Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS)

Lisa A. Crause; Ray M. Sharples; David G. Bramall; Jürgen Schmoll; Paul Clark; Eddy J. Younger; Luke M.G. Tyas; Sean G. Ryan; Janus D. Brink; Ockert J. Strydom; David A.H. Buckley; Martin Wilkinson; Steven M. Crawford; Éric Depagne

doi:10.1117/12.2055635

Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS)

Lisa A. Crause, Ray M. Sharples, David G. Bramall, Jürgen Schmoll, Paul Clark, Eddy J. Younger, Luke M.G. Tyas, Sean G. Ryan, Janus D. Brink, Ockert J. Strydom, David A.H. Buckley, Martin Wilkinson, Steven M. Crawford, Éric Depagne

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

Abstract

The Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS) is a fibre-fed R4 échelle spectrograph employing a white pupil design with red and blue channels for wavelength coverage from 370-890nm. The instrument has four modes, each with object and sky fibres: Low (R∼15000), Medium (R∼40000) and High Resolution (R∼65000), as well as a High Stability mode for enhanced radial velocity precision at R∼65000. The High Stability mode contains a fibre double-scrambler and offers optional simultaneous Th-Ar arc injection, or the inclusion of an iodine cell in the beam. The LR mode has unsliced 500μm fibres and makes provision for nod-and-shuffle for improved background subtraction. The MR mode also uses 500μm fibres, while the HR and HS fibres are 350μm. The latter three modes employ modified Bowen-Walraven image-slicers to subdivide each fibre into three slices. All but the High Stability bench is sealed within a vacuum tank, which itself is enclosed in an interlocking Styrostone enclosure, to insulate the spectrograph against temperature and atmospheric pressure variations. The Fibre Instrument Feed (FIF) couples the four pairs of fibres to the telescope focal plane and allows the selection of the appropriate fibre pair for a given mode, and adjustment of the fibre separation to optimally position the sky fibre. The HRS employs a photomultiplier tube for an exposure meter and has a dedicated auto-guider attached to the FIF. We report here on the commissioning results and overall instrument performance since achieving first light on 28 September 2013.

Original language	English
Title of host publication	Ground-Based and Airborne Instrumentation for Astronomy V
Editors	Suzanne K. Ramsay, Ian S. McLean, Hideki Takami
Publisher	SPIE
ISBN (Electronic)	9780819496157
DOIs	https://doi.org/10.1117/12.2055635
Publication status	Published - 2014
Externally published	Yes
Event	Ground-Based and Airborne Instrumentation for Astronomy V - Montreal, Canada Duration: 22 Jun 2014 → 26 Jun 2014

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9147
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-Based and Airborne Instrumentation for Astronomy V
Country/Territory	Canada
City	Montreal
Period	22/06/14 → 26/06/14

Keywords

Fibre Instrument Feed
fibre-fed
FIF
High Resolution Spectrograph
HRS
SALT
Southern African Large Telescope
échelle

Access to Document

10.1117/12.2055635

Cite this

Crause, L. A., Sharples, R. M., Bramall, D. G., Schmoll, J., Clark, P., Younger, E. J., Tyas, L. M. G., Ryan, S. G., Brink, J. D., Strydom, O. J., Buckley, D. A. H., Wilkinson, M., Crawford, S. M., & Depagne, É. (2014). Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS). In S. K. Ramsay, I. S. McLean, & H. Takami (Eds.), Ground-Based and Airborne Instrumentation for Astronomy V Article 91476T (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9147). SPIE. https://doi.org/10.1117/12.2055635

@inproceedings{38e431d2cb0449c58dcca93947773028,

title = "Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS)",

abstract = "The Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS) is a fibre-fed R4 {\'e}chelle spectrograph employing a white pupil design with red and blue channels for wavelength coverage from 370-890nm. The instrument has four modes, each with object and sky fibres: Low (R∼15000), Medium (R∼40000) and High Resolution (R∼65000), as well as a High Stability mode for enhanced radial velocity precision at R∼65000. The High Stability mode contains a fibre double-scrambler and offers optional simultaneous Th-Ar arc injection, or the inclusion of an iodine cell in the beam. The LR mode has unsliced 500μm fibres and makes provision for nod-and-shuffle for improved background subtraction. The MR mode also uses 500μm fibres, while the HR and HS fibres are 350μm. The latter three modes employ modified Bowen-Walraven image-slicers to subdivide each fibre into three slices. All but the High Stability bench is sealed within a vacuum tank, which itself is enclosed in an interlocking Styrostone enclosure, to insulate the spectrograph against temperature and atmospheric pressure variations. The Fibre Instrument Feed (FIF) couples the four pairs of fibres to the telescope focal plane and allows the selection of the appropriate fibre pair for a given mode, and adjustment of the fibre separation to optimally position the sky fibre. The HRS employs a photomultiplier tube for an exposure meter and has a dedicated auto-guider attached to the FIF. We report here on the commissioning results and overall instrument performance since achieving first light on 28 September 2013.",

keywords = "Fibre Instrument Feed, fibre-fed, FIF, High Resolution Spectrograph, HRS, SALT, Southern African Large Telescope, {\'e}chelle",

author = "Crause, {Lisa A.} and Sharples, {Ray M.} and Bramall, {David G.} and J{\"u}rgen Schmoll and Paul Clark and Younger, {Eddy J.} and Tyas, {Luke M.G.} and Ryan, {Sean G.} and Brink, {Janus D.} and Strydom, {Ockert J.} and Buckley, {David A.H.} and Martin Wilkinson and Crawford, {Steven M.} and {\'E}ric Depagne",

