Development of a laser frequency comb and precision radial velocity pipeline for SALT's HRS

Lisa Ann Crause; Richard Alexander McCracken; Derryck Telford Reid; Daniel L. Holdsworth; Roufurd P. M. Julie; Lizette Labuschagne; Rudi Kuhn

doi:10.1117/12.2630007

Development of a laser frequency comb and precision radial velocity pipeline for SALT's HRS

Lisa Ann Crause, Richard Alexander McCracken, Derryck Telford Reid, Daniel L. Holdsworth, Roufurd P. M. Julie, Lizette Labuschagne, Rudi Kuhn

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

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Abstract

The Southern African Large Telescope (SALT) is developing precision radial velocity capability for its high-resolution spectrograph (HRS). The instrument's high-stability (HS) mode includes a fibre double scrambler and makes provision for simultaneous thorium-argon (ThAr) injection into the calibration fibre. Given the limitations associated with ThAr lamps, as well as the cost and complexity of turn-key commercial laser frequency combs (LFCs), we are in the process of designing and building a bespoke LFC for the Red channel of the HRS (555-890 nm). At a later stage we plan to extend the wavelength range of the LFC to include parts of the blue channel (370-555 nm) as well. A data reduction pipeline capable of delivering precision radial velocity results for the HS mode is also currently under development. We aim to have the LFC and PRV pipeline available for science operations in early 2024.

Original language	English
Title of host publication	Ground-based and Airborne Instrumentation for Astronomy IX
Publisher	SPIE
ISBN (Electronic)	9781510653504
ISBN (Print)	9781510653498
DOIs	https://doi.org/10.1117/12.2630007
Publication status	Published - 29 Aug 2022
Event	SPIE Astronomical Telescopes + Instrumentation 2022 - Montréal, Canada Duration: 17 Jul 2022 → 22 Jul 2022

Publication series

Name	Proceedings of SPIE
Volume	12184
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	SPIE Astronomical Telescopes + Instrumentation 2022
Country/Territory	Canada
City	Montréal
Period	17/07/22 → 22/07/22

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10.1117/12.2630007

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title = "Development of a laser frequency comb and precision radial velocity pipeline for SALT's HRS",

abstract = "The Southern African Large Telescope (SALT) is developing precision radial velocity capability for its high-resolution spectrograph (HRS). The instrument's high-stability (HS) mode includes a fibre double scrambler and makes provision for simultaneous thorium-argon (ThAr) injection into the calibration fibre. Given the limitations associated with ThAr lamps, as well as the cost and complexity of turn-key commercial laser frequency combs (LFCs), we are in the process of designing and building a bespoke LFC for the Red channel of the HRS (555-890 nm). At a later stage we plan to extend the wavelength range of the LFC to include parts of the blue channel (370-555 nm) as well. A data reduction pipeline capable of delivering precision radial velocity results for the HS mode is also currently under development. We aim to have the LFC and PRV pipeline available for science operations in early 2024.",

author = "Crause, {Lisa Ann} and McCracken, {Richard Alexander} and Reid, {Derryck Telford} and Holdsworth, {Daniel L.} and Julie, {Roufurd P. M.} and Lizette Labuschagne and Rudi Kuhn",

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isbn = "9781510653498",

series = "Proceedings of SPIE",

publisher = "SPIE",

booktitle = "Ground-based and Airborne Instrumentation for Astronomy IX",

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note = "SPIE Astronomical Telescopes + Instrumentation 2022 ; Conference date: 17-07-2022 Through 22-07-2022",

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Crause, LA, McCracken, RA , Reid, DT, Holdsworth, DL, Julie, RPM, Labuschagne, L & Kuhn, R 2022, Development of a laser frequency comb and precision radial velocity pipeline for SALT's HRS. in Ground-based and Airborne Instrumentation for Astronomy IX., 121844V, Proceedings of SPIE, vol. 12184, SPIE, SPIE Astronomical Telescopes + Instrumentation 2022, Montréal, Quebec, Canada, 17/07/22. https://doi.org/10.1117/12.2630007

Development of a laser frequency comb and precision radial velocity pipeline for SALT's HRS. / Crause, Lisa Ann; McCracken, Richard Alexander ; Reid, Derryck Telford et al.
Ground-based and Airborne Instrumentation for Astronomy IX. SPIE, 2022. 121844V (Proceedings of SPIE; Vol. 12184).

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

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AU - Crause, Lisa Ann

AU - McCracken, Richard Alexander

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AU - Holdsworth, Daniel L.

AU - Julie, Roufurd P. M.

AU - Labuschagne, Lizette

AU - Kuhn, Rudi

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N2 - The Southern African Large Telescope (SALT) is developing precision radial velocity capability for its high-resolution spectrograph (HRS). The instrument's high-stability (HS) mode includes a fibre double scrambler and makes provision for simultaneous thorium-argon (ThAr) injection into the calibration fibre. Given the limitations associated with ThAr lamps, as well as the cost and complexity of turn-key commercial laser frequency combs (LFCs), we are in the process of designing and building a bespoke LFC for the Red channel of the HRS (555-890 nm). At a later stage we plan to extend the wavelength range of the LFC to include parts of the blue channel (370-555 nm) as well. A data reduction pipeline capable of delivering precision radial velocity results for the HS mode is also currently under development. We aim to have the LFC and PRV pipeline available for science operations in early 2024.

AB - The Southern African Large Telescope (SALT) is developing precision radial velocity capability for its high-resolution spectrograph (HRS). The instrument's high-stability (HS) mode includes a fibre double scrambler and makes provision for simultaneous thorium-argon (ThAr) injection into the calibration fibre. Given the limitations associated with ThAr lamps, as well as the cost and complexity of turn-key commercial laser frequency combs (LFCs), we are in the process of designing and building a bespoke LFC for the Red channel of the HRS (555-890 nm). At a later stage we plan to extend the wavelength range of the LFC to include parts of the blue channel (370-555 nm) as well. A data reduction pipeline capable of delivering precision radial velocity results for the HS mode is also currently under development. We aim to have the LFC and PRV pipeline available for science operations in early 2024.

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M3 - Conference contribution

SN - 9781510653498

T3 - Proceedings of SPIE

BT - Ground-based and Airborne Instrumentation for Astronomy IX

PB - SPIE

T2 - SPIE Astronomical Telescopes + Instrumentation 2022

Y2 - 17 July 2022 through 22 July 2022

ER -

Development of a laser frequency comb and precision radial velocity pipeline for SALT's HRS

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