Dr. Steven M. Crawford Profile

Dr. Steven M. Crawford

at Space Telescope Science Institute

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

SALT and SAAO strategy, focusing on the time-domain: process, plans, and challenges

Petri Väisänen, Lisa Crause, David Gilbank, David Buckley, Chris Coetzee, Steven Crawford, Stephen Potter, Retha Pretorius, Encarni Romero Colmenero, Ramotholo Sefako, Michael Shara, Amanda Sickafoose, Theodore Williams

Proceedings Volume 10704, 107040A (2018) https://doi.org/10.1117/12.2313272

KEYWORDS: Telescopes, Galactic astronomy, Astronomy, Spectrographs, Observatories, Stars, Exoplanets, Large telescopes, Spherical lenses, Spectral resolution, Software development

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Mini-tracker concepts for the SALT transient follow-up program

John Booth, Michael Shara, Steven Crawford, Lisa Crause

Proceedings Volume 10700, 107000S (2018) https://doi.org/10.1117/12.2311909

KEYWORDS: Telescopes, Mirrors, Spectrographs, Large telescopes, Spectroscopy, Large Synoptic Survey Telescope, Optical spheres

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Proceedings Article | 10 July 2018 Paper

Paper

Astronomy operations with the Southern African Large Telescope (SALT): SALT is doing great!

Encarni Romero-Colmenero, Petri Väisänen, Ted Williams, Chris Coetzee, Steven Crawford, Christian Hettlage, Rosalind Skelton, Rudolph Kuhn, Brent Miszalski, Alexei Kniazev, Marissa Kotze, Éric Depagne, Thea Koen, Veronica Van Wyk, Fred Marang, Anja Schroeder, Nhlavutelo Macebele, Anelisiwe Mayekiso

Proceedings Volume 10704, 107040O (2018) https://doi.org/10.1117/12.2313881

KEYWORDS: Astronomy, Telescopes, Imaging spectroscopy, Observatories, Large telescopes, Spectrographs, Software development

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Proceedings Article | 10 July 2018 Paper

Paper

Preparing SALT's software for the future

Christian Hettlage, Encarnacion Romero Colmenero, Steven Crawford, Nhlavutelo Macebele, Anelisiwe Mayekiso, Rosalind Skelton, Rudolf Kuhn, Petri Väisänen, Janus Brink, Anthony Koeslag, Stephen Hulme

Proceedings Volume 10704, 107042D (2018) https://doi.org/10.1117/12.2313834

KEYWORDS: Databases, Telescopes, Software development, Astronomy, Observatories

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Proceedings Article | 6 July 2018 Paper

Paper

Commissioning the SALT High Resolution Spectrograph’s iodine cell

Lisa Crause, R. Paul Butler, Gillian Nave, Rudi Kuhn, Blaine Lomberg, Alexei Kniazev, Steven Crawford, Éric Depagne

Proceedings Volume 10702, 107025S (2018) https://doi.org/10.1117/12.2307195

KEYWORDS: Iodine cells, Iodine, Spectrographs, Stars, Point spread functions, Fourier transforms, Calibration, Crystals, Telescopes, Absorption

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Proceedings Article | 9 August 2016 Paper

Paper

Data reductions and data quality for the high resolution spectrograph on the Southern African Large Telescope

S. Crawford, Lisa Crause, Éric Depagne, Krystian Ilkiewicz, Anja Schroeder, Rudolph Kuhn, Christian Hettlage, Encarni Romero Colmenaro, Alexei Kniazev, Petri Väisänen

Proceedings Volume 9908, 99082L (2016) https://doi.org/10.1117/12.2232653

KEYWORDS: Spectrographs, Large telescopes, Calibration, Charge-coupled devices, Lawrencium, Astronomy, Stars, Observatories, Absorption, Databases

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Proceedings Article | 9 August 2016 Paper

Paper

Commissioning the polarimetric modes of the Robert Stobie spectrograph on the Southern African Large Telescope

S. Potter, Ken Nordsieck, Encarni Romero-Colmenero, Steve Crawford, Petri Vaisanen, Éric Depagne, David Buckley, Anthony Koeslag, Janus Brink, Christian Hetlage, Keith Browne, Lisa Crause, Alan Schier, James Allington

Proceedings Volume 9908, 99082K (2016) https://doi.org/10.1117/12.2232391

KEYWORDS: Polarimetry, Beam splitters, Calcite, Spectrographs, Large telescopes, Received signal strength, Imaging spectroscopy, Polarimetry, Spectrographs, Polarization, Prisms, Stars

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Proceedings Article | 22 July 2016 Paper

Paper

Polarization dOTF: on-sky focal plane wavefront sensing

Keira Brooks, Laure Catala, Matthew Kenworthy, Steven Crawford, Johanan Codona

Proceedings Volume 9912, 991203 (2016) https://doi.org/10.1117/12.2232722

KEYWORDS: Optical transfer functions, Telescopes, Wavefront sensors, Polarization, Point spread functions, Cameras, Wavefronts, Sensors, Observatories, Stars

