Dr. Josh Walawender Profile

Dr. Josh Walawender

Staff Astronomer at W M Keck Observatory

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 22 July 2024 Presentation + Paper

Presentation + Paper

Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. III

Marc Kassis, Carlos Alvarez, Ashley Baker, Jeb Bailey, Ravinder Banyal, Robert Bertz, Charles Beichman, Antonin Bouchez, Aaron Brown, Matthew Brown, Kevin Bundy, Randall Campbell, Mark Chun, Jeff Cooke, William Deich, Richard Dekany, Greg Doppmann, Christopher Fassnacht, Jocelyn Ferrara, Michael Fitzgerald, Christoffer Fremling, Jason Fucik, Steven Gibson, Peter Gillingham, Karl Glazebrook, Timothee Greffe, Samuel Halverson, Grant Hill, Lynne Hillenbrand, Philip Hinz, Bradford Holden, Andrew Howard, Daniel Huber, Tucker Jones, Carolyn Jordan, Nemanja Jovanovic, Isabell Kain, Mansi Kasliwal, Evan Kirby, Quinn Konopacky, Shanti Krishnan, Shri Kulkarni, Renate Kupke, Kyle Lanclos, James Larkin, Scott Lilley, Larry Lingvay, Jessica Lu, James Lyke, Nicholas MacDonald, Christopher Martin, John Mather, Mateusz Matuszewski, Dimitri Mawet, Rosalie McGurk, Eduardo Marin, Bob Meeks, Maxwell Millar-Blanchaer, Reston Nash, James Neill, John O'Meara, Rishi Pahuja, Eliad Peretz, Nikolaus Prusinski, Matthew Radovan, Kodi Rider, Mitsuko Roberts, Connie Rockosi, Ryan Rubenzahl, Stephanie Sallum, Dale Sandford, Maureen Savage, Andy Skemer, Roger Smith, Charles Steidel, Jonathan Steiner, Deno Stelter, Josh Walawender, Kyle Westfall, Peter Wizinowich, Shelley Wright, Truman Wold, Jake Zimmer

Proceedings Volume 13096, 1309606 (2024) https://doi.org/10.1117/12.3016181

KEYWORDS: Equipment, Adaptive optics, Design, Observatories, Spectrographs, Imaging systems, Sensors, Telescopes, Spectroscopy, Imaging spectroscopy

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Proceedings Article | 18 July 2024 Presentation + Paper

Presentation + Paper

System design of the Keck Planet Finder

Steven Gibson, Andrew Howard, Kodi Rider, Samuel Halverson, Arpita Roy, Ashley Baker, Jerry Edelstein, Christopher Smith, Benjamin Fulton, Josh Walawender, Max Brodheim, Matthew Brown, Dwight Chan, Fei Dai, William Deich, Colby Gottschalk, Jason Grillo, David Hale, Grant Hill, Bradford Holden, Aaron Householder, Howard Isaacson, Yuzo Ishikawa, Sharon Jelinsky, Marc Kassis, Stephen Kaye, Russ Laher, Kyle Lanclos, Chien-Hsiu Lee, Scott Lilley, Benjamin McCarney, Timothy Miller, Joel Payne, Erik Petigura, Claire Poppett, Michael Raffanti, Ryan Rubenzahl, Dale Sandford, Christian Schwab, Abby Shaum, Martin Sirk, Roger Smith, Jim Thorne, John Valliant, Adam Vandenberg, Shin-Ywan Wang, Edward Wishnow, Truman Wold, Sherry Yeh, Steve Baca, Charles Beichman, Bruce Berriman, Thomas Brown, Kelleen Casey, Jason Chin, James Chong, David Cowley, Mark Devenot, Hamza Elwir, Daniel Finstad, Matthew Fraysse, Ean James, Elisha Jhoti, Joe Killian, Obie Levine, Adela Chenyang Li, Eduardo Marin, Steven Milner, Craig Nance, Timothy O'Hanlon, Daniel Orr, Roberto Ortiz-Soto, Tom Payne, Jacob Pember, Gert Raskin, Maureen Savage, Andreas Seifahrt, Brett Smith, Rob Storesund, Julian Stürmer, Nick Suominen, Jerez Tehero, Tod Von Boeckmann, Keith Wages, Marie Weisfeiler, Mavourneen Wilcox, Peter Wizinowich, Anna Wolfenberger