note = "Publisher Copyright: {\textcopyright} 2014 SPIE.; Ground-Based and Airborne Instrumentation for Astronomy V ; Conference date: 22-06-2014 Through 26-06-2014",

year = "2014",

doi = "10.1117/12.2055635",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Ramsay, {Suzanne K.} and McLean, {Ian S.} and Hideki Takami",

booktitle = "Ground-Based and Airborne Instrumentation for Astronomy V",

}

Crause, LA, Sharples, RM, Bramall, DG, Schmoll, J, Clark, P, Younger, EJ, Tyas, LMG, Ryan, SG, Brink, JD, Strydom, OJ, Buckley, DAH, Wilkinson, M, Crawford, SM & Depagne, É 2014, Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS). in SK Ramsay, IS McLean & H Takami (eds), Ground-Based and Airborne Instrumentation for Astronomy V., 91476T, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9147, SPIE, Ground-Based and Airborne Instrumentation for Astronomy V, Montreal, Canada, 22/06/14. https://doi.org/10.1117/12.2055635

Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS). / Crause, Lisa A.; Sharples, Ray M.; Bramall, David G. et al.
Ground-Based and Airborne Instrumentation for Astronomy V. ed. / Suzanne K. Ramsay; Ian S. McLean; Hideki Takami. SPIE, 2014. 91476T (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9147).

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

TY - GEN

T1 - Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS)

AU - Crause, Lisa A.

AU - Sharples, Ray M.

AU - Bramall, David G.

AU - Schmoll, Jürgen

AU - Clark, Paul

AU - Younger, Eddy J.

AU - Tyas, Luke M.G.

AU - Ryan, Sean G.

AU - Brink, Janus D.

AU - Strydom, Ockert J.

AU - Buckley, David A.H.

AU - Wilkinson, Martin

AU - Crawford, Steven M.

AU - Depagne, Éric

PY - 2014

Y1 - 2014

N2 - The Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS) is a fibre-fed R4 échelle spectrograph employing a white pupil design with red and blue channels for wavelength coverage from 370-890nm. The instrument has four modes, each with object and sky fibres: Low (R∼15000), Medium (R∼40000) and High Resolution (R∼65000), as well as a High Stability mode for enhanced radial velocity precision at R∼65000. The High Stability mode contains a fibre double-scrambler and offers optional simultaneous Th-Ar arc injection, or the inclusion of an iodine cell in the beam. The LR mode has unsliced 500μm fibres and makes provision for nod-and-shuffle for improved background subtraction. The MR mode also uses 500μm fibres, while the HR and HS fibres are 350μm. The latter three modes employ modified Bowen-Walraven image-slicers to subdivide each fibre into three slices. All but the High Stability bench is sealed within a vacuum tank, which itself is enclosed in an interlocking Styrostone enclosure, to insulate the spectrograph against temperature and atmospheric pressure variations. The Fibre Instrument Feed (FIF) couples the four pairs of fibres to the telescope focal plane and allows the selection of the appropriate fibre pair for a given mode, and adjustment of the fibre separation to optimally position the sky fibre. The HRS employs a photomultiplier tube for an exposure meter and has a dedicated auto-guider attached to the FIF. We report here on the commissioning results and overall instrument performance since achieving first light on 28 September 2013.

AB - The Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS) is a fibre-fed R4 échelle spectrograph employing a white pupil design with red and blue channels for wavelength coverage from 370-890nm. The instrument has four modes, each with object and sky fibres: Low (R∼15000), Medium (R∼40000) and High Resolution (R∼65000), as well as a High Stability mode for enhanced radial velocity precision at R∼65000. The High Stability mode contains a fibre double-scrambler and offers optional simultaneous Th-Ar arc injection, or the inclusion of an iodine cell in the beam. The LR mode has unsliced 500μm fibres and makes provision for nod-and-shuffle for improved background subtraction. The MR mode also uses 500μm fibres, while the HR and HS fibres are 350μm. The latter three modes employ modified Bowen-Walraven image-slicers to subdivide each fibre into three slices. All but the High Stability bench is sealed within a vacuum tank, which itself is enclosed in an interlocking Styrostone enclosure, to insulate the spectrograph against temperature and atmospheric pressure variations. The Fibre Instrument Feed (FIF) couples the four pairs of fibres to the telescope focal plane and allows the selection of the appropriate fibre pair for a given mode, and adjustment of the fibre separation to optimally position the sky fibre. The HRS employs a photomultiplier tube for an exposure meter and has a dedicated auto-guider attached to the FIF. We report here on the commissioning results and overall instrument performance since achieving first light on 28 September 2013.

KW - Fibre Instrument Feed

KW - fibre-fed

KW - FIF

KW - High Resolution Spectrograph

KW - HRS

KW - SALT

KW - Southern African Large Telescope

KW - échelle

UR - http://www.scopus.com/inward/record.url?scp=84922699179&partnerID=8YFLogxK

U2 - 10.1117/12.2055635

DO - 10.1117/12.2055635

M3 - Conference contribution

AN - SCOPUS:84922699179

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Ground-Based and Airborne Instrumentation for Astronomy V

A2 - Ramsay, Suzanne K.

A2 - McLean, Ian S.

A2 - Takami, Hideki

PB - SPIE

T2 - Ground-Based and Airborne Instrumentation for Astronomy V

Y2 - 22 June 2014 through 26 June 2014

ER -

Crause LA, Sharples RM, Bramall DG, Schmoll J, Clark P, Younger EJ et al. Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS). In Ramsay SK, McLean IS, Takami H, editors, Ground-Based and Airborne Instrumentation for Astronomy V. SPIE. 2014. 91476T. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2055635

Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS)

Abstract

Publication series

Conference

Keywords

Access to Document

Other files and links

Fingerprint

Cite this