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Proceedings Article | 15 July 2016 Paper

Paper

Worth its SALT: four years of full science operations with the Southern African Large Telescope

Petri Väisänen, Chris Coetzee, Anja Schroeder, Steve Crawford, David Buckley, Janus Brink, Éric Depagne, Alexei Kniazev, Thea Koen, Paul Kotze, Fred Marang, Brent Miszalski, Encarni Romero Colmenero, Ockert Strydom, Veronica Van Wyk, Theodore Williams

Proceedings Volume 9910, 99100T (2016) https://doi.org/10.1117/12.2232873

KEYWORDS: Observatories, Large telescopes, Telescopes, Gemini Observatory, Mirrors, Coating, Adaptive optics, Gemini Planet Imager, Turbulence, Structural engineering

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Proceedings Article | 15 July 2016 Paper

Paper

Improving SALT productivity by using the theory of constraints

Johannes Coetzee, Petri Väisänen, Darragh O'Donoghue, Paul Kotze, Encarni Romero Colmenero, Brent Miszalski, Steven Crawford, Alexei Kniazev, Éric Depagne, Paul Rabe, Christian Hettlage

Proceedings Volume 9910, 991004 (2016) https://doi.org/10.1117/12.2231376

KEYWORDS: Telescopes, Large telescopes, Astronomy, Mirrors, Observatories, Clouds, Visibility, Spectrographs, Resistance, Databases

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Proceedings Article | 11 July 2016 Paper

Paper

Monitoring the performance of the Southern African Large Telescope

Christian Hettlage, Chris Coetzee, Petri Väisänen, Encarni Romero Colmenero, Steven Crawford, Paul Kotze, Paul Rabe, Stephen Hulme, Janus Brink, Deneys Maartens, Keith Browne, Ockert Strydom, David De Bruyn

Proceedings Volume 9910, 99102M (2016) https://doi.org/10.1117/12.2230484

KEYWORDS: Telescopes, Large telescopes, Astronomical telescopes, Efficient operations, Automatic tracking

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Proceedings Article | 4 August 2014 Open Access

Open Access

Paper

The first SPIE software Hack Day

S. Kendrew, C. Deen, N. Radziwill, S. Crawford, J. Gilbert, M. Gully-Santiago, P. Kubánek

Proceedings Volume 9152, 915202 (2014) https://doi.org/10.1117/12.2075357

KEYWORDS: Astronomy, Observatories, Visualization, Telescopes, Databases, Astronomical telescopes, Stellar astronomy, Physics, Roads, Software development

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Proceedings Article | 28 July 2014 Paper

Paper

Tracking progress: monitoring observing statistics and telescope usage at the Southern African Large telescope

Steven Crawford, Anthony Koeslag, Encarni Romero Colmenero, David Buckley, Thea Koen, Fred Marang, Veronica Van Wyk, Samantha Bennett

Proceedings Volume 9149, 914909 (2014) https://doi.org/10.1117/12.2057369

KEYWORDS: Telescopes, Observatories, Large telescopes, Received signal strength, Astronomy, Fabry–Perot interferometers, Image quality, Optical instrument design, Spectrographs, Imaging spectroscopy

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Proceedings Article | 24 July 2014 Paper

Paper

Performance of the Southern African Large Telescope (SALT) High Resolution Spectrograph (HRS)

Lisa Crause, Ray Sharples, David Bramall, Jürgen Schmoll, Paul Clark, Eddy Younger, Luke Tyas, Sean Ryan, Janus Brink, Ockert Strydom, David Buckley, Martin Wilkinson, Steven Crawford, Éric Depagne

Proceedings Volume 9147, 91476T (2014) https://doi.org/10.1117/12.2055635

KEYWORDS: Spectrographs, Stars, Spectral resolution, Mirrors, Calibration, Telescopes, Iodine cells, Large telescopes, Lawrencium, Cameras

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Proceedings Article | 27 September 2012 Paper

Paper

Overview of Site Monitoring at the SAAO

T. Pickering, S. Crawford, L. Catala, D. Buckley, A. Ziad, R. Wilson

Proceedings Volume 8444, 84446A (2012) https://doi.org/10.1117/12.927079

KEYWORDS: Telescopes, Astronomy, Observatories, Atmospheric monitoring, Global system for mobile communications, Atmospheric turbulence, Large telescopes, Adaptive optics, Infrared telescopes, Reliability

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Proceedings Article | 17 September 2012 Paper

Paper

SALT's transition to science operations

David A. Buckley, J. Coetzee, Steven Crawford, Kenneth Nordsieck, Darragh O'Donoghue, Theodore Williams

Proceedings Volume 8444, 84442W (2012) https://doi.org/10.1117/12.928776

KEYWORDS: Telescopes, Received signal strength, Mirrors, Image quality, Calibration, Sensors, Astronomy, Astronomical telescopes, Control systems, Visibility

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Proceedings Article | 13 September 2012 Paper

