2024/11/13 by R. C. Bohlin, Bohlin, Ralph C., Susana E. Deustua +17 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Geophysics and Gravity Measurements #Instrumentation and Methods for Astrophysics (astro-ph.IM)
paper · pdf · doi:10.48550/arxiv.2411.09049
openalex publication_date 2024/11/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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 ∼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.