Dr. Matthew L. N. Ashby Profile

Dr. Matthew L. N. Ashby

Astrophysicist at Harvard-Smithsonian Ctr for Astrophysics

SPIE Involvement:

Author

Publications (13)

SPIE Journal Paper | 27 September 2021 Open Access

Warm Spitzer IRAC photometry: dependencies on observing mode and exposure time

Jessica Krick, Patrick Lowrance, Sean Carey, Jason Surace, Carl Grillmair, Seppo Laine, Schuyler Van Dyk, James Ingalls, Matthew L. Ashby, Steven Willner

JATIS, Vol. 7, Issue 03, 038006, (September 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.3.038006

KEYWORDS: Stars, Photometry, Calibration, Signal to noise ratio, Time metrology, Sensors, Infrared telescopes, Space telescopes, Solids, Photons

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 13 December 2020 Presentation + Paper

SPHEREx: NASA's near-infrared spectrophotometric all-sky survey

Brendan Crill, Michael Werner, Rachel Akeson, Matthew Ashby, Lindsey Bleem, James Bock, Sean Bryan, Jill Burnham, Joyce Byunh, Tzu-Ching Chang, Yi-Kuan Chiang, Walter Cook, Asantha Cooray, Andrew Davis, OIivier Doré, C. Darren Dowell, Gregory Dubois-Felsmann, Tim Eifler, Andreas Faisst, Salman Habib, Chen Heinrich, Katrin Heitmann, Grigory Heaton, Christopher Hirata, Viktor Hristov, Howard Hui, Woong-Seob Jeong, Jae Hwan Kang, Branislav Kecman, J. Davy Kirkpatrick, Phillip Korngut, Elisabeth Krause, Bomee Lee, Carey Lisse, Daniel Masters, Philip Mauskopf, Gary Melnick, Hiromasa Miyasaka, Hooshang Nayyeri, Hien Nguyen, Karin Öberg, Steve Padin, Roberta Paladini, Milad Pourrahmani, Jeonghyun Pyo, Roger Smith, Yong-Seong Song, Teresa Symons, Harry Teplitz, Volker Tolls, Steve Unwin, Rogier Windhorst, Yujin Yang, Michael Zemcov

Proceedings Volume 11443, 114430I (2020) https://doi.org/10.1117/12.2567224

KEYWORDS: Galactic astronomy, Telescopes, Astrophysics, Spectral resolution, Absorption, Stars, Spectroscopes, Detector arrays, Beam splitters, Optical filters

Read Abstract +

Proceedings Article | 6 July 2018 Presentation + Paper

SPHEREx: an all-sky NIR spectral survey

Phillip Korngut, James Bock, Rachel Akeson, Matthew Ashby, Lindsey Bleem, Justin Boland, Douglas Bolton, Samuel Bradford, David Braun, Sean Bryan, Peter Capak, Tzu-Ching Chang, Andrew Coffey, Asantha Cooray, Brendan Crill, Olivier Doré, Tim Eifler, Chang Feng, Salman Habib, Katrin Heitmann, Shoubaneh Hemmati, Christopher Hirata, Woong-Seob Jeong, Minjin Kim, Davy Kirkpatrick, Theresa Kowalkowski, Elisabeth Krause, Carey Lisse, Philip Mauskopf, Daniel Masters, James McGuire, Gary Melnick, Hein Nguyen, Hooshang Nayyeri, Karin Oberg, Roland dePutter, William Purcell, Jennifer Rocca, Marcus Runyan, Karin Sandstrom, Roger Smith, Yong-Seon Song, Nathaniel Stickley, Jeremy Stober, Sara Susca, Harry Teplitz, Volker Tolls, Stephen Unwin, Michael Werner, Rogier Windhorst, Michael Zemcov

Proceedings Volume 10698, 106981U (2018) https://doi.org/10.1117/12.2312860

KEYWORDS: Staring arrays, Prototyping, Sensors, Space operations, Space telescopes, Telescopes, Galactic astronomy, Mirrors, Near infrared, Astronomy