Paper

Dimensioning and performances of an AO system for the SALT

L. Catala, M. Carbillet, L. Jolissaint, D. Buckley, S. Crawford, T. Pickering

Proceedings Volume 8447, 84473W (2012) https://doi.org/10.1117/12.926591

KEYWORDS: Adaptive optics, Imaging systems, Stars, Telescopes, Imaging spectroscopy, Received signal strength, Spectroscopy, Actuators, Observatories, Wavefronts

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Proceedings Article | 30 July 2010 Paper

Paper

PySALT: the SALT science pipeline

Steven Crawford, Martin Still, Pim Schellart, Luis Balona, David A. Buckley, Garith Dugmore, Amanda A. Gulbis, Alexei Kniazev, Marissa Kotze, Nicola Loaring, Kenneth Nordsieck, Timothy Pickering, Stephen Potter, Encarni Romero Colmenero, Petri Vaisanen, Theodore Williams, Ewald Zietsman

Proceedings Volume 7737, 773725 (2010) https://doi.org/10.1117/12.857000

KEYWORDS: Telescopes, Imaging spectroscopy, Received signal strength, Fabry–Perot interferometers, Data archive systems, Spectroscopy, Software development, Photometry, Spectrographs, Polarimetry

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Proceedings Article | 21 July 2010 Paper

Paper

Time resolved astronomy with the SALT

D. A. Buckley, S. Crawford, A. A. Gulbis, J. McPhate, K. Nordsieck, S. Potter, D. O'Donoghue, O. H. Siegmund, P. Schellart, M. Spark, B. Welsh, E. Zietsman

Proceedings Volume 7735, 773559 (2010) https://doi.org/10.1117/12.858039

KEYWORDS: Stars, Telescopes, Astronomy, Charge-coupled devices, Sensors, X-rays, Cameras, Magnetism, Photometry, Photon counting

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Proceedings Article | 25 July 2008 Paper

Paper

Commissioning of the Southern African Large Telescopes (SALT) first-generation instruments

D. A. Buckley, S. Barnes, E. Burgh, S. Crawford, P. Cottrell, A. Kniazev, K. Nordsieck, D. O'Donoghue, N. Rangwala, R. Zánmar Sánchez, R. Sharples, A. Sheinis, P. Väisänen, T. Williams

Proceedings Volume 7014, 701407 (2008) https://doi.org/10.1117/12.789438

KEYWORDS: Received signal strength, Cameras, Telescopes, Fabry–Perot interferometers, Spectrographs, Coating, Imaging spectroscopy, Charge-coupled devices, Galactic astronomy, Collimators

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Proceedings Article | 23 July 2008 Paper

Paper

The image quality of the Southern African Large Telescope (SALT)

Darragh O'Donoghue, Eli Atad-Ettedgui, Luis Balona, Bruce Bigelow, John Booth, Lucian Botha, Janus Brink, David Buckley, Phil Charles, Alrin Christians, J. Christopher Clemens, Lisa Crause, Steven Crawford, Geoffrey Evans, Hitesh Gajjar, Yas Hashimoto, Malcolm Hendricks, Alexei Kniazev, Anthony Koeslag, Willie Koorts, Herman Kriel, Nicola Loaring, Jonathan Love, Fred Marang, Douglas Metcalfe, Brennan Meyer, James O'Connor, Charl du Plessis, Lawrence Ramsey, Encarni Romero-Colmenero, Craig Sass, Johann Scholtz, Ramotholo Sefako, Sandisa Siyengo, Martin Still, Ockert Strydom, Arkadiusz Swat, Johann Du Toit, Petri Vaisanen, Martyn Wells, Hannah Worters

Proceedings Volume 7018, 701813 (2008) https://doi.org/10.1117/12.788841

KEYWORDS: Mirrors, Telescopes, Monochromatic aberrations, Image quality, Cameras, Simulation of CCA and DLA aggregates, Image segmentation, Wavefront sensors, Wavefronts, Interfaces

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Proceedings Article | 10 July 2008 Paper

Paper

The use of primary mirrors as Hartmann masks for in situ alignment of segmented mirror telescopes

Steven Crawford, Martyn Wells, Hitesh Gajjar

Proceedings Volume 7012, 70123P (2008) https://doi.org/10.1117/12.788840

KEYWORDS: Image segmentation, Mirrors, Telescopes, Optical alignment, Monochromatic aberrations, Image quality, Large telescopes, Cameras, Imaging systems, Data modeling

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Proceedings Article | 9 July 2008 Paper

Paper

WIYN bench upgrade: a revitalized spectrograph

M. Bershady, S. Barden, P.-A. Blanche, D. Blanco, C. Corson, S. Crawford, J. Glaspey, S. Habraken, G. Jacoby, J. Keyes, P. Knezek, P. Lemaire, M. Liang, E. McDougall, G. Poczulp, D. Sawyer, K. Westfall, D. Willmarth

Proceedings Volume 7014, 70140H (2008) https://doi.org/10.1117/12.789112

KEYWORDS: Collimators, Spectrographs, Cameras, Charge-coupled devices, Diffraction gratings, Spectral resolution, Telescopes, Quantum efficiency, Imaging systems, Image quality

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Showing 5 of 23 publications

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