Dr. Karl W. Forster Profile

Dr. Karl W. Forster

NuSTAR Science Operations Center manager at Caltech

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Author

Publications (12)

SPIE Journal Paper | 29 September 2022 Open Access

Effective area calibration of the Nuclear Spectroscopic Telescope Array

Kristin Madsen, Karl Forster, Brian Grefenstette, Fiona Harrison, Hiromasa Miyasaka

JATIS, Vol. 8, Issue 03, 034003, (September 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.3.034003

KEYWORDS: Calibration, Sensors, Telescopes, Spectroscopy, Vignetting, Data modeling, Absorption, Platinum, Quantum efficiency, X-rays

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SPIE Journal Paper | 22 February 2022 Open Access

Reconstruction of the NuSTAR point spread function using single-laser metrology

Hannah Earnshaw, Kristin Madsen, Karl Forster, Brian Grefenstette, Murray Brightman, Andreas Zoglauer, Fiona Harrison

JATIS, Vol. 8, Issue 01, 014009, (February 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.1.014009

KEYWORDS: Point spread functions, Laser metrology, Metrology, Transform theory, Telescopes, Sensors, Space operations, X-ray telescopes, Distortion, Time metrology

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Proceedings Article | 6 July 2018 Presentation + Paper

Effective area calibration of the nuclear spectroscopic telescope array (NuSTAR)

Kristin Madsen, Walter Cook, Karl Forster, Brian Grefenstette, Fiona Harrison, Hiromasa Miyasaka, Sean Pike

Proceedings Volume 10699, 106991W (2018) https://doi.org/10.1117/12.2313675

KEYWORDS: Calibration, Sensors, Absorption, Data modeling, Spectroscopy, Telescopes, X-rays, Platinum, Mirrors

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SPIE Journal Paper | 27 October 2017 Open Access

Observational artifacts of Nuclear Spectroscopic Telescope Array: ghost rays and stray light

Kristin K. Madsen, Finn E. Christensen, William W. Craig, Karl W. Forster, Brian W. Grefenstette, Fiona A. Harrison, Hiromasa Miyasaka, Vikram Rana

JATIS, Vol. 3, Issue 04, 044003, (October 2017) https://doi.org/10.1117/12.10.1117/1.JATIS.3.4.044003

KEYWORDS: Photons, Sensors, Mirrors, Telescopes, Space telescopes, Reflection, Stray light, Spectroscopes, X-rays, Reflectivity

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Proceedings Article | 15 July 2016 Paper

Getting NuSTAR on target: predicting mast motion

Karl Forster, Kristin Madsen, Hiromasa Miyasaka, William Craig, Fiona Harrison, Vikram Rana, Craig Markwardt, Brian Grefenstette

Proceedings Volume 9910, 99100Z (2016) https://doi.org/10.1117/12.2231239

KEYWORDS: Observatories, Space telescopes, Space operations, X-ray telescopes, Telescopes, Sensors, Cryogenics, Stars, Electrophoretic light scattering, Neodymium

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Proceedings Article | 6 August 2014 Paper

NuSTAR observatory science operations: on-orbit acclimation

Karl Forster, Fiona Harrison, Suzanne Dodd, Daniel Stern, Hiromasa Miyasaka, Kristin Madsen, Brian Grefenstette, Craig Markwardt, William Craig, Francis Marshall

Proceedings Volume 9149, 91490R (2014) https://doi.org/10.1117/12.2056916

KEYWORDS: Space operations, Observatories, Sensors, System on a chip, Space telescopes, Calibration, Telescopes, Sun, X-ray telescopes, Stars

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Proceedings Article | 24 July 2014 Paper

Inflight performance and calibration of the NuSTAR CdZnTe pixel detectors

Takao Kitaguchi, Varun Bhalerao, W. Cook, Karl Forster, Brian Grefenstette, Fiona Harrison, Kristin Madsen, Peter Mao, Hiromasa Miyasaka, Vikram Rana

Proceedings Volume 9144, 91441R (2014) https://doi.org/10.1117/12.2057342

KEYWORDS: Sensors, X-rays, Calibration, X-ray detectors, X-ray telescopes, Calcium, Astronomy, Signal detection, Space telescopes, Spectral models

