Dr. Seppo J. Laine Profile

Dr. Seppo J. Laine

Research Scientist at Spitzer Science Ctr

SPIE Involvement:

Author

Publications (18)

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 | 24 July 2018 Paper

Spitzer/IRAC precision photometry: a machine learning approach

James Ingalls, Jessica Krick, Jonathan Fraine, Sean Carey, Carl Grillmair, Seppo Laine, Patrick Lowrance, William Glaccum

Proceedings Volume 10698, 106985E (2018) https://doi.org/10.1117/12.2313640

KEYWORDS: Calibration, Machine learning, Data modeling, Photometry, Instrument modeling, Exoplanets, Statistical analysis, Stars, Space telescopes, Statistical modeling

Read Abstract +

The largest source of noise in exoplanet and brown dwarf photometric time series made with Spitzer/IRAC is the coupling between intra-pixel gain variations and spacecraft pointing fluctuations. Observers typically correct for this systematic in science data by deriving an instrumental noise model simultaneously with the astrophysical light curve and removing the noise model. Such techniques for self-calibrating Spitzer photometric datasets have been extremely successful, and in many cases enabled near-photon-limited precision on exoplanet transit and eclipse depths. Self-calibration, however, can suffer from certain limitations: (1) temporal astrophysical signals can become aliased as part of the instrument model; (2) for some techniques adequate model estimation often requires a high degree of intra-pixel positional redundancy (multiple samples with nearby centroids) over long time spans; (3) many techniques do not account for sporadic high frequency telescope vibrations that smear out the point spread function. We have begun to build independent general-purpose intra-pixel systematics removal algorithms using three machine learning techniques: K-Nearest Neighbors (with kernel regression), Random Decision Forests, and Artificial Neural Networks. These methods remove many of the limitations of self-calibration: (1) they operate on a dedicated calibration database of approximately one million measurements per IRAC waveband (3.6 and 4.5 microns) of non-variable stars, and thus are independent of the time series science data to be corrected; (2) the database covers a large area of the "Sweet Spot, so the methods do not require positional redundancy in the science data; (3) machine learning techniques in general allow for flexibility in training with multiple, sometimes unorthodox, variables, including those that trace PSF smear. We focus in this report on the K-Nearest Neighbors with Kernel Regression technique. (Additional communications are in preparation describing Decision Forests and Neural Networks.)

Proceedings Article | 10 July 2018 Presentation + Paper

Patrick Lowrance, Jessica Krick, Jim Ingalls, Sean Carey, William Glaccum, Carl Grillmair, Joseph Hora, Seppo Laine

Proceedings Volume 10704, 1070427 (2018) https://doi.org/10.1117/12.2313953

KEYWORDS: Calibration, Space operations, Astronomy, Space telescopes, Solar processes, Photometry, Telescopes, Infrared radiation

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Correcting distortions in the infrared array camera during the cryogenic mission of the Spitzer Space Telescope

Carl Grillmair, Patrick Lowrance, Sean Carey, Seppo Laine, Jessica Krick, William Glaccum, James Ingalls, Schuyler Van Dyk, Roberta Paladini, John Stauffer, David Shupe

Proceedings Volume 10698, 106985D (2018) https://doi.org/10.1117/12.2313706

KEYWORDS: Infrared telescopes, Infrared cameras, Space telescopes, Cameras, Infrared imaging

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Using the Spitzer IRAC science archive for instrument trending

Jessica Krick, Jim Ingalls, Patrick Lowrance, Sean Carey, William Glaccum, Carl Grillmair, Seppo Laine, Jessie Christiansen

Proceedings Volume 10698, 106985Y (2018) https://doi.org/10.1117/12.2310185

KEYWORDS: Exoplanets, Telescopes, Databases, Clouds, Stars, Photometry, Atmospheric sciences, Space telescopes, Calibration, Data archive systems

Read Abstract +

Proceedings Article | 15 July 2016 Paper

Ongoing evolution of proposal reviews in the Spitzer warm mission

Lisa Storrie-Lombardi, Nancy Silbermann, L. Rebull, John Stauffer, Megan Crane, Seppo Laine, Suzanne Dodd, Lee Armus

Proceedings Volume 9910, 991012 (2016) https://doi.org/10.1117/12.2231788

KEYWORDS: Observatories, Gemini Observatory, Fourier transforms, Databases, Head, Telescopes, Software development, Transparency, Visibility, Radium

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Absolute photometric calibration of IRAC: lessons learned using nine years of flight data

