Dr. Joseph N. Burchett Profile

Dr. Joseph N. Burchett

at Univ of California Observatories

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 21 August 2024 Presentation + Paper

Aspera payload design overview: UV SmallSat mission to detect and map warm-hot halo gas around the nearby galaxies

Haeun Chung, Carlos Vargas, Erika Hamden, Tom McMahon, Hannah Tanquary, Aafaque Khan, Fernando Coronado, Bill Verts, Nicole Melso, Heejoo Choi, Simran Agarwal, Jason Corliss, Keri Hoadley, Miriam Keppler, Dave Hamara, Elijah Garcia, Daniel Truong, Naomi Yescas, Ramona Augustin, Mateo Batkis, Peter Behroozi, Harrison Bradley, Trenton Brendel, Joseph Burchett, Jasmine Martinez Castillo, Jacob Chambers, Lauren Corlies, Greyson Davis, Ralf-Jürgen Dettmar, Ewan Douglas, Giulia Ghidoli, Alfred Goodwin, Walter Harris, John Hennessy, Carl Hergenrother, J. Christopher Howk, Nazende Ipek Kerkeser, John Kidd, Daewook Kim, Jessica Li, Adrian Martin, Jamison Noenickx, Gabe Noriega, Sooseong Park, Ryan Pecha, Manuel Quijada, L. Rodriguez de Marcos, Cork Sauve, David Schiminovich, Sanford Selznick, Oswald Siegmund, Rebecca Su, Sumedha Uppnor, Ellie Wolcott, Dennis Zaritsky

Proceedings Volume 13093, 1309302 (2024) https://doi.org/10.1117/12.3017274

KEYWORDS: Optical gratings, Microchannel plates, Spectrographs, Optical coatings, Optical alignment, Spectral resolution

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Proceedings Article | 21 August 2024 Presentation + Paper

Optical alignment of contamination-sensitive far-ultraviolet spectrographs for Aspera SmallSat mission

Aafaque Khan, Erika Hamden, Haeun Chung, Heejoo Choi, Daewook Kim, Nicole Melso, Keri Hoadley, Carlos Vargas, Daniel Truong, Elijah Garcia, Bill Verts, Fernando Coronado, Jamison Noenickx, Jason Corliss, Hannah Tanquary, Tom McMahon, Dave Hamara, Simran Agarwal, Ramona Augustin, Peter Behroozi, Harrison Bradley, Trenton Brendel, Joe Burchett, Jasmine Martinez Castillo, Jacob Chambers, Lauren Corlies, Greyson Davis, Ralf-Jürgen Dettmar, Ewan Douglas, Giulia Ghidoli, Alfred Goodwin, Walter Harris, Carl Hergenrother, J. Christopher Howk, Miriam Keppler, Nazende Ipek Kerkeser, John Kidd, Jessica Li, Gabe Noriega, Sooseong Park, Ryan Pecha, Cork Sauve, David Schiminovich, Sanford Selznic, Oswald Siegmund, Rebecca Su, Sumedha Uppnor, Jacob Vider, Ellie Wolcott, Naomi Yescas, Dennis Zaritsky

Proceedings Volume 13093, 130930A (2024) https://doi.org/10.1117/12.3020822

KEYWORDS: Ultraviolet astronomy, 3D metrology, Far ultraviolet, Optical alignment, Computer generated holography, Tolerancing, Prototyping, Microchannel plates, Vacuum, Contamination, Spectrographs

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Proceedings Article | 21 August 2024 Poster + Paper

Ultraviolet reflective grating performance verification test setup and simulations for the Aspera SmallSat mission

Jessica Li, Rebecca Su, Sumedha Uppnor, Haeun Chung, Jason Corliss, Simran Agarwal, Aafaque Khan, Elijah Garcia, Naomi Yescas, Daniel Truong, Carlos Vargas, Erika Hamden, Ramona Augustin, Peter Behroozi, Joe Burchett, Heejoo Choi, Lauren Corlies, Greyson Davis, Ralf-Jürgen Dettmar, Ewan Douglas, Carl Hergenrother, Keri Hoadley, J. Christopher Howk, Miriam Keppler, Daewook Kim, Nicole Melso, David Schiminovich, Fernando Coronado, Giulia Ghidoli, Alfred Goodwin, Dave Hamara, Walter Harris, Karl Harshman, John Kidd, Tom McMahon, Jamison Noenickx, Gabe Noriega, Ryan Pecha, Cork Sauve, Sanford Selznick, Hannah Tanquary, Bill Verts, Ellie Wolcott, Dennis Zaritsky

Proceedings Volume 13093, 130932W (2024) https://doi.org/10.1117/12.3017215

KEYWORDS: Optical gratings, Vacuum, Mirrors, Optical alignment, Diffraction gratings, Simulations, Optical fabrication, Microchannel plates, Vacuum chambers, Sensors

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Proceedings Article | 21 August 2024 Presentation + Paper

