SixPak: a wide-field IFU for the William Herschel Telescope

Lars B. Venema; Ton Schoenmaker; Marc Verheijen; Scott Trager; René Rutten; Matthew Bershady; Søren Larsen; Reynier Peletier; Marco Spaans

doi:10.1117/12.789130

SixPak: a wide-field IFU for the William Herschel Telescope

Lars B. Venema
, Ton Schoenmaker
, Marc Verheijen
, Scott Trager
, René Rutten
, Matthew Bershady
, Søren Larsen
, Reynier Peletier
, Marco Spaans

Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

We intend to construct SixPak, a wide-field fibre-based IFU for the 4.2-meter William Herschel Telescope on La Palma. The fibre bundle will consist of 238 fibres, each 3.0 arcsec in diameter, piping light from the Nasmyth focal plane of the WHT to the existing WYFFOS bench spectrograph. A total of 217 fibres will be densely packed to span a hexagonal field of view of 64 × 55 arcsec. The remaining 21 fibres will collect light from the sky background. SixPak is optimized for 2-dimensional spectroscopy at intermediate resolutions of extended objects of low surface brightness. At Nasmyth focus, a focal reducer matches the f-ratio of the telescope (f/11) to the "optimal" f-ratio of the fibres (f/3) to reduce the losses due to focal ratio degradation in the fibres. Microlenses convert the output f-ratio of the fibres to the f-ratio of the WYFFOS collimator (f/8.2). By means of an exchangeable slit at the pupils of the microlenses, a spectral resolution of R = 10,000 can be achieved. The intention is that SixPak will be open for general use in order to allow easy access to the broadest possible astronomical community.

Original language	English
Title of host publication	Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II
Pages	9
Volume	7014L
DOIs	https://doi.org/10.1117/12.789130
Publication status	Published - 1-Jul-2008

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http://adsabs.harvard.edu/abs/2008SPIE.7014E..0LV

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title = "SixPak: a wide-field IFU for the William Herschel Telescope",

abstract = "We intend to construct SixPak, a wide-field fibre-based IFU for the 4.2-meter William Herschel Telescope on La Palma. The fibre bundle will consist of 238 fibres, each 3.0 arcsec in diameter, piping light from the Nasmyth focal plane of the WHT to the existing WYFFOS bench spectrograph. A total of 217 fibres will be densely packed to span a hexagonal field of view of 64 × 55 arcsec. The remaining 21 fibres will collect light from the sky background. SixPak is optimized for 2-dimensional spectroscopy at intermediate resolutions of extended objects of low surface brightness. At Nasmyth focus, a focal reducer matches the f-ratio of the telescope (f/11) to the {"}optimal{"} f-ratio of the fibres (f/3) to reduce the losses due to focal ratio degradation in the fibres. Microlenses convert the output f-ratio of the fibres to the f-ratio of the WYFFOS collimator (f/8.2). By means of an exchangeable slit at the pupils of the microlenses, a spectral resolution of R = 10,000 can be achieved. The intention is that SixPak will be open for general use in order to allow easy access to the broadest possible astronomical community.",

author = "Venema, \{Lars B.\} and Ton Schoenmaker and Marc Verheijen and Scott Trager and Ren{\'e} Rutten and Matthew Bershady and S{\o}ren Larsen and Reynier Peletier and Marco Spaans",

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T1 - SixPak: a wide-field IFU for the William Herschel Telescope

AU - Venema, Lars B.

AU - Schoenmaker, Ton

AU - Verheijen, Marc

AU - Trager, Scott

AU - Rutten, René

AU - Bershady, Matthew

AU - Larsen, Søren

AU - Peletier, Reynier

AU - Spaans, Marco

PY - 2008/7/1

Y1 - 2008/7/1

N2 - We intend to construct SixPak, a wide-field fibre-based IFU for the 4.2-meter William Herschel Telescope on La Palma. The fibre bundle will consist of 238 fibres, each 3.0 arcsec in diameter, piping light from the Nasmyth focal plane of the WHT to the existing WYFFOS bench spectrograph. A total of 217 fibres will be densely packed to span a hexagonal field of view of 64 × 55 arcsec. The remaining 21 fibres will collect light from the sky background. SixPak is optimized for 2-dimensional spectroscopy at intermediate resolutions of extended objects of low surface brightness. At Nasmyth focus, a focal reducer matches the f-ratio of the telescope (f/11) to the "optimal" f-ratio of the fibres (f/3) to reduce the losses due to focal ratio degradation in the fibres. Microlenses convert the output f-ratio of the fibres to the f-ratio of the WYFFOS collimator (f/8.2). By means of an exchangeable slit at the pupils of the microlenses, a spectral resolution of R = 10,000 can be achieved. The intention is that SixPak will be open for general use in order to allow easy access to the broadest possible astronomical community.

AB - We intend to construct SixPak, a wide-field fibre-based IFU for the 4.2-meter William Herschel Telescope on La Palma. The fibre bundle will consist of 238 fibres, each 3.0 arcsec in diameter, piping light from the Nasmyth focal plane of the WHT to the existing WYFFOS bench spectrograph. A total of 217 fibres will be densely packed to span a hexagonal field of view of 64 × 55 arcsec. The remaining 21 fibres will collect light from the sky background. SixPak is optimized for 2-dimensional spectroscopy at intermediate resolutions of extended objects of low surface brightness. At Nasmyth focus, a focal reducer matches the f-ratio of the telescope (f/11) to the "optimal" f-ratio of the fibres (f/3) to reduce the losses due to focal ratio degradation in the fibres. Microlenses convert the output f-ratio of the fibres to the f-ratio of the WYFFOS collimator (f/8.2). By means of an exchangeable slit at the pupils of the microlenses, a spectral resolution of R = 10,000 can be achieved. The intention is that SixPak will be open for general use in order to allow easy access to the broadest possible astronomical community.

U2 - 10.1117/12.789130

DO - 10.1117/12.789130

M3 - Conference contribution

VL - 7014L

SP - 9

BT - Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II

ER -

SixPak: a wide-field IFU for the William Herschel Telescope

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