DES meets Gaia: Discovery of strongly lensed quasars from a multiplet search

A. Agnello; H. Lin; N. Kuropatkin; E. Buckley-Geer; T. Anguita; P. L. Schechter; T. Morishita; V. Motta; K. Rojas; T. Treu; A. Amara; M. W. Auger; F. Courbin; C. D. Fassnacht; J. Frieman; A. More; P. J. Marshall; R. G. McMahon; G. Meylan; S. H. Suyu; K. Glazebrook; N. Morgan; B. Nord; T. M.C. Abbott; F. B. Abdalla; J. Annis; K. Bechtol; K. Benoit-Lévy; E. Bertin; R. A. Bernstein; D. Brooks; D. L. Burke; A. Carnero Rosell; J. Carretero; C. E. Cunha; C. B. D'Andrea; L. N. da Costa; S. Desai; A. Drlica-Wagner; T. F. Eifler; B. Flaugher; J. García-Bellido; E. Gaztanaga; D. W. Gerdes; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; K. Honscheid; D. J. James; K. Kuehn; O. Lahav; M. Lima; M. A.G. Maia; M. March; F. Menanteau; R. Miquel; R. L.C. Ogando; A. A. Plazas; E. Sanchez; V. Scarpine; R. Schindler; M. Schubnell; I. Sevilla-Noarbe; M. Smith; M. Soares-Santos; F. Sobreira; E. Suchyta; M. E.C. Swanson; G. Tarle; D. Tucker; R. Wechsler

doi:10.1093/mnras/sty1419

DES meets Gaia: Discovery of strongly lensed quasars from a multiplet search

A. Agnello, H. Lin, N. Kuropatkin, E. Buckley-Geer, T. Anguita, P. L. Schechter, T. Morishita, V. Motta, K. Rojas, T. Treu, A. Amara, M. W. Auger, F. Courbin, C. D. Fassnacht, J. Frieman, A. More, P. J. Marshall, R. G. McMahon, G. Meylan, S. H. SuyuK. Glazebrook, N. Morgan, B. Nord, T. M.C. Abbott, F. B. Abdalla, J. Annis, K. Bechtol, K. Benoit-Lévy, E. Bertin, R. A. Bernstein, D. Brooks, D. L. Burke, A. Carnero Rosell, J. Carretero, C. E. Cunha, C. B. D'Andrea, L. N. da Costa, S. Desai, A. Drlica-Wagner, T. F. Eifler, B. Flaugher, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, K. Honscheid, D. J. James, K. Kuehn, O. Lahav, M. Lima, M. A.G. Maia, M. March, F. Menanteau, R. Miquel, R. L.C. Ogando, A. A. Plazas, E. Sanchez, V. Scarpine, R. Schindler, M. Schubnell, I. Sevilla-Noarbe, M. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. E.C. Swanson, G. Tarle, D. Tucker, R. Wechsler

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Abstract

We report the discovery, spectroscopic confirmation, and first lens models of the first, strongly lensed quasars from a combined search in WISE and Gaia-DR1 over the DES footprint. Their Einstein radii span a range between ≈2.0 arcsec and ≈0.4 arcsec. Two of these (WGD2038-4008, RA = 20:38:02.65, Dec.=-40:08:14.64; WGD2021-4115, RA = 20:21:39.45, Dec. = -41:15:57.11) also have confirmed deflector redshifts. The four-image lens WGD2038-4008, with source and deflector redshifts s = 0.777 ± 0.001 and z_l = 0.230 ± 0.002, respectively, has a deflector with radius R_eff ≈ 3.4 arcsec, stellar mass log(M_*/