The Line Emission Mapper (LEM) probe mission concept

R. Kraft, Á. Bogdán, J. ZuHone, J. Adams, J. Alvarado-Gómez, C. Argiroffi, M. Ayromlou, M. Azadi, S. Bandler, M. Barbera, A. Bhardwaj, V. Biffi, D. Bodewits, E. Boettcher, B. Branham, J. Burchett, D. Burke, J. Cann, J. Carter, D. Castro, P. Chakraborty, K. Chan, S. Chen, E. Churazov, K. Coderre, M. Corcoran, R. Cumbee, S. DePalo, K. Dolag, M. Donahue, W. Doriese, J. Drake, W. Dunn, M. Eckart, D. Eckert, S. Ettori, Y. Ezoe, C. Feldman, E. Flaccomio, W. Forman, M. Galeazzi, A. Gall, C. Garraffo, M. Gonzalez, N. Grosso, J. Hartley, N. Hell, L. Hernquist, E. Hodges-Kluck, J. Houston, S. Hull, N. Islam, P. Janas, F. Jennings, C. Jones, P. Kaaret, H. Kanner, M. Karovska, V. Kashyap, P. Kavanagh, R. Kelley, I. Khabibullin, C. Kilbourne, C.-G. Kim, D. Koutroumpa, O. Kovács, K. Kuntz, S.-H. Lee, M. Leutenegger, T. Linn, S. Lotti, M. Markevitch, K. Martin, L. May, D. McCammon, S. McEntee, S. Mei, F. Mernier, M. Miceli, J. Miller, M. Mirakhor, K. Monsch, Y. Nazé, D. Nelson, A. Nordt, A. Ogorzalek, J. Olson, S. Orlando, E. Osborne, L. Oskinova, D. Patnaude, R. Pfeifle, C. Pinto, P. Plucinsky, G. Ponti, D. Porquet, F. Porter, D. Préle, S. Ramm, S. Randall, E. Rasia, M. Rau, S. Richardson, K. Sakai, A. Sarkar, G. Schellenberger, S. Sciortino, J. Schaye, A. Simionescu, S. Smith, M. Sobolewska, J. Steiner, J. Stern, Y. Su, M. Sun, N. Truong, E. Ursino, M. Valentini, S. Veilleux, S. Vladutescu-Zopp, M. Vogelsberger, N. Wakeham, S. Walker, Q. Wang, B. Wargelin, K. Weaver, J. Werk, N. Werner, S. Wolk, C. Zhang, W. Zhang, I. Zhuravleva

Proceedings Volume 13093, 1309327 (2024) https://doi.org/10.1117/12.3019969

KEYWORDS: X-rays, Galactic astronomy, Stars, Bubbles, Spectral resolution, Iron, Physics, Spectroscopy, Metals, Plasma

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The Line Emission Mapper (LEM) is a Probe mission concept developed in response to NASA’s Astrophysics Probe Explorer (APEX) Announcement of Opportunity. LEM has a single science instrument composed of a large-area, wide-field X-ray optic and a microcalorimeter X-ray imaging spectrometer in the focal plane. LEM is optimized to observe low-surface-brightness diffuse X-ray emission over a 30′ equivalent diameter field of view with 1.3 and 2.5 eV spectral resolution in the 0.2−2.0 keV band. Our primary scientific objective is to map the thermal, kinetic, and elemental properties of the diffuse gas in the extended X-ray halos of galaxies, the outskirts of galaxy clusters, the filamentary structures between these clusters, the Milky Way star-formation regions, the Galactic halo, and supernova remnants in the Milky Way and Local Group. The combination of a wide-field optic with 18′′ angular resolution end-to-end and a microcalorimeter array with 1.3 eV spectral resolution in a 5′ × 5′ inner array (2.5 eV outside of that) offers unprecedented sensitivity to extended low-surface-brightness X-ray emission. This allows us to study feedback processes, gas dynamics, and metal enrichment over seven orders of magnitude in spatial scales, from parsecs to tens of megaparsecs. LEM will spend approximately 11% of its five-year prime science mission performing an All-Sky Survey, the first all-sky X-ray survey at high spectral resolution. The remainder of the five-year science mission will be divided between directed science (30%) and competed General Observer science (70%). LEM and the NewAthena/XIFU are highly complementary, with LEM’s optimization for soft X-rays, large FOV, 1.3 eV spectral resolution, and large grasp balancing the NewAthena/X-IFU’s broadband sensitivity, large effective area, and unprecedented spectral resolving power at 6 keV. In this presentation, we will provide an overview of the mission architecture, the directed science driving the mission design, and the broad scope these capabilities offer to the entire astrophysics community.

Proceedings Article | 25 July 2024 Presentation + Paper

Development of a data reduction pipeline for the Aspera SmallSat mission

Miriam Keppler, Haeun Chung, Aafaque Khan, Carl Hergenrother, Carlos Vargas, Jacob Chambers, Jacob Vider, Sanford Selznick, Giulia Ghidoli, Hannah Tanquary, Erika Hamden, J. Christopher Howk, Simran Agarwal, Ramona Augustin, Peter Behroozi, Joe Burchett, Heejoo Choi, Lauren Corlies, Jason Corliss, Fernando Coronado, Greyson Davis, Ralf-Jürgen Dettmar, Ewan Douglas, Elijah Garcia, Alfred Goodwin, Dave Hamara, Walt Harris, Keri Hoadley, John Kidd, Daewook Kim, Jessica Li, Tom McMahon, Nicole Melso, Jamison Noenickx, Gabe Noriega, Ryan Pecha, Cork Sauve, David Schiminovich, Siegmund Oswald, Daniel Truong, Sumedha Uppnor, Bill Verts, Ellie Wollcott, Naomi Yescas, Dennis Zaritsky, Harrison Bradley, Trenton Brendel

Proceedings Volume 13101, 131011Q (2024) https://doi.org/10.1117/12.3017883

KEYWORDS: Calibration, Sensors, Microchannel plates, Device simulation, Space operations, Image processing, Data processing, Extragalactic astronomy, Software development

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Proceedings Article | 13 December 2020 Presentation + Paper

The Keck-FOBOS spectroscopic facility: conceptual design

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

Proceedings Volume 11447, 114471D (2020) https://doi.org/10.1117/12.2562914

KEYWORDS: Imaging spectroscopy, Spectrographs, Spectroscopy, Panoramic photography, Large Synoptic Survey Telescope, Telescopes, Excel, Cameras

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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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