The Keck-FOBOS spectroscopic facility: Conceptual design

Kevin Bundy; Kyle B. Westfall; Nick MacDonald; Renate Kupke; Claire Poppett; Timothy N. Miller; Jon Lawrence; Celestina Saavedra Lacombea; Renbin Yan; Michael Goodwin; Marc Kassis; John O'Meara; Daniel Masters; Joseph Burchett; Benjamin Williams; Michael Rich; V. Ashley Villar; Nathan Sandford; Yuan Sen Ting; Phil Hinz; Chad Schafer; Rachel Mandelbaum; Marina Huang; J. Xavier Prochaska; Puragra Guhathakurta

doi:10.1117/12.2562914

The Keck-FOBOS spectroscopic facility: Conceptual design

Kevin Bundy, Kyle B. Westfall, Nick MacDonald, Renate Kupke, Claire Poppett, Timothy N. Miller, Jon Lawrence, Celestina Saavedra Lacombea, Renbin Yan, Michael Goodwin, Marc Kassis, John O'Meara, Daniel Masters, Joseph Burchett, Benjamin Williams, Michael Rich, V. Ashley Villar, Nathan Sandford, Yuan Sen Ting, Phil HinzChad Schafer, Rachel Mandelbaum, Marina Huang, J. Xavier Prochaska, Puragra Guhathakurta

Physics And Astronomy

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

1 Scopus citations

Abstract

The Fiber Optic Broad-band Optical Spectrometer (FOBOS) is a high-priority spectroscopic facility concept for the W. M. Keck Observatory. Here, we provide an update on the FOBOS conceptual design. FOBOS will deploy 1800 fibers across the 20-arcminute field-of-view of the Keck II Telescope. Starbugs fiber positioners will be used to deploy individual fibers as well as fiber-bundle arrays (integral field units, IFUs). Different combinations of active single fibers or IFUs can be selected to carry light to one of three mounted spectrographs, each with a 600-fiber pseudoslit. Each spectrograph has four wavelength channels, enabling end-to-end instrument sensitivity greater than 30% from 0.31-1.0 µm at a spectral resolution of R ∼ 3500. With its high fiber density on a large telescope and modest field-of-view, FOBOS is optimized to obtain deep spectroscopy for large samples. In single-fiber mode, it will deliver premier spectroscopic reference sets for maximizing the information (e.g., photometric redshifts) that can be extracted from panoramic imaging surveys obtained from the forthcoming Rubin and Roman Observatories. Its IFUs will map emission from the circumgalactic interface between forming galaxies and the intergalactic medium at z ∼ 2-3, and lay the path for multiplexed resolved spectroscopy of high-z galaxies aided by ground-layer and multi-object adaptive optics. In the nearby universe, its high sampling density and combination of single-fiber and IFU modes will revolutionize our understanding of the M31 disk and bulge via stellar populations and kinematics. Finally, with a robust and intelligent target and program allocation system, FOBOS will be a premier facility for follow-up of rare, faint, and transient sources that can be interleaved into its suite of observing programs. With a commitment to delivering science-ready data products, FOBOS will enable unique and powerful combinations of focused, PI-led programs and community-driven observing campaigns that promise major advances in cosmology, galaxy formation, time-domain astronomy, and stellar evolution.

Original language	English
Title of host publication	Ground-Based and Airborne Instrumentation for Astronomy VIII
Editors	Christopher J. Evans, Julia J. Bryant, Kentaro Motohara
ISBN (Electronic)	9781510636811
DOIs	https://doi.org/10.1117/12.2562914
State	Published - 2020
Event	Ground-Based and Airborne Instrumentation for Astronomy VIII 2020 - Virtual, Online, United States Duration: Dec 14 2020 → Dec 22 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11447
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-Based and Airborne Instrumentation for Astronomy VIII 2020
Country/Territory	United States
City	Virtual, Online
Period	12/14/20 → 12/22/20

