A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey

S. S. Tie; P. Martini; D. Mudd; F. Ostrovski; S. L. Reed; C. Lidman; C. Kochanek; T. M. Davis; R. Sharp; S. Uddin; A. King; W. Wester; B. E. Tucker; D. L. Tucker; E. Buckley-Geer; D. Carollo; M. Childress; K. Glazebrook; S. R. Hinton; G. Lewis; E. Macaulay; C. R. O'Neill; T. M.C. Abbott; F. B. Abdalla; J. Annis; A. Benoit-Lévy; E. Bertin; D. Brooks; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; C. E. Cunha; L. N. Da Costa; D. L. Depoy; S. Desai; P. Doel; T. F. Eifler; A. E. Evrard; D. A. Finley; B. Flaugher; P. Fosalba; J. Frieman; J. García-Bellido; E. Gaztanaga; D. W. Gerdes; D. A. Goldstein; D. Gruen; R. A. Gruendl; G. Gutierrez; K. Honscheid; D. J. James; K. Kuehn; N. Kuropatkin; M. Lima; M. A.G. Maia; J. L. Marshall; F. Menanteau; C. J. Miller; R. Miquel; R. C. Nichol; B. Nord; R. Ogando; A. A. Plazas; A. K. Romer; E. Sanchez; B. Santiago; V. Scarpine; M. Schubnell; I. Sevilla-Noarbe; R. C. Smith; M. Soares-Santos; F. Sobreira; E. Suchyta; M. E.C. Swanson; G. Tarle; D. Thomas; A. R. Walker

doi:10.3847/1538-3881/aa5b8d

A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey

S. S. Tie, P. Martini, D. Mudd, F. Ostrovski, S. L. Reed, C. Lidman, C. Kochanek, T. M. Davis, R. Sharp, S. Uddin, A. King, W. Wester, B. E. Tucker, D. L. Tucker, E. Buckley-Geer, D. Carollo, M. Childress, K. Glazebrook, S. R. Hinton, G. LewisE. Macaulay, C. R. O'Neill, T. M.C. Abbott, F. B. Abdalla, J. Annis, A. Benoit-Lévy, E. Bertin, D. Brooks, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, C. E. Cunha, L. N. Da Costa, D. L. Depoy, S. Desai, P. Doel, T. F. Eifler, A. E. Evrard, D. A. Finley, B. Flaugher, P. Fosalba, J. Frieman, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, D. A. Goldstein, D. Gruen, R. A. Gruendl, G. Gutierrez, K. Honscheid, D. J. James, K. Kuehn, N. Kuropatkin, M. Lima, M. A.G. Maia, J. L. Marshall, F. Menanteau, C. J. Miller, R. Miquel, R. C. Nichol, B. Nord, R. Ogando, A. A. Plazas, A. K. Romer, E. Sanchez, B. Santiago, V. Scarpine, M. Schubnell, I. Sevilla-Noarbe, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. E.C. Swanson, G. Tarle, D. Thomas, A. R. Walker

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© 2017. The American Astronomical Society. All rights reserved.. We present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/probabilistic modeling with variability. In all cases, we considered only objects that appear as point sources in the DES images. We examine color selection methods based on the Wide-field Infrared Survey Explorer (WISE) mid-IR color, a mixture of WISE and DES colors (g - i and ), and a mixture of Vista Hemisphere Survey and DES colors (g - i and i - K). For probabilistic quasar selection, we used XDQSO, an algorithm that employs an empirical multi-wavelength flux model of quasars to assign quasar probabilities. Our variability selection uses the multi-band χ 2-probability that sources are constant in the DES Year 1 griz-band light curves. The completeness and efficiency are calculated relative to an underlying sample of point sources that are detected in the required selection bands and pass our data quality and photometric error cuts. We conduct our analyses at two magnitude limits, i < 19.8 mag and i < 22 mag. For the subset of sources with W1 and W2 detections, the color or XDQSOz method combined with variability gives the highest completenesses of >85% for both i-band magnitude limits and efficiencies of >80% to the bright limit and >60% to the faint limit; however, the giW1 and giW1+variability methods give the highest quasar surface densities. The XDQSOz method and combinations of W1W2/giW1/XDQSOz with variability are among the better selection methods when both high completeness and high efficiency are desired. We also present the OzDES Quasar Catalog of 1263 spectroscopically confirmed quasars from three years of OzDES observation in the 30 deg2 of the DES supernova fields. The catalog includes quasars with redshifts up to z ∼ 4 and brighter than i = 22 mag, although the catalog is not complete up to this magnitude limit.

