The WIYN one degree imager in 2018: An extended 30-detector focal plane

Daniel R. Harbeck; Mike Lesser; Wilson Liu; Bob Stupak; Ron George; Ron Harris; Gary Poczulp; Jayadev Rajagopal; Ralf Kotulla; David Ouellete; Eric J. Hooper; Michael Smith; Dustin Mason; Peter Onaka; Greg Chin; Emily Hunting; Robert Christensen

doi:10.1117/12.2311528

The WIYN one degree imager in 2018: An extended 30-detector focal plane

Daniel R. Harbeck, Mike Lesser, Wilson Liu, Bob Stupak, Ron George, Ron Harris, Gary Poczulp, Jayadev Rajagopal, Ralf Kotulla, David Ouellete, Eric J. Hooper, Michael Smith, Dustin Mason, Peter Onaka, Greg Chin, Emily Hunting, Robert Christensen

Steward Observatory

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

Abstract

We report on the upgraded One Degree Imager (ODI) at the WIYN 3.5 meter telescope at the Kitt Peak Observatory after the focal plane was expanded by an additional seventeen detectors in spring 2015. The now thirty Orthogonal Transfer Array CCD detectors provide a total field of view of 40' x 48' on the sky. The newly added detectors underwent a design revision to mitigate reduced charge transfer efficiency under low light conditions. We discuss the performance of the focal plane and challenges in the photometric calibration of the wide field of view, helped by the addition of telescope baffles. In a parallel project, we upgraded the instrument's three filter arm mechanisms, where a degrading worm-gear mechanism was replaced by a chain drive that is operating faster and with high reliability. Three more filters, a u' band and two narrow band filters were added to the instrument's complement, with two additional narrow band filters currently in procurement (including an Hα filter). We review the lessons learned during nearly three years of operating the instrument in the observatory environment and discuss infrastructure upgrades that were driven by ODI's needs.

Original language	English (US)
Title of host publication	Ground-based and Airborne Instrumentation for Astronomy VII
Editors	Luc Simard, Luc Simard, Christopher J. Evans, Hideki Takami
Publisher	SPIE
ISBN (Print)	9781510619579
DOIs	https://doi.org/10.1117/12.2311528
State	Published - 2018
Event	Ground-based and Airborne Instrumentation for Astronomy VII 2018 - Austin, United States Duration: Jun 10 2018 → Jun 14 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10702
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Other

Other	Ground-based and Airborne Instrumentation for Astronomy VII 2018
Country	United States
City	Austin
Period	6/10/18 → 6/14/18

Keywords

CCD
Ground based instrumentation
Observatory Operations
Orthogonal Transfer Array
WIYN Observatory
wide field imaging

ASJC Scopus subject areas

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

Access to Document

10.1117/12.2311528

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Harbeck, D. R., Lesser, M., Liu, W., Stupak, B., George, R., Harris, R., Poczulp, G., Rajagopal, J., Kotulla, R., Ouellete, D., Hooper, E. J., Smith, M., Mason, D., Onaka, P., Chin, G., Hunting, E., & Christensen, R. (2018). The WIYN one degree imager in 2018: An extended 30-detector focal plane. In L. Simard, L. Simard, C. J. Evans, & H. Takami (Eds.), Ground-based and Airborne Instrumentation for Astronomy VII [1070229] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10702). SPIE. https://doi.org/10.1117/12.2311528

The WIYN one degree imager in 2018 : An extended 30-detector focal plane. / Harbeck, Daniel R.; Lesser, Mike; Liu, Wilson; Stupak, Bob; George, Ron; Harris, Ron; Poczulp, Gary; Rajagopal, Jayadev; Kotulla, Ralf; Ouellete, David; Hooper, Eric J.; Smith, Michael; Mason, Dustin; Onaka, Peter; Chin, Greg; Hunting, Emily; Christensen, Robert.

Ground-based and Airborne Instrumentation for Astronomy VII. ed. / Luc Simard; Luc Simard; Christopher J. Evans; Hideki Takami. SPIE, 2018. 1070229 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10702).

