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Astrophysics > Instrumentation and Methods for Astrophysics

arXiv:2411.09049 (astro-ph)
[Submitted on 13 Nov 2024]

Title:Faint white dwarf flux standards: data and models

Authors:Ralph C. Bohlin, Susana Deustua, Gautham Narayan, Abhijit Saha, Annalisa Calamida, Karl D. Gordon, Jay B. Holberg, Ivan Hubeny, Thomas Matheson, Armin Rest
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Abstract:Fainter standard stars are essential for the calibration of larger telescopes. This work adds to the CALSPEC (calibration spectra) database 19 faint white dwarfs (WDs) with all-sky coverage and V magnitudes between 16.5 and 18.7. Included for these stars is new UV (ultraviolet) HST (Hubble Space Telescope) STIS (Space Telescope Imaging Spectrometer) spectrophotometry between 1150 and 3000~Å with a resolution of $\sim$500. Pure hydrogen WD models are fit to these UV spectra and to six-band HST/WFC3 (Wide Field Camera 3) photometry at 0.28 to 1.6~\micron\ to construct predicted model SEDs (spectral energy distributions) covering wavelengths from 900~Å to the JWST (James Webb Space Telescope) limit of 30~\micron\ using well-established CALSPEC procedures for producing flux standards with the goal of 1\% accuracy.
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM)
Cite as: arXiv:2411.09049 [astro-ph.IM]
  (or arXiv:2411.09049v1 [astro-ph.IM] for this version)
  https://doi.org/10.48550/arXiv.2411.09049

Submission history

From: Ralph Bohlin [view email]
[v1] Wed, 13 Nov 2024 22:09:43 UTC (5,727 KB)
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