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You searched on: Author: Keith Lykke

Displaying records 1 to 10 of 114 records.
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1. SI-Traceable Calibrations of Celestial Objects
Published: 5/14/2015
Authors: Keith R Lykke, Claire Elizabeth Cramer, John Taylor Woodward IV
Abstract: Photometric calibration is currently the leading source of systematic uncertainty in supernova surveys that aim to determine the nature of dark energy. The bulk of this uncertainty is due to imperfect knowledge of the spectral energy distribution ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911741

2. The Cosmic Infrared Background Experiment (CIBER): The Low Resolution Spectrometer
Published: 5/14/2015
Authors: K. Tsumura, T. Aria, J. Battle, J. Bock, Steven W Brown, A. Cooray, V. Hristov, B. Keating, M. G. Kim, D. H. Lee, L. R. Levenson, Keith R Lykke, P. Mason, T. Matsumoto, S. Matsuura, K. Murata, U. W. Nam, T. Renbarger, Allan W. Smith, I. Sullivan, K. Suzuki, T. Wada, M. Zemcov, U. W. Nam, B. Shultz, I. Sullivan, P. M. Korngut
Abstract: Absolute spectrophotometric measurements of diffuse radiation at 1−2 μm are crucial to our understanding of the radiative content of the Universe from nucleosynthesis since the epoch of reionization, the composition and structure of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910002

3. Precise Measurement of Lunar Spectral Irradiance at Visible Wavelengths
Series: Journal of Research (NIST JRES)
Report Number: 118.020
Published: 11/12/2013
Authors: Keith R Lykke, John Taylor Woodward IV, Allan W. Smith, Claire Elizabeth Cramer
Abstract: We report a measurement of lunar spectral irradiance with an uncertainty below 1 % from 420 nm to 1000 nm. This measurement uncertainty meets the stability requirement for many climate data records derived from satellite images, including tho ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913841

4. Using a Tunable Ultraviolet Laser for the Inactivation of Water Pathogens
Published: 9/22/2013
Authors: Thomas C Larason, Keith R Lykke, Ping-Shine Shaw, Lin Chungsan
Abstract: Ultraviolet (UV) radiation effectively inactivates common pathogens found in ground and surface waters such as Cryptosporidium, Giardia, and most bacterial pathogens (e.g. E. coli). Water treatment facilities are now using UV radiation for disinfect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914548

5. A novel apparatus to measure reflected sunlight from the Moon
Published: 9/19/2013
Authors: Claire Elizabeth Cramer, Gerald T Fraser, Keith R Lykke, John Taylor Woodward IV, Alan W. Smith
Abstract: We describe a new apparatus for measuring the spectral irradiance of the Moon at visible wavelengths. Our effort builds upon the United States Geological Survey‰s highly successful Robotic Lunar Observatory (ROLO), which determined a precise model fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914538

6. New Instruments to Calibrate Atmospheric Transmission
Published: 9/17/2012
Authors: Claire Elizabeth Cramer, Keith R Lykke, John Taylor Woodward IV, Peter Zimmer, John T McGraw, Daniel C Zirzow
Abstract: Changing atmospheric transmission accounts for the largest systematic errors limiting photometric measurement precision and accuracy for ground-based telescopes. While considerable resources have been devoted to correcting the effects of the atmo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913048

7. Near-field Calibration of an Objective Spectrophotometer to NIST Radiometric Standards for the Creation and Maintenance of Standard Stars for Ground- and Space-Based Applications
Published: 9/13/2012
Authors: John Taylor Woodward IV, Keith R Lykke, Claire Elizabeth Cramer, John T McGraw, Peter Zimmer, Daniel C Zirzow, Susana Deustua, Dean Hines
Abstract: NIST-calibrated detectors will be used by the ground-based 100mm diameter Astronomical Extinction Spectrophotometer (AESoP) to calibrate the spectral energy distributions of bright stars to sub-1% per 1nm spectral resolution element accuracy. AESo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913049

8. Tunable Laser Techniques for Improving the Precision of Optical Astronomy
Published: 9/13/2012
Authors: Keith R Lykke, Claire Elizabeth Cramer, John Taylor Woodward IV, Steven W Brown, Ping-Shine Shaw
Abstract: Improving the precision of optical astronomy requires not only new telescopes and instrumentation, but also advances in observing protocols, calibrations and data analysis. The Laser Applications Group at the National Institute of Standards and Techn ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911767

9. Stray light correction algorithm for multi-spectral hyperspectral spectrographs
Published: 6/1/2012
Authors: Michael Feinholz, Stephanie J Flora, Steven W Brown, Yuqin Zong, Keith R Lykke, Mark A. Yarbrough, Bettye C Johnson, D. K. Clark
Abstract: An algorithm is developed to correct a multi-channel fiber-coupled spectrograph for stray or scattered light within the system. The efficacy of the algorithm is evaluated based on a series of validation measurements of sources with different spectra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909987

10. The Pan-STARRS1 Photometric System
Published: 5/10/2012
Authors: J. L. Tonry, Christopher W Stubbs, Keith R Lykke, Peter Doherty, I. S. Shivvers, W. S. Burgett, K. C. Chambers, K. W Hodapp, N. Kaiser, R -P Kudritzki, E. A. Magnier, J. S, Morgan, P. A. Price, R. J. Wainscoat
Abstract: The Pan-STARRS1 survey is collecting multi-epoch, multi-color observations of the sky north of declination −30 to unprecedented depths. These data are being photometrically and astrometrically calibrated and will serve as a reference for man ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910780



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