Bibliographical note

Funding Information:
∗For the first ten years of operation, Vera C. Rubin Observatory will perform the Rubin Observatory Legacy Survey of Space and Time (LSST). The National Science Foundation (NSF) and the US Department of Energy (DOE) are joint partners in the Rubin Observatory Project and Operations. †Euclid is led by the European Space Agency with significant NASA involvement and will launch in 2022. Its primary mission is a 15,000 deg2 imaging and grism survey in optical and near-IR wavebands. ‡Previously known as the Wide Field Infrared Survey Telescope (WFIRST), the Roman Space Telescope is expected to launch in the mid 2020’s. §The W. M. Keck Observatory (WMKO) operates the twin 10m Keck Telescopes.

Publisher Copyright:
© 2020 SPIE

Keywords

Ground-based astronomical instruments

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2562914

Cite this

Bundy, K., Westfall, K. B., MacDonald, N., Kupke, R., Poppett, C., Miller, T. N., Lawrence, J., Lacombea, C. S., Yan, R., Goodwin, M., Kassis, M., O'Meara, J., Masters, D., Burchett, J., Williams, B., Rich, M., Villar, V. A., Sandford, N., Ting, Y. S., ... Guhathakurta, P. (2020). The Keck-FOBOS spectroscopic facility: Conceptual design. In C. J. Evans, J. J. Bryant, & K. Motohara (Eds.), Ground-Based and Airborne Instrumentation for Astronomy VIII [114471D] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11447). https://doi.org/10.1117/12.2562914

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title = "The Keck-FOBOS spectroscopic facility: Conceptual design",

abstract = "The Fiber Optic Broad-band Optical Spectrometer (FOBOS) is a high-priority spectroscopic facility concept for the W. M. Keck Observatory. Here, we provide an update on the FOBOS conceptual design. FOBOS will deploy 1800 fibers across the 20-arcminute field-of-view of the Keck II Telescope. Starbugs fiber positioners will be used to deploy individual fibers as well as fiber-bundle arrays (integral field units, IFUs). Different combinations of active single fibers or IFUs can be selected to carry light to one of three mounted spectrographs, each with a 600-fiber pseudoslit. Each spectrograph has four wavelength channels, enabling end-to-end instrument sensitivity greater than 30% from 0.31-1.0 µm at a spectral resolution of R ∼ 3500. With its high fiber density on a large telescope and modest field-of-view, FOBOS is optimized to obtain deep spectroscopy for large samples. In single-fiber mode, it will deliver premier spectroscopic reference sets for maximizing the information (e.g., photometric redshifts) that can be extracted from panoramic imaging surveys obtained from the forthcoming Rubin and Roman Observatories. Its IFUs will map emission from the circumgalactic interface between forming galaxies and the intergalactic medium at z ∼ 2-3, and lay the path for multiplexed resolved spectroscopy of high-z galaxies aided by ground-layer and multi-object adaptive optics. In the nearby universe, its high sampling density and combination of single-fiber and IFU modes will revolutionize our understanding of the M31 disk and bulge via stellar populations and kinematics. Finally, with a robust and intelligent target and program allocation system, FOBOS will be a premier facility for follow-up of rare, faint, and transient sources that can be interleaved into its suite of observing programs. With a commitment to delivering science-ready data products, FOBOS will enable unique and powerful combinations of focused, PI-led programs and community-driven observing campaigns that promise major advances in cosmology, galaxy formation, time-domain astronomy, and stellar evolution.",

keywords = "Ground-based astronomical instruments",

author = "Kevin Bundy and Westfall, {Kyle B.} and Nick MacDonald and Renate Kupke and Claire Poppett and Miller, {Timothy N.} and Jon Lawrence and Lacombea, {Celestina Saavedra} and Renbin Yan and Michael Goodwin and Marc Kassis and John O'Meara and Daniel Masters and Joseph Burchett and Benjamin Williams and Michael Rich and Villar, {V. Ashley} and Nathan Sandford and Ting, {Yuan Sen} and Phil Hinz and Chad Schafer and Rachel Mandelbaum and Marina Huang and Prochaska, {J. Xavier} and Puragra Guhathakurta",