Read Abstract +

SPHEREx, a mission in NASA’s Medium Explorer (MIDEX) program recently selected for Phase-A implementation, is an all-sky survey satellite that will produce a near-infrared spectrum for every 6 arcsecond pixel on the sky. SPHEREx has a simple, high-heritage design with large optical throughput to maximize spectral mapping speed. While the legacy data products will provide a rich archive of spectra for the entire astronomical community to mine, the instrument is optimized for three specific scientific goals: to probe inflation through the imprint primordial non-Gaussianity left on today’s large-scale cosmological structure; to survey the Galactic plane for water and other biogenic ices through absorption line studies; and to constrain the history of galaxy formation through power spectra of background fluctuations as measured in deep regions near the ecliptic poles. The aluminum telescope consists of a heavily baffled, wide-field off-axis reflective triplet design. The focal plane is imaged simultaneously by two mosaics of H2RG detector arrays separated by a dichroic beamsplitter. SPHEREx assembles spectra through the use of mass and volume efficient linear variable filters (LVFs) included in the focal plane assemblies, eliminating the need for any dispersive or moving elements. Instead, spectra are constructed through a series of small steps in the spacecraft attitude across the sky, modulating the location of an object within the FOV and varying the observation wavelength in each exposure. The spectra will cover the wavelength range between 0.75 and 5.0 µm at spectral resolutions ranging between R=35 and R=130. The entire telescope is cooled passively by a series of three V-groove radiators below 80K. An additional stage of radiative cooling is included to reduce the long wavelength focal plane temperature below 60K, controlling the dark current. As a whole, SPHEREx requires no new technologies and carries large technical and resource margins on every aspect of the design.

Proceedings Article | 21 September 2012 Paper

The IRAC point response function in the warm Spitzer mission

Joseph Hora, Massimo Marengo, Rebecca Park, Denise Wood, William Hoffmann, Patrick Lowrance, Sean Carey, Jason Surace, Jessica Krick, William Glaccum, James Ingalls, Seppo Laine, Giovanni Fazio, Matthew Ashby, Zhong Wang

Proceedings Volume 8442, 844239 (2012) https://doi.org/10.1117/12.926894

KEYWORDS: Stars, Cryogenics, Space telescopes, Point spread functions, Sensors, Telescopes, Infrared cameras, Photometry, Infrared telescopes, Diffraction

Read Abstract +

Proceedings Article | 5 August 2010 Paper

Calibration and data quality of warm IRAC

S. Carey, J. Surace, W. Glaccum, J. Ingalls, J. Krick, M. Lacy, P. Lowrance, S. Laine, J. O'Linger, J. Stauffer, S. Willner, J. Hora, W. Hoffmann, M. L. N. Ashby, J.-S. Huang, M. Marengo, M. Pahre, Z. Wang, M. Werner, G. Fazio

Proceedings Volume 7731, 77310N (2010) https://doi.org/10.1117/12.857788

KEYWORDS: Cryogenics, Calibration, Photometry, Infrared telescopes, Space telescopes, Stars, Sensors, Signal to noise ratio, Exoplanets, Multiplexers

Read Abstract +

Proceedings Article | 12 October 2004 Paper

In-flight performance and calibration of the Infrared Array Camera (IRAC) for the Spitzer Space Telescope

Joseph Hora, Giovanni Fazio, Lori Allen, Matthew Ashby, Pauline Barmby, Lynne Deutsch, Jiasheng Huang, Massimo Marengo, S. Megeath, Gary Melnick, Michael Pahre, Brian Patten, Howard Smith, Zhong Wang, Steven Willner, William Hoffmann, Judith Pipher, William Forrest, Craig McMurtry, Craig McCreight, Mark McKelvey, Robert McMurray, Samuel Moseley, Richard Arendt, John Mentzell, Catherine Marx, Dale Fixsen, Eric Tollestrup, Peter Eisenhardt, Daniel Stern, Varoujan Gorjian, Bidushi Bhattacharya, Sean Carey, William Glaccum, Mark Lacy, Patrick Lowrance, Seppo Laine, Brant Nelson, William Reach, John Stauffer, Jason Surace, Gillian Wilson, Edward Wright

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550744

KEYWORDS: Stars, Calibration, Light scattering, Sensors, Stray light, Infrared telescopes, Point spread functions, Cameras, Space telescopes, Infrared cameras

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Observing with the infrared array camera (IRAC) on the Spitzer Space Telescope

Sean Carey, Mark Lacy, Seppo Laine, William Reach, Jason Surace, William Glaccum, Joseph Hora, Steven Willner, Richard Arendt, Matthew Ashby, Lori Allen, Pauline Barmby, Bidushi Bhattacharya, Lynne Deutsch, Peter Eisenhardt, William Hoffmann, Jiasheng Huang, Patrick Lowrance, Massimo Marengo, S. Thomas Megeath, Brant Nelson, Michael Pahre, Brian Patten, Judith Pipher, John Stauffer, Daniel Stern, Zhong Wang, Gillian Wilson, Giovanni Fazio