Idioma original	Anglès
Número d’article	107
Revista	Astronomical Journal
Volum	153
Número	3
DOIs	https://doi.org/10.3847/1538-3881/aa5b8d
Estat de la publicació	Publicada - 1 de març 2017

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10.3847/1538-3881/aa5b8d

Australian Dark Energy Survey (OzDES) quasar catalog
Tie, S. S. (Creador), Martini, P. (Creador), Mudd, D. (Creador), Ostrovski, F. (Creador), Reed, S. L. (Creador), Lidman, C. (Creador), Kochanek, C. (Creador), Davis, T. M. (Creador), Sharp, R. (Creador), Uddin, S. (Creador), King, A. (Creador), Wester, W. (Creador), Tucker, B. E. (Creador), Tucker, D. L. (Creador), Buckley-Geer, E. (Creador), Carollo, D. (Creador), Childress, M. (Creador), Glazebrook, K. (Creador), Hinton, S. R. (Creador), Lewis, G. (Creador), Macaulay, E. (Creador), O'Neill, C. R. (Creador), Abbott, T. M. C. (Col·laborador), Abdalla, F. B. (Creador), Annis, J. (Creador), Benoit-Lévy, A. (Col·laborador), Bertin, E. (Creador), Brooks, D. (Creador), Carnero Rosell, R. A. (Creador), Carrasco Kind, K. M. (Creador), Carretero, J. (Creador), Cunha, C. E. (Creador), Da Costa, C. L. N. (Creador), Depoy, D. L. (Col·laborador), Desai, S. (Creador), Doel, P. (Creador), Eifler, T. F. (Creador), Evrard, A. E. (Creador), Finley, D. A. (Creador), Flaugher, B. (Creador), Fosalba, P. (Creador), Frieman, J. (Creador), García-Bellido, J. (Col·laborador), Gaztanaga, E. (Creador), Gerdes, D. W. (Creador), Goldstein, D. A. (Creador), Gruen, D. (Creador), Gruendl, R. A. (Creador), Gutierrez, G. (Creador), Honscheid, K. (Creador), James, D. J. (Creador), Kuehn, K. (Creador), Kuropatkin, N. (Creador), Lima, M. (Creador), Maia, M. A. G. (Col·laborador), Marshall, J. L. (Creador), Menanteau, F. (Creador), Miller, C. J. (Creador), Miquel, R. (Creador), Nichol, R. C. (Creador), Nord, B. (Creador), Ogando, R. (Creador), Plazas, A. A. (Creador), Romer, A. K. (Creador), Sanchez, E. (Creador), Santiago, B. (Creador), Scarpine, V. (Creador), Schubnell, M. (Creador), Sevilla-Noarbe, I. (Creador), Smith, R. C. (Creador), Soares-Santos, M. (Creador), Sobreira, F. (Creador), Suchyta, E. (Creador), Swanson, M. E. C. (Col·laborador), Tarle, G. (Creador), Thomas, D. (Creador) & Walker, A. R. (Creador), Centre de Donnees Strasbourg (CDS), 3 de maig 2018
DOI: 10.26093/cds/vizier.51530107, https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/153/107
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Tie, S. S., Martini, P., Mudd, D., Ostrovski, F., Reed, S. L., Lidman, C., Kochanek, C., Davis, T. M., Sharp, R., Uddin, S., King, A., Wester, W., Tucker, B. E., Tucker, D. L., Buckley-Geer, E., Carollo, D., Childress, M., Glazebrook, K., Hinton, S. R., ... Walker, A. R. (2017). A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey. Astronomical Journal, 153(3), Article 107. https://doi.org/10.3847/1538-3881/aa5b8d

@article{00f3ec98bf4f4133b253a2d6695b2a54,

title = "A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey",

abstract = "{\textcopyright} 2017. The American Astronomical Society. All rights reserved.. We present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/probabilistic modeling with variability. In all cases, we considered only objects that appear as point sources in the DES images. We examine color selection methods based on the Wide-field Infrared Survey Explorer (WISE) mid-IR color, a mixture of WISE and DES colors (g - i and ), and a mixture of Vista Hemisphere Survey and DES colors (g - i and i - K). For probabilistic quasar selection, we used XDQSO, an algorithm that employs an empirical multi-wavelength flux model of quasars to assign quasar probabilities. Our variability selection uses the multi-band χ 2-probability that sources are constant in the DES Year 1 griz-band light curves. The completeness and efficiency are calculated relative to an underlying sample of point sources that are detected in the required selection bands and pass our data quality and photometric error cuts. We conduct our analyses at two magnitude limits, i < 19.8 mag and i < 22 mag. For the subset of sources with W1 and W2 detections, the color or XDQSOz method combined with variability gives the highest completenesses of >85% for both i-band magnitude limits and efficiencies of >80% to the bright limit and >60% to the faint limit; however, the giW1 and giW1+variability methods give the highest quasar surface densities. The XDQSOz method and combinations of W1W2/giW1/XDQSOz with variability are among the better selection methods when both high completeness and high efficiency are desired. We also present the OzDES Quasar Catalog of 1263 spectroscopically confirmed quasars from three years of OzDES observation in the 30 deg2 of the DES supernova fields. The catalog includes quasars with redshifts up to z ∼ 4 and brighter than i = 22 mag, although the catalog is not complete up to this magnitude limit.",