D. Cole, J. Surace, S. Laine, C. Engelke, K. Gordon, S. Carey, W. Glaccum, P. Lowrance, J. Ingalls, J. Hora, R. Bohlin, J. Krick, S. Price

Proceedings Volume 8442, 84421Z (2012) https://doi.org/10.1117/12.927183

KEYWORDS: Calibration, Stars, Photometry, Cryogenics, Space telescopes, Infrared telescopes, Data modeling, Data centers, Infrared cameras, Infrared radiation

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Modifications to the warm Spitzer data reduction pipeline

James Ingalls, Seppo Laine, Jason Surace, Patrick Lowrance, Iffat Khan, Carl Grillmair, Jessica Krick, William Glaccum, Sean Carey

Proceedings Volume 8442, 844238 (2012) https://doi.org/10.1117/12.926944

KEYWORDS: Cryogenics, Calibration, Infrared telescopes, Space telescopes, Stars, Infrared cameras, Infrared imaging, Infrared radiation, Telescopes, Sensors

Read Abstract +

Proceedings Article | 21 September 2012 Paper

The IRAC point response function in the warm Spitzer mission

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

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 | 21 September 2012 Paper

Intra-pixel gain variations and high-precision photometry with the Infrared Array Camera (IRAC)

Sean Carey, Jason Surace, Carl Grillmair, James Ingalls, Seppo Laine, William Glaccum, Jessica Krick, Patrick Lowrance

Proceedings Volume 8442, 84421Y (2012) https://doi.org/10.1117/12.926947

KEYWORDS: Calibration, Stars, Photometry, Infrared cameras, Infrared telescopes, Infrared radiation, Interference (communication), Space telescopes, Exoplanets, Planetary systems

Read Abstract +

Proceedings Article | 13 September 2012 Paper

Pointing effects and their consequences for Spitzer IRAC exoplanet observations

Patrick Lowrance, Seppo Laine, Ryan Olds, William Glaccum, James Ingalls, Jessica Krick, Sean Carey, John Stauffer, Jason Surace, Mark Fisher, Carl Grillmair

Proceedings Volume 8448, 84481I (2012) https://doi.org/10.1117/12.927191

KEYWORDS: Space telescopes, Exoplanets, Telescopes, Space operations, Stars, Sensors, Photometry, Phase measurement, Aberration correction, Calibration

Read Abstract +

Proceedings Article | 5 August 2010 Paper

Calibration and data quality of warm IRAC

M. Pahre, J. O'Linger, J. Krick, M. Werner, S. Willner, Z. Wang, J.-S. Huang, J. Ingalls, M. Lacy, J. Hora, W. Glaccum, M. L. N. Ashby, S. Laine, P. Lowrance, J. Surace, M. Marengo, S. Carey, W. Hoffmann, J. Stauffer, 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 July 2008 Paper

Proposal review rankings: the influence of reviewer discussions on proposal selection

Nancy Silbermann, Lisa Storrie-Lombardi, Seppo Laine, Luisa Rebull, Megan Crane

Proceedings Volume 7016, 701622 (2008) https://doi.org/10.1117/12.787964

KEYWORDS: Observatories, Cryogenics, Space telescopes, Telescopes, Astronomy, Solar system, Astronomical telescopes, Hubble Space Telescope, Stars, X-ray telescopes

Read Abstract +

Proceedings Article | 30 June 2006 Paper

Spitzer Space Telescope proposal process

L. Rebull, S. Laine, L. Storrie-Lombardi, N. Silbermann

Proceedings Volume 6270, 627029 (2006) https://doi.org/10.1117/12.669087

KEYWORDS: Space telescopes, Databases, Visualization, Observatories, Astronomy, Printing, Infrared cameras, Infrared imaging, Infrared spectroscopy, Internet

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

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

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 | 12 October 2004 Paper

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

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

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

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

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

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 | 29 September 1995 Paper

Sun-synchronous orbit mission for passively cooled reconnaissance of the interstellar medium

Ken Swaim, Allen Green, Richard Parmley, Timothy Hawarden, R. Greg Schunk, John Jackson, Harold Blevins, William Jones, Donald Williams, Charles Telesco, Holly Chandler, Charles Taylor, Russell Chipman, Mark Gerry, Belinda Wright, Jim McCarter, Seppo Laine, Jonathan Campbell, Terry Schmitt, John Fikes, Susan Spencer, Linda Vestal

Proceedings Volume 2553, (1995) https://doi.org/10.1117/12.221356

KEYWORDS: Space operations, Space telescopes, Telescopes, Sensors, Prisms, Sun, Mirrors, Spectroscopy, Spectrographs, Clouds

Read Abstract +

Showing 5 of 18 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