Proceedings Volume 13096, 1309609 (2024) https://doi.org/10.1117/12.3017841

KEYWORDS: Spectroscopy, Equipment, Calibration, Design, Planets, Telescopes, Cameras, Zerodur, Charge-coupled devices, Doppler effect

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Modernizing observation planning for accessible, science-ready data

Matthew K. Brown, John O'Meara, Max Broadheim, Lucas Furhman, Chien-Hsiu Lee, Michael Lundquist, Jeffrey A. Mader, Tyler Tucker, Josh Walawender

Proceedings Volume 12189, 121890T (2022) https://doi.org/10.1117/12.2630769

KEYWORDS: Control systems, Databases, Telescopes, Keck Observatory, Telecommunications, Optical coherence tomography, Visualization, Standards development, Observatories, Nomenclature

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. II

Marc Kassis, Steve Allen, Carlos Alvarez, Ravinder Banyal, Robert Bertz, Charles Beichman, Aaron Brown, Matthew Brown, Gerald Cabak, Kevin Bundy, Sylvain Cetre, Jason Chin, Mark Chun, Will Deich, Richard Dekany, Jacques Delorme, Mark Devenot, Greg Doppmann, Michael Fitzgerald, Jason Fucik, Grant Hill, Philip Hinz, Bradford Holden, Andrew Howard, Maodong Gao, Steve Gibson, Percy Gomez, Colby Gottschalk, Peter Gillingham, Tucker Jones, Nemanja Jovanovic, Evan Kirby, Quinn Konopacky, Shanti Krishnan, Renate Kupke, James Larkin, Stephanie Leifer, Hilton Lewis, Scott Lilley, Jessica Lu, James Lyke, Nick MacDonald, Eduardo Marin, Matt Matuszewski, Dimitri Mawet, Rosalie McGurk, Maxwell Millar-Blanchaer, Reston Nash, Craig Nance, James Neill, John O'Meara, Eliad Peretz, Claire Poppett, John Mather, Matthew Radovan, Mitsuko Roberts, Sam Ragland, Kodi Rider, Constance Rockosi, Dale Sandfor, Boqiang Shen, Charles Steidel, Sunil Simha, Andy Skemer, Deno Stelter, Avinash Surendran, James Thorne, Ben McCarney, Kyle Lanclos, Ashley Baker, Ryan Rubenzahl, Arpita Roy, Sam Halverson, Jerry Edelstein, Christopher Martin, Maureen Savage, Dale Sandford, Stephanie Sallum, Josh Walawender, Peter Wizinowich, Kyle Westfall, Kerry Vahala, Shelley Wright, Truman Wold, Sherry Yeh

Proceedings Volume 12184, 1218405 (2022) https://doi.org/10.1117/12.2628630

KEYWORDS: Adaptive optics, Spectrographs, Exoplanets, Sensors, Spectroscopy, Imaging systems, Telescopes, Planets, Cameras, Observatories

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

A fiber injection unit for the Keck Planet Finder: opto-mechanical design

Scott Lilley, Kodi Rider, Jim Thorne, Marc Kassis, Steve Gibson, Andrew Howard, Kyle Lanclos, Josh Walawender

Proceedings Volume 12184, 121844K (2022) https://doi.org/10.1117/12.2628818

KEYWORDS: Calcium, Calibration, Fiber science, Adaptive optics, Telescopes, Cameras, Computer aided design, Solid modeling, Mirrors, Optical design

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Proceedings Article | 29 August 2022 Presentation

Presentation

The W.M. Keck Observatory Data Services Initiative: Creating data that is useful, usable, and quick

