TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS
We present the initial results from a program aimed at establishing a network of hot DA white dwarfs to serve as spectrophotometric standards for present and future wide-field surveys. These stars span the equatorial zone and are faint enough to be conveniently observed throughout the year with larg...
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6212362016-11-05T03:00:33Z TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS Narayan, G. Axelrod, T. Holberg, J. B. Matheson, T. Saha, A. Olszewski, E. Claver, J. Stubbs, C. W. Bohlin, R. C. Deustua, S. Rest, A. Univ Arizona, Steward Observ Univ Arizona, Lunar & Planetary Lab cosmology: observations methods: data analysis surveys white dwarfs We present the initial results from a program aimed at establishing a network of hot DA white dwarfs to serve as spectrophotometric standards for present and future wide-field surveys. These stars span the equatorial zone and are faint enough to be conveniently observed throughout the year with large-aperture telescopes. The spectra of these white dwarfs are analyzed in order to generate a non-local-thermodynamic-equilibrium model atmosphere normalized to Hubble Space Telescope colors, including adjustments for wavelength-dependent interstellar extinction. Once established, this standard star network will serve ground-based observatories in both hemispheres as well as space-based instrumentation from the UV to the near IR. We demonstrate the effectiveness of this concept and show how two different approaches to the problem using somewhat different assumptions produce equivalent results. We discuss the lessons learned and the resulting corrective actions applied to our program. 2016-05-05 Article TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS 2016, 822 (2):67 The Astrophysical Journal 1538-4357 10.3847/0004-637X/822/2/67 http://hdl.handle.net/10150/621236 http://arizona.openrepository.com/arizona/handle/10150/621236 The Astrophysical Journal en http://stacks.iop.org/0004-637X/822/i=2/a=67?key=crossref.e75b1976b05877b5cdc758f9e0532142 © 2016. The American Astronomical Society. All rights reserved. IOP PUBLISHING LTD |
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language |
en |
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topic |
cosmology: observations methods: data analysis surveys white dwarfs |
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cosmology: observations methods: data analysis surveys white dwarfs Narayan, G. Axelrod, T. Holberg, J. B. Matheson, T. Saha, A. Olszewski, E. Claver, J. Stubbs, C. W. Bohlin, R. C. Deustua, S. Rest, A. TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS |
description |
We present the initial results from a program aimed at establishing a network of hot DA white dwarfs to serve as spectrophotometric standards for present and future wide-field surveys. These stars span the equatorial zone and are faint enough to be conveniently observed throughout the year with large-aperture telescopes. The spectra of these white dwarfs are analyzed in order to generate a non-local-thermodynamic-equilibrium model atmosphere normalized to Hubble Space Telescope colors, including adjustments for wavelength-dependent interstellar extinction. Once established, this standard star network will serve ground-based observatories in both hemispheres as well as space-based instrumentation from the UV to the near IR. We demonstrate the effectiveness of this concept and show how two different approaches to the problem using somewhat different assumptions produce equivalent results. We discuss the lessons learned and the resulting corrective actions applied to our program. |
author2 |
Univ Arizona, Steward Observ |
author_facet |
Univ Arizona, Steward Observ Narayan, G. Axelrod, T. Holberg, J. B. Matheson, T. Saha, A. Olszewski, E. Claver, J. Stubbs, C. W. Bohlin, R. C. Deustua, S. Rest, A. |
author |
Narayan, G. Axelrod, T. Holberg, J. B. Matheson, T. Saha, A. Olszewski, E. Claver, J. Stubbs, C. W. Bohlin, R. C. Deustua, S. Rest, A. |
author_sort |
Narayan, G. |
title |
TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS |
title_short |
TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS |
title_full |
TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS |
title_fullStr |
TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS |
title_full_unstemmed |
TOWARD A NETWORK OF FAINT DA WHITE DWARFS AS HIGH-PRECISION SPECTROPHOTOMETRIC STANDARDS |
title_sort |
toward a network of faint da white dwarfs as high-precision spectrophotometric standards |
publisher |
IOP PUBLISHING LTD |
publishDate |
2016 |
url |
http://hdl.handle.net/10150/621236 http://arizona.openrepository.com/arizona/handle/10150/621236 |
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