Abstract
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.
| Original language | English (US) |
|---|---|
| Article number | 199 |
| Journal | Astrophysical Journal |
| Volume | 872 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 1 2019 |
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Keywords
- methods: observational
- standards
- stars: fundamental parameters
- techniques: photometric
- techniques: spectroscopic
- white dwarfs
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
Photometry and Spectroscopy of Faint Candidate Spectrophotometric Standard da White Dwarfs. / Calamida, Annalisa; Matheson, Thomas; Saha, Abhijit; Olszewski, Edward W; Narayan, Gautham; Claver, Jenna; Shanahan, Clare; Holberg, Jay; Axelrod, Tim; Bohlin, Ralph; Stubbs, Christopher W.; Deustua, Susana; Hubeny, Ivan -; Mackenty, John; Points, Sean; Rest, Armin; Sabbi, Elena.
In: Astrophysical Journal, Vol. 872, No. 2, 199, 01.01.2019.Research output: Contribution to journal › Article
}
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 W
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
PY - 2019/1/1
Y1 - 2019/1/1
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
UR - http://www.scopus.com/inward/record.url?scp=85063460196&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063460196&partnerID=8YFLogxK
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 -