Photometry and Spectroscopy of Faint Candidate Spectrophotometric Standard da White Dwarfs

Annalisa Calamida, Thomas Matheson, Abhijit Saha, Edward W Olszewski, Gautham Narayan, Jenna Claver, Clare Shanahan, Jay Holberg, Tim Axelrod, Ralph Bohlin, Christopher W. Stubbs, Susana Deustua, Ivan - Hubeny, John Mackenty, Sean Points, Armin Rest, Elena Sabbi

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish (US)
Article number199
JournalAstrophysical Journal
Volume872
Issue number2
DOIs
StatePublished - Jan 1 2019

Fingerprint

photometry
spectroscopy
stars
signal-to-noise ratio
provenance
Northern Hemisphere
data products
saturation
equators
Hubble Space Telescope
dynamic range
density distribution
signal to noise ratios
derivation
flux density
energy
telescopes
product
distribution
comparison

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 journalArticle

Calamida, A, Matheson, T, Saha, A, Olszewski, EW, Narayan, G, Claver, J, Shanahan, C, Holberg, J, Axelrod, T, Bohlin, R, Stubbs, CW, Deustua, S, Hubeny, I, Mackenty, J, Points, S, Rest, A & Sabbi, E 2019, 'Photometry and Spectroscopy of Faint Candidate Spectrophotometric Standard da White Dwarfs', Astrophysical Journal, vol. 872, no. 2, 199. https://doi.org/10.3847/1538-4357/aafb13
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. / Photometry and Spectroscopy of Faint Candidate Spectrophotometric Standard da White Dwarfs. In: Astrophysical Journal. 2019 ; Vol. 872, No. 2.
@article{82cd5fd9497e4c36ad7471540f08c990,
title = "Photometry and Spectroscopy of Faint Candidate Spectrophotometric Standard da White Dwarfs",
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.",
keywords = "methods: observational, standards, stars: fundamental parameters, techniques: photometric, techniques: spectroscopic, white dwarfs",
author = "Annalisa Calamida and Thomas Matheson and Abhijit Saha and Olszewski, {Edward W} and Gautham Narayan and Jenna Claver and Clare Shanahan and Jay Holberg and Tim Axelrod and Ralph Bohlin and Stubbs, {Christopher W.} and Susana Deustua and Hubeny, {Ivan -} and John Mackenty and Sean Points and Armin Rest and Elena Sabbi",
year = "2019",
month = "1",
day = "1",
doi = "10.3847/1538-4357/aafb13",
language = "English (US)",
volume = "872",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

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 -