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

Harbeck, DR, Lesser, M, Liu, W, Stupak, B, George, R, Harris, R, Poczulp, G, Rajagopal, J, Kotulla, R, Ouellete, D, Hooper, EJ, Smith, M, Mason, D, Onaka, P, Chin, G, Hunting, E & Christensen, R 2018, The WIYN one degree imager in 2018: An extended 30-detector focal plane. in L Simard, L Simard, CJ Evans & H Takami (eds), Ground-based and Airborne Instrumentation for Astronomy VII., 1070229, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10702, SPIE, Ground-based and Airborne Instrumentation for Astronomy VII 2018, Austin, United States, 6/10/18. https://doi.org/10.1117/12.2311528

Harbeck DR, Lesser M, Liu W, Stupak B, George R, Harris R et al. The WIYN one degree imager in 2018: An extended 30-detector focal plane. In Simard L, Simard L, Evans CJ, Takami H, editors, Ground-based and Airborne Instrumentation for Astronomy VII. SPIE. 2018. 1070229. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2311528

Harbeck, Daniel R. ; Lesser, Mike ; Liu, Wilson ; Stupak, Bob ; George, Ron ; Harris, Ron ; Poczulp, Gary ; Rajagopal, Jayadev ; Kotulla, Ralf ; Ouellete, David ; Hooper, Eric J. ; Smith, Michael ; Mason, Dustin ; Onaka, Peter ; Chin, Greg ; Hunting, Emily ; Christensen, Robert. / The WIYN one degree imager in 2018 : An extended 30-detector focal plane. Ground-based and Airborne Instrumentation for Astronomy VII. editor / Luc Simard ; Luc Simard ; Christopher J. Evans ; Hideki Takami. SPIE, 2018. (Proceedings of SPIE - The International Society for Optical Engineering).

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abstract = "We report on the upgraded One Degree Imager (ODI) at the WIYN 3.5 meter telescope at the Kitt Peak Observatory after the focal plane was expanded by an additional seventeen detectors in spring 2015. The now thirty Orthogonal Transfer Array CCD detectors provide a total field of view of 40' x 48' on the sky. The newly added detectors underwent a design revision to mitigate reduced charge transfer efficiency under low light conditions. We discuss the performance of the focal plane and challenges in the photometric calibration of the wide field of view, helped by the addition of telescope baffles. In a parallel project, we upgraded the instrument's three filter arm mechanisms, where a degrading worm-gear mechanism was replaced by a chain drive that is operating faster and with high reliability. Three more filters, a u' band and two narrow band filters were added to the instrument's complement, with two additional narrow band filters currently in procurement (including an Hα filter). We review the lessons learned during nearly three years of operating the instrument in the observatory environment and discuss infrastructure upgrades that were driven by ODI's needs.",

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doi = "10.1117/12.2311528",

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AU - Harris, Ron

AU - Poczulp, Gary

AU - Rajagopal, Jayadev

AU - Kotulla, Ralf

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AB - We report on the upgraded One Degree Imager (ODI) at the WIYN 3.5 meter telescope at the Kitt Peak Observatory after the focal plane was expanded by an additional seventeen detectors in spring 2015. The now thirty Orthogonal Transfer Array CCD detectors provide a total field of view of 40' x 48' on the sky. The newly added detectors underwent a design revision to mitigate reduced charge transfer efficiency under low light conditions. We discuss the performance of the focal plane and challenges in the photometric calibration of the wide field of view, helped by the addition of telescope baffles. In a parallel project, we upgraded the instrument's three filter arm mechanisms, where a degrading worm-gear mechanism was replaced by a chain drive that is operating faster and with high reliability. Three more filters, a u' band and two narrow band filters were added to the instrument's complement, with two additional narrow band filters currently in procurement (including an Hα filter). We review the lessons learned during nearly three years of operating the instrument in the observatory environment and discuss infrastructure upgrades that were driven by ODI's needs.

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