keywords = "quasars: general",

author = "Tie, {S. S.} and P. Martini and D. Mudd and F. Ostrovski and Reed, {S. L.} and C. Lidman and C. Kochanek and Davis, {T. M.} and R. Sharp and S. Uddin and A. King and W. Wester and Tucker, {B. E.} and Tucker, {D. L.} and E. Buckley-Geer and D. Carollo and M. Childress and K. Glazebrook and Hinton, {S. R.} and G. Lewis and E. Macaulay and O'Neill, {C. R.} and Abbott, {T. M.C.} and Abdalla, {F. B.} and J. Annis and A. Benoit-L{\'e}vy and E. Bertin and D. Brooks and {Carnero Rosell}, A. and {Carrasco Kind}, M. and J. Carretero and Cunha, {C. E.} and {Da Costa}, {L. N.} and Depoy, {D. L.} and S. Desai and P. Doel and Eifler, {T. F.} and Evrard, {A. E.} and Finley, {D. A.} and B. Flaugher and P. Fosalba and J. Frieman and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and Goldstein, {D. A.} and D. Gruen and Gruendl, {R. A.} and G. Gutierrez and K. Honscheid and James, {D. J.} and K. Kuehn and N. Kuropatkin and M. Lima and Maia, {M. A.G.} and Marshall, {J. L.} and F. Menanteau and Miller, {C. J.} and R. Miquel and Nichol, {R. C.} and B. Nord and R. Ogando and Plazas, {A. A.} and Romer, {A. K.} and E. Sanchez and B. Santiago and V. Scarpine and M. Schubnell and I. Sevilla-Noarbe and Smith, {R. C.} and M. Soares-Santos and F. Sobreira and E. Suchyta and Swanson, {M. E.C.} and G. Tarle and D. Thomas and Walker, {A. R.}",

year = "2017",

month = mar,

day = "1",

doi = "10.3847/1538-3881/aa5b8d",

language = "English",

volume = "153",

journal = "Astronomical Journal",

issn = "0004-6256",

number = "3",

}

Tie, SS, Martini, P, Mudd, D, Ostrovski, F, Reed, SL, Lidman, C, Kochanek, C, Davis, TM, Sharp, R, Uddin, S, King, A, Wester, W, Tucker, BE, Tucker, DL, Buckley-Geer, E, Carollo, D, Childress, M, Glazebrook, K, Hinton, SR, Lewis, G, Macaulay, E, O'Neill, CR, Abbott, TMC, Abdalla, FB, Annis, J, Benoit-Lévy, A, Bertin, E, Brooks, D, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Cunha, CE, Da Costa, LN, Depoy, DL, Desai, S, Doel, P, Eifler, TF, Evrard, AE, Finley, DA, Flaugher, B, Fosalba, P, Frieman, J, García-Bellido, J, Gaztanaga, E, Gerdes, DW, Goldstein, DA, Gruen, D, Gruendl, RA, Gutierrez, G, Honscheid, K, James, DJ, Kuehn, K, Kuropatkin, N, Lima, M, Maia, MAG, Marshall, JL, Menanteau, F, Miller, CJ, Miquel, R, Nichol, RC, Nord, B, Ogando, R, Plazas, AA, Romer, AK, Sanchez, E, Santiago, B, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, RC, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D & Walker, AR 2017, 'A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey', Astronomical Journal, vol. 153, núm. 3, 107. https://doi.org/10.3847/1538-3881/aa5b8d

TY - JOUR

T1 - A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey

AU - Tie, S. S.

AU - Martini, P.

AU - Mudd, D.

AU - Ostrovski, F.

AU - Reed, S. L.

AU - Lidman, C.

AU - Kochanek, C.

AU - Davis, T. M.

AU - Sharp, R.

AU - Uddin, S.

AU - King, A.

AU - Wester, W.

AU - Tucker, B. E.

AU - Tucker, D. L.

AU - Buckley-Geer, E.

AU - Carollo, D.

AU - Childress, M.

AU - Glazebrook, K.

AU - Hinton, S. R.

AU - Lewis, G.

AU - Macaulay, E.

AU - O'Neill, C. R.

AU - Abbott, T. M.C.

AU - Abdalla, F. B.