John O'Meara, Matthew Brown, Jeffrey Mader, Max Brodheim, Tyler Tucker, Josh Walawender, Lucas Fuhrman, Michael Lundquist, Luca Rizzi, Marc Kassis, Charles Beichman, Sean Carey, Bruce Berriman, Meca Lynn

Proceedings Volume 12186, 121860G (2022) https://doi.org/10.1117/12.2629073

KEYWORDS: Data archive systems, Keck Observatory, Observatories, Calibration, Databases, Astronomy

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Proceedings Article | 25 August 2022 Presentation + Paper

Presentation + Paper

Towards a greener W. M. Keck Observatory

Kevin McCann, Craig Nance, Gavin Sebastian, Josh Walawender

Proceedings Volume 12186, 1218608 (2022) https://doi.org/10.1117/12.2630721

KEYWORDS: Carbon, Carbon dioxide, Observatories, Telescopes, Climatology, Climate change, Astronomy, Keck Observatory, Energy efficiency

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Proceedings Article | 25 August 2022 Presentation + Paper

Presentation + Paper

Broadening access to remote observing at W. M. Keck Observatory

Josh Walawender, Josh Riley, Jeff Mader, Matt Brown, Kyle Lanclos

Proceedings Volume 12186, 121860Z (2022) https://doi.org/10.1117/12.2624258

KEYWORDS: Telescopes, Observatories, Telecommunications, Keck Observatory, Software development, Networks

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SPIE Journal Paper | 8 October 2021

On-sky demonstration of precision photometry with Bayer color filter arrays

Wilfred Gee, Olivier Guyon, Nemanja Jovanovic, Christian Schwab, David Coutts, Josh Walawender, Aru Mukherjea

JATIS, Vol. 7, Issue 04, 048001, (October 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.4.048001

KEYWORDS: Stars, Photometry, Detection and tracking algorithms, Optical filters, RGB color model, Exoplanets, Cameras, Sensors, Astronomy, Calibration

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

PANOPTES: A citizen science project to discover exoplanets from your backyard using off-the-shelf hardware

Preethi Krishnamoorthy, Josh Walawender, Wilfred Tyler Gee, Olivier Guyon

Proceedings Volume 11445, 114452J (2020) https://doi.org/10.1117/12.2563188

KEYWORDS: Exoplanets, Astronomy, Observatories, Robots

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

Flexure updates to MOSFIRE on the Keck I telescope

Taylor Hutchison, Josh Walawender, Shui Hung Kwok

Proceedings Volume 11447, 114476A (2020) https://doi.org/10.1117/12.2562864

KEYWORDS: Telescopes, Imaging systems, Astronomical imaging, Spectroscopy, Stars, Fluorescence correlation spectroscopy, Cameras, Atmospheric corrections

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Proceedings Article | 10 July 2018 Presentation

Presentation

Project PANOPTES: the good, the bad, and the ugly challenges of running a successful Pro-Am astronomy project (Conference Presentation)

Wilfred Gee, Christian Schwab, David Coutts, Olivier Guyon, Josh Walawender

Proceedings Volume 10707, 1070702 (2018) https://doi.org/10.1117/12.2314317

KEYWORDS: Astronomy, Cameras, Software development, Exoplanets, Lenses, Data analysis, Observatories, Clouds

