TY - JOUR
T1 - Photometry and Spectroscopy of Faint Candidate Spectrophotometric Standard da White Dwarfs
AU - Calamida, Annalisa
AU - Matheson, Thomas
AU - Saha, Abhijit
AU - Olszewski, Edward
AU - Narayan, Gautham
AU - Claver, Jenna
AU - Shanahan, Clare
AU - Holberg, Jay
AU - Axelrod, Tim
AU - Bohlin, Ralph
AU - Stubbs, Christopher W.
AU - Deustua, Susana
AU - Hubeny, Ivan
AU - Mackenty, John
AU - Points, Sean
AU - Rest, Armin
AU - Sabbi, Elena
N1 - Funding Information:
IRAF is distributed by the National Optical Astronomy Observatory, which is operated by AURA under cooperative agreement with the NSF.
Funding Information:
This study was supported by NASA through grants GO-12967 and GO-13711 from the National Optical Astronomy Observatory, which is operated by AURA, Inc., and grant GO-15113 from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555. E.O. was also partially supported by the NSF through grants AST-1313006 and AST-1815767. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https:// www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, particularly the institutions participating in the Gaia Multilateral Agreement.
PY - 2019
Y1 - 2019
N2 - We present precise photometry and spectroscopy for 23 candidate spectrophotometric standard white dwarfs. The selected stars are distributed in the Northern hemisphere and around the celestial equator, and are all fainter than r ∼ 16.5 mag. This network of stars, when established as standards and together with the three Hubble Space Telescope primary CALSPEC white dwarfs, will provide a set of spectrophotometric standards to directly calibrate data products to better than 1%. In future deep photometric surveys and facilities, these new faint standard white dwarfs will have enough signal-to-noise ratio to be measured accurately while still avoiding saturation. They will also fall within the dynamic range of large telescopes and their instruments for the foreseeable future. This paper discusses the provenance of the observational data for our candidate standard stars. A comparison with models, reconciliation with reddening, and the consequent derivation of the full spectral energy density distributions for each of them is reserved for a subsequent paper.
AB - We present precise photometry and spectroscopy for 23 candidate spectrophotometric standard white dwarfs. The selected stars are distributed in the Northern hemisphere and around the celestial equator, and are all fainter than r ∼ 16.5 mag. This network of stars, when established as standards and together with the three Hubble Space Telescope primary CALSPEC white dwarfs, will provide a set of spectrophotometric standards to directly calibrate data products to better than 1%. In future deep photometric surveys and facilities, these new faint standard white dwarfs will have enough signal-to-noise ratio to be measured accurately while still avoiding saturation. They will also fall within the dynamic range of large telescopes and their instruments for the foreseeable future. This paper discusses the provenance of the observational data for our candidate standard stars. A comparison with models, reconciliation with reddening, and the consequent derivation of the full spectral energy density distributions for each of them is reserved for a subsequent paper.
KW - methods: observational
KW - standards
KW - stars: fundamental parameters
KW - techniques: photometric
KW - techniques: spectroscopic
KW - white dwarfs
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U2 - 10.3847/1538-4357/aafb13
DO - 10.3847/1538-4357/aafb13
M3 - Article
AN - SCOPUS:85063460196
VL - 872
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 199
ER -