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Proceedings Article | 24 July 2014 Paper

The nuclear spectroscopic telescope array (NuSTAR) high-energy X-ray mission

Kristin Madsen, Fiona Harrison, Hongjun An, Steven Boggs, Finn Christensen, Rick Cook, William Craig, Karl Forster, Felix Fuerst, Brian Grefenstette, Charles Hailey, Takao Kitaguchi, Craig Markwardt, Peter Mao, Hiromasa Miyasaka, Vikram Rana, Daniel Stern, William Zhang, Andreas Zoglauer, Dominic Walton, Niels Westergaard

Proceedings Volume 9144, 91441P (2014) https://doi.org/10.1117/12.2056643

KEYWORDS: X-rays, Stars, X-ray telescopes, Space telescopes, Iron, Data modeling, Calibration, Galactic astronomy, Electroluminescent displays, Magnetism

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Proceedings Article | 29 June 2006 Paper

The challenges of GALEX

Karl Forster, Tim Conrow, David Schiminovich, Kerry Erickson, Justin McNeill, Chris Martin, Marco Morais

Proceedings Volume 6270, 627004 (2006) https://doi.org/10.1117/12.672397

KEYWORDS: Space operations, Sensors, Stars, System on a chip, Ultraviolet radiation, Spectroscopy, Galactic astronomy, Space telescopes, Imaging spectroscopy, Observatories

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Proceedings Article | 11 October 2004 Paper

The GALEX mission and detectors

Oswald Siegmund, Barry Welsh, Christopher Martin, Thomas Barlow, Luciana Bianchi, Yong-Ik Byun, Karl Forster, Peter Friedman, Patrick Jelinsky, Barry Madore, Roger Malina, Bruno Milliard, Patrick Morrissey, Susan Neff, Michael Rich, David Schiminovich, Todd Small, Alexander Szalay, Ted Wyder

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.561488

KEYWORDS: Sensors, Ultraviolet radiation, Stars, Galactic astronomy, Microchannel plates, Imaging spectroscopy, Quantum efficiency, Electronics, Spectroscopy, Telescopes

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Proceedings Article | 24 February 2003 Paper

Performance results of the GALEX cross delay line detectors

Patrick Jelinsky, Patrick Morrissey, James Malloy, Sharon Jelinsky, Oswald Siegmund, Christopher Martin, David Schiminovich, Karl Forster, Ted Wyder, Peter Friedman

Proceedings Volume 4854, (2003) https://doi.org/10.1117/12.460013

KEYWORDS: Sensors, Quantum efficiency, Microchannel plates, Calibration, Spatial resolution, Ultraviolet radiation, Astrophysics, Telescopes, Galaxy evolution, Photons

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Proceedings Article | 24 February 2003 Paper

The Galaxy Evolution Explorer

Christopher Martin, Thomas Barlow, William Barnhart, Luciana Bianchi, Brian Blakkolb, Dominique Bruno, Joseph Bushman, Yong-Ik Byun, Michael Chiville, Timothy Conrow, Brian Cooke, Jose Donas, James Fanson, Karl Forster, Peter Friedman, Robert Grange, David Griffiths, Timothy Heckman, James Lee, Patrick Jelinsky, Sug-Whan Kim, Siu-Chun Lee, Young-Wook Lee, Dankai Liu, Barry Madore, Roger Malina, Alan Mazer, Ryan McLean, Bruno Milliard, William Mitchell, Marco Morais, Patrick Morrissey, Susan Neff, Frederic Raison, David Randall, Michael Rich, David Schiminovich, Wes Schmitigal, Amit Sen, Oswald Siegmund, Todd Small, Joseph Stock, Frank Surber, Alexander Szalay, Arthur Vaughan, Timothy Weigand, Barry Welsh, Patrick Wu, Ted Wyder, C. Kevin Xu, Jennifer Zsoldas

Proceedings Volume 4854, (2003) https://doi.org/10.1117/12.460034

KEYWORDS: Sensors, Galactic astronomy, Space operations, Ultraviolet radiation, Imaging spectroscopy, Space telescopes, Telescopes, Spectroscopy, Satellites, Electronics

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Showing 5 of 12 publications

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