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PANOPTES is a citizen-science based project to discover exoplanets with consumer cameras. It is open source and aims to be highly efficient at collecting photometric data by running a wide field survey using DSLR cameras and standard lenses. In the two years since the demonstration of the baseline design at SPIE 2016 the project has moved forward in getting the hardware design ready for citizen scientists and data analysis, benefiting from an influx of both professional and amateur support. At the same time the project has experienced a number of challenges related to the nature of a grassroots project with no specific institutional home. Here we present a status update to the project with a focus on the issues associated with creating, and maintaining, a successful “pro-am” astronomy project. This talk will specifically focus on a couple of keys concepts related to the operation of PANOPTES as a distributed observatory built by a collection of professional and amateur astronomers. These concepts can largely be broken down as: software; hardware; and organizational. However, a central theme of the talk will also be the fact that PANOPTES operates without a centralized institution, which means that decisions related to software and hardware are necessarily tied into the organizational decisions. Likewise, since the project has no official operating budget but operates largely off the budgets of each individual team (in addition to a NASA/JPL grant, the attainment of which will also be discussed), the hardware decisions and the evolving landscape of commercial over-the-counter (COTC) hardware play a significant role in the operation and maintenance of the project as a whole, which in turn affects how the software is developed. Through all of these areas PANOPTES has experienced successes and failures as well as simple deviations from original plans. As a project we have benefited enormously from the donation of time and storage on the Google Cloud Platform (GCP), allowing us to explore technologies and solutions that would otherwise be unfeasible, but as an unofficial project we have been unable to secure a permanent formal agreement with GCP, creating challenges related to the long-term viability of those software solutions. Being a unique project that aims to be as scientifically productive as it is successful as an outreach tool, it is hoped that the talk will provide some valuable learned lessons for any future projects that hope to utilize the unique professional-amateur dynamic that exists within the field of astronomy and open-source software.

Proceedings Article | 9 August 2016 Paper

Paper

The nuMOIRCS project: detector upgrade overview and early commissioning results

Josh Walawender, Matthew Wung, Maximilian Fabricius, Ichi Tanaka, Nobuo Arimoto, David Cook, Brian Elms, Yasuhito Hashiba, Yen-Sang Hu, Ikuru Iwata, Tetsuo Nishimura, Koji Omata, Naruhisa Takato, Shiang-Yu Wang, Mark Weber

Proceedings Volume 9908, 99082G (2016) https://doi.org/10.1117/12.2231812

KEYWORDS: Sensors, Control systems, Telescopes, Cryogenics, Electronics, Computing systems, Human-machine interfaces, Power supplies, Imaging systems, Interfaces

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Proceedings Article | 9 August 2016 Paper

Paper

Detector upgrade of Subaru's Multi-object Infrared Camera and Spectrograph (MOIRCS)

Maximilian Fabricius, Joshua Walawender, Nobuo Arimoto, David Cook, Brian Elms, Yasuhito Hashiba, Takashi Hattori, Yen-Sang Hu, Ikuru Iwata, Tetsuo Nishimura, Koji Omata, Philip Tait, Naruhisa Takato, Ichi Tanaka, Shiang-Yu Wang, Mark Weber, Matthew Wung

Proceedings Volume 9908, 990828 (2016) https://doi.org/10.1117/12.2231417

KEYWORDS: Sensors, Astronomical imaging, Infrared sensors, Spectrographs, Infrared cameras, Electronics, Cryogenics, Sensors, Infrared sensors, Astronomical imaging, Coating, Molybdenum, Optical benches

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Proceedings Article | 9 August 2016 Paper

Paper

Project PANOPTES: a citizen-scientist exoplanet transit survey using commercial digital cameras

Wilfred Gee, Olivier Guyon, Josh Walawender, Nemanja Jovanovic, Luc Boucher

Proceedings Volume 9908, 99085V (2016) https://doi.org/10.1117/12.2234461

KEYWORDS: Exoplanets, Digital cameras, Astronomy, Cameras, Planets, Astronomy, Stars, Observatories, Electroluminescent displays, Photometry, Electronics

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Proceedings Article | 22 July 2014 Paper

Paper

The PANOPTES project: discovering exoplanets with low-cost digital cameras

Olivier Guyon, Josh Walawender, Nemanja Jovanovic, Mike Butterfield, Wilfred Gee, Rawad Mery

Proceedings Volume 9145, 91453V (2014) https://doi.org/10.1117/12.2057288

KEYWORDS: Cameras, Exoplanets, Prototyping, Algorithm development, Observatories, Sensors, Stars, Photometry, Digital cameras, Telescopes

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Showing 5 of 16 publications

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