AU - Annis, J.

AU - Benoit-Lévy, A.

AU - Bertin, E.

AU - Brooks, D.

AU - Carnero Rosell, A.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - Cunha, C. E.

AU - Da Costa, L. N.

AU - Depoy, D. L.

AU - Desai, S.

AU - Doel, P.

AU - Eifler, T. F.

AU - Evrard, A. E.

AU - Finley, D. A.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Goldstein, D. A.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gutierrez, G.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Lima, M.

AU - Maia, M. A.G.

AU - Marshall, J. L.

AU - Menanteau, F.

AU - Miller, C. J.

AU - Miquel, R.

AU - Nichol, R. C.

AU - Nord, B.

AU - Ogando, R.

AU - Plazas, A. A.

AU - Romer, A. K.

AU - Sanchez, E.

AU - Santiago, B.

AU - Scarpine, V.

AU - Schubnell, M.

AU - Sevilla-Noarbe, I.

AU - Smith, R. C.

AU - Soares-Santos, M.

AU - Sobreira, F.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Thomas, D.

AU - Walker, A. R.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - © 2017. The American Astronomical Society. All rights reserved.. We present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/probabilistic modeling with variability. In all cases, we considered only objects that appear as point sources in the DES images. We examine color selection methods based on the Wide-field Infrared Survey Explorer (WISE) mid-IR color, a mixture of WISE and DES colors (g - i and ), and a mixture of Vista Hemisphere Survey and DES colors (g - i and i - K). For probabilistic quasar selection, we used XDQSO, an algorithm that employs an empirical multi-wavelength flux model of quasars to assign quasar probabilities. Our variability selection uses the multi-band χ 2-probability that sources are constant in the DES Year 1 griz-band light curves. The completeness and efficiency are calculated relative to an underlying sample of point sources that are detected in the required selection bands and pass our data quality and photometric error cuts. We conduct our analyses at two magnitude limits, i < 19.8 mag and i < 22 mag. For the subset of sources with W1 and W2 detections, the color or XDQSOz method combined with variability gives the highest completenesses of >85% for both i-band magnitude limits and efficiencies of >80% to the bright limit and >60% to the faint limit; however, the giW1 and giW1+variability methods give the highest quasar surface densities. The XDQSOz method and combinations of W1W2/giW1/XDQSOz with variability are among the better selection methods when both high completeness and high efficiency are desired. We also present the OzDES Quasar Catalog of 1263 spectroscopically confirmed quasars from three years of OzDES observation in the 30 deg2 of the DES supernova fields. The catalog includes quasars with redshifts up to z ∼ 4 and brighter than i = 22 mag, although the catalog is not complete up to this magnitude limit.

AB - © 2017. The American Astronomical Society. All rights reserved.. We present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/probabilistic modeling with variability. In all cases, we considered only objects that appear as point sources in the DES images. We examine color selection methods based on the Wide-field Infrared Survey Explorer (WISE) mid-IR color, a mixture of WISE and DES colors (g - i and ), and a mixture of Vista Hemisphere Survey and DES colors (g - i and i - K). For probabilistic quasar selection, we used XDQSO, an algorithm that employs an empirical multi-wavelength flux model of quasars to assign quasar probabilities. Our variability selection uses the multi-band χ 2-probability that sources are constant in the DES Year 1 griz-band light curves. The completeness and efficiency are calculated relative to an underlying sample of point sources that are detected in the required selection bands and pass our data quality and photometric error cuts. We conduct our analyses at two magnitude limits, i < 19.8 mag and i < 22 mag. For the subset of sources with W1 and W2 detections, the color or XDQSOz method combined with variability gives the highest completenesses of >85% for both i-band magnitude limits and efficiencies of >80% to the bright limit and >60% to the faint limit; however, the giW1 and giW1+variability methods give the highest quasar surface densities. The XDQSOz method and combinations of W1W2/giW1/XDQSOz with variability are among the better selection methods when both high completeness and high efficiency are desired. We also present the OzDES Quasar Catalog of 1263 spectroscopically confirmed quasars from three years of OzDES observation in the 30 deg2 of the DES supernova fields. The catalog includes quasars with redshifts up to z ∼ 4 and brighter than i = 22 mag, although the catalog is not complete up to this magnitude limit.

KW - quasars: general

U2 - 10.3847/1538-3881/aa5b8d

DO - 10.3847/1538-3881/aa5b8d

M3 - Article

SN - 0004-6256

VL - 153

JO - Astronomical Journal

JF - Astronomical Journal

IS - 3

M1 - 107

ER -

A Study of Quasar Selection in the Supernova Fields of the Dark Energy Survey

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Australian Dark Energy Survey (OzDES) quasar catalog

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