Design of the calibration unit for the WEAVE multi-object spectrograph at the WHT

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

doi:10.1117/12.2233007

9 August 2016 Design of the calibration unit for the WEAVE multi-object spectrograph at the WHT

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

Author Affiliations +

Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI; 99088R (2016) https://doi.org/10.1117/12.2233007
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

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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, and E. Carrasco "Design of the calibration unit for the WEAVE multi-object spectrograph at the WHT", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99088R (9 August 2016); https://doi.org/10.1117/12.2233007

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KEYWORDS

Lamps

Calibration

Mercury

Spectrographs

Neon

Picture Archiving and Communication System

Reflectors

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