note = "Funding Information: ∗For the first ten years of operation, Vera C. Rubin Observatory will perform the Rubin Observatory Legacy Survey of Space and Time (LSST). The National Science Foundation (NSF) and the US Department of Energy (DOE) are joint partners in the Rubin Observatory Project and Operations. †Euclid is led by the European Space Agency with significant NASA involvement and will launch in 2022. Its primary mission is a 15,000 deg2 imaging and grism survey in optical and near-IR wavebands. ‡Previously known as the Wide Field Infrared Survey Telescope (WFIRST), the Roman Space Telescope is expected to launch in the mid 2020{\textquoteright}s. §The W. M. Keck Observatory (WMKO) operates the twin 10m Keck Telescopes. Publisher Copyright: {\textcopyright} 2020 SPIE; null ; Conference date: 14-12-2020 Through 22-12-2020",

year = "2020",

doi = "10.1117/12.2562914",

language = "English",

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

editor = "Evans, {Christopher J.} and Bryant, {Julia J.} and Kentaro Motohara",

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

}

Bundy, K, Westfall, KB, MacDonald, N, Kupke, R, Poppett, C, Miller, TN, Lawrence, J, Lacombea, CS, Yan, R, Goodwin, M, Kassis, M, O'Meara, J, Masters, D, Burchett, J, Williams, B, Rich, M, Villar, VA, Sandford, N, Ting, YS, Hinz, P, Schafer, C, Mandelbaum, R, Huang, M, Prochaska, JX & Guhathakurta, P 2020, The Keck-FOBOS spectroscopic facility: Conceptual design. in CJ Evans, JJ Bryant & K Motohara (eds), Ground-Based and Airborne Instrumentation for Astronomy VIII., 114471D, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11447, Ground-Based and Airborne Instrumentation for Astronomy VIII 2020, Virtual, Online, United States, 12/14/20. https://doi.org/10.1117/12.2562914

The Keck-FOBOS spectroscopic facility : Conceptual design. / Bundy, Kevin; Westfall, Kyle B.; MacDonald, Nick et al.

Ground-Based and Airborne Instrumentation for Astronomy VIII. ed. / Christopher J. Evans; Julia J. Bryant; Kentaro Motohara. 2020. 114471D (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11447).

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

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AU - MacDonald, Nick

AU - Kupke, Renate

AU - Poppett, Claire

AU - Miller, Timothy N.

AU - Lawrence, Jon

AU - Lacombea, Celestina Saavedra

AU - Yan, Renbin

AU - Goodwin, Michael

AU - Kassis, Marc

AU - O'Meara, John

AU - Masters, Daniel

AU - Burchett, Joseph

AU - Williams, Benjamin

AU - Rich, Michael

AU - Villar, V. Ashley

AU - Sandford, Nathan

AU - Ting, Yuan Sen

AU - Hinz, Phil

AU - Schafer, Chad

AU - Mandelbaum, Rachel

AU - Huang, Marina

AU - Prochaska, J. Xavier

AU - Guhathakurta, Puragra

N1 - Funding Information: ∗For the first ten years of operation, Vera C. Rubin Observatory will perform the Rubin Observatory Legacy Survey of Space and Time (LSST). The National Science Foundation (NSF) and the US Department of Energy (DOE) are joint partners in the Rubin Observatory Project and Operations. †Euclid is led by the European Space Agency with significant NASA involvement and will launch in 2022. Its primary mission is a 15,000 deg2 imaging and grism survey in optical and near-IR wavebands. ‡Previously known as the Wide Field Infrared Survey Telescope (WFIRST), the Roman Space Telescope is expected to launch in the mid 2020’s. §The W. M. Keck Observatory (WMKO) operates the twin 10m Keck Telescopes. Publisher Copyright: © 2020 SPIE