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550968

KEYWORDS: Calibration, Infrared telescopes, High dynamic range imaging, Space telescopes, Stray light, Infrared cameras, Stars, Infrared radiation, Space operations, Telescopes

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Comparison of laboratory and in-flight performance of infared array camera (IRAC) detector arrays on Spitzer Space Telescope

Judith Pipher, Craig McMurtry, William Forrest, Craig McCreight, Mark McKelvey, Robert McMurray, Roy Johnson, Giovanni Fazio, Joseph Hora, Lori Allen, Matthew Ashby, Pauline Barmby, Lynne Deutsch, Jiasheng Huang, Massimo Marengo, S. Thomas Megeath, Michael Pahre, Brian Patten, Zhong Wang, Steven Willner, William Hoffmann, Samuel Moseley, Richard Arendt, Danny Krebs, Peter Eisenhardt, Daniel Stern, Varoujan Gorjian, Bidushi Bhattacharya, William Glaccum, Mark Lacy, Patrick Lowrance, Sean Carey, Seppo Laine, John Stauffer, Jason Surace, William Reach, Gillian Wilson

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551599

KEYWORDS: Sensors, Multiplexers, Detector arrays, Quantum efficiency, Space telescopes, Cameras, Infrared telescopes, Infrared cameras, Calibration, Infrared radiation

Read Abstract +

Proceedings Article | 16 September 2004 Paper

SIP: a modern flexible data pipeline

Pauline Barmby, Zhong Wang, Massimo Marengo, Matthew Ashby

Proceedings Volume 5493, (2004) https://doi.org/10.1117/12.550468

KEYWORDS: Calibration, Data processing, Image processing, Databases, Space operations, Space telescopes, Infrared cameras, Data centers, Infrared telescopes, Data acquisition

Read Abstract +

Proceedings Article | 5 March 2003 Paper

Performance of the infrared array camera (IRAC) for SIRTF during instrument integration and test

Joseph Hora, Giovanni Fazio, Lori Allen, Matthew Ashby, Pauline Barmby, Lynne Deutsch, Jiasheng Huang, S. Thomas Megeath, Michael Pahre, Brian Patten, Zhong Wang, Steven Willner, William Hoffmann, J. Eric Mentzell, Peter Eisenhardt, Daniel Stern, Varoujan Gorjian, William Glaccum, Mark Lacy, Sean Carey, Jason Surace, William Reach, Judith Pipher, William Forrest, Craig McCreight

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461791

KEYWORDS: Calibration, Camera shutters, Lamps, Short wave infrared radiation, Sensors, Optical testing, Telescopes, Cameras, Infrared telescopes, Infrared cameras

Read Abstract +

Proceedings Article | 5 March 2003 Paper

A realistic science data simulator for the IRAC camera on SIRTF

Matthew Ashby, Jason Surace, Joseph Hora

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461786

KEYWORDS: Device simulation, Sensors, Infrared telescopes, Infrared radiation, Space operations, Cameras, Software development, Calibration, Point spread functions, Infrared cameras

Read Abstract +

Proceedings Article | 16 November 2000 Paper

Calibration and performance of the infrared array camera (IRAC)

Joseph Hora, Giovanni Fazio, Steven Willner, Michael Ashby, Jiasheng Huang, S. Thomas Megeath, John Stauffer, Eric Tollestrup, Zhong Wang, William Glaccum, Judith Pipher, William Forrest, Craig McCreight, Mark McKelvey, William Hoffman, Peter Eisenhardt, Jason Surace, William Reach, Samuel Moseley, Richard Arendt, Kenneth Stewart, F. David Robinson

Proceedings Volume 4131, (2000) https://doi.org/10.1117/12.406553

KEYWORDS: Calibration, Sensors, Black bodies, Cameras, Telescopes, Infrared cameras, Camera shutters, Point spread functions, Infrared radiation, Infrared telescopes

Read Abstract +

Proceedings Article | 21 August 1998 Paper

Infrared array camera (IRAC) for the Space Infrared Telescope Facility (SIRTF)

Giovanni Fazio, Joseph Hora, Steven Willner, John Stauffer, Michael Ashby, Zhong Wang, Eric Tollestrup, Judith Pipher, William Forrest, Craig McCreight, Samuel Moseley, William Hoffmann, Peter Eisenhardt, Edward Wright

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317225

KEYWORDS: Galactic astronomy, Infrared telescopes, Cameras, Infrared cameras, Sensors, Calibration, Space telescopes, Infrared radiation, Detector arrays, Stars

Read Abstract +

Showing 5 of 13 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years