

Date Published: 9 August 2016
PDF: 14 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088R (9 August 2016); doi: 10.1117/12.2233007
Show Author Affiliations
Lilian Domínquez, Isaac Newton Group of Telescopes (Spain)
Diego Cano, Isaac Newton Group of Telescopes (Spain)
Neil O'Mahony, Isaac Newton Group of Telescopes (Spain)
Carlos Martín, Isaac Newton Group of Telescopes (Spain)
Sergio Picó , Isaac Newton Group of Telescopes (Spain)
Chris Benn, Isaac Newton Group of Telescopes (Spain)
Scott Trager, Univ. of Groningen (Netherlands)
Émilie Lhomé, Isaac Newton Group of Telescopes (Spain)
Andy Ridings, Isaac Newton Group of Telescopes (Spain)
Cecilia Fariña, Isaac Newton Group of Telescopes (Spain)
D. C. Abrams, Isaac Newton Group of Telescopes (Spain)
Marc Balcells, Isaac Newton Group of Telescopes (Spain)
Mike Irwin, Univ. of Cambridge (United Kingdom)
Jim Lewis, Univ. of Cambridge (United Kingdom)
Gavin Dalton, STFC Rutherford Appleton Lab. (United Kingdom)
J. A. Aguerri, Instituto de Astrofísica de Canarias (Spain)
P. Bonifacio, GEPI, Observatoire de Paris, PSL Research Univ., CNRS, Univ. Paris Diderot (France)
A. Vallenari, INAF - Osservatorio Astronomico di Padova (Italy)
E. Carrasco, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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