PY - 2020

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N2 - The Fiber Optic Broad-band Optical Spectrometer (FOBOS) is a high-priority spectroscopic facility concept for the W. M. Keck Observatory. Here, we provide an update on the FOBOS conceptual design. FOBOS will deploy 1800 fibers across the 20-arcminute field-of-view of the Keck II Telescope. Starbugs fiber positioners will be used to deploy individual fibers as well as fiber-bundle arrays (integral field units, IFUs). Different combinations of active single fibers or IFUs can be selected to carry light to one of three mounted spectrographs, each with a 600-fiber pseudoslit. Each spectrograph has four wavelength channels, enabling end-to-end instrument sensitivity greater than 30% from 0.31-1.0 µm at a spectral resolution of R ∼ 3500. With its high fiber density on a large telescope and modest field-of-view, FOBOS is optimized to obtain deep spectroscopy for large samples. In single-fiber mode, it will deliver premier spectroscopic reference sets for maximizing the information (e.g., photometric redshifts) that can be extracted from panoramic imaging surveys obtained from the forthcoming Rubin and Roman Observatories. Its IFUs will map emission from the circumgalactic interface between forming galaxies and the intergalactic medium at z ∼ 2-3, and lay the path for multiplexed resolved spectroscopy of high-z galaxies aided by ground-layer and multi-object adaptive optics. In the nearby universe, its high sampling density and combination of single-fiber and IFU modes will revolutionize our understanding of the M31 disk and bulge via stellar populations and kinematics. Finally, with a robust and intelligent target and program allocation system, FOBOS will be a premier facility for follow-up of rare, faint, and transient sources that can be interleaved into its suite of observing programs. With a commitment to delivering science-ready data products, FOBOS will enable unique and powerful combinations of focused, PI-led programs and community-driven observing campaigns that promise major advances in cosmology, galaxy formation, time-domain astronomy, and stellar evolution.

AB - The Fiber Optic Broad-band Optical Spectrometer (FOBOS) is a high-priority spectroscopic facility concept for the W. M. Keck Observatory. Here, we provide an update on the FOBOS conceptual design. FOBOS will deploy 1800 fibers across the 20-arcminute field-of-view of the Keck II Telescope. Starbugs fiber positioners will be used to deploy individual fibers as well as fiber-bundle arrays (integral field units, IFUs). Different combinations of active single fibers or IFUs can be selected to carry light to one of three mounted spectrographs, each with a 600-fiber pseudoslit. Each spectrograph has four wavelength channels, enabling end-to-end instrument sensitivity greater than 30% from 0.31-1.0 µm at a spectral resolution of R ∼ 3500. With its high fiber density on a large telescope and modest field-of-view, FOBOS is optimized to obtain deep spectroscopy for large samples. In single-fiber mode, it will deliver premier spectroscopic reference sets for maximizing the information (e.g., photometric redshifts) that can be extracted from panoramic imaging surveys obtained from the forthcoming Rubin and Roman Observatories. Its IFUs will map emission from the circumgalactic interface between forming galaxies and the intergalactic medium at z ∼ 2-3, and lay the path for multiplexed resolved spectroscopy of high-z galaxies aided by ground-layer and multi-object adaptive optics. In the nearby universe, its high sampling density and combination of single-fiber and IFU modes will revolutionize our understanding of the M31 disk and bulge via stellar populations and kinematics. Finally, with a robust and intelligent target and program allocation system, FOBOS will be a premier facility for follow-up of rare, faint, and transient sources that can be interleaved into its suite of observing programs. With a commitment to delivering science-ready data products, FOBOS will enable unique and powerful combinations of focused, PI-led programs and community-driven observing campaigns that promise major advances in cosmology, galaxy formation, time-domain astronomy, and stellar evolution.

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ER -

The Keck-FOBOS spectroscopic facility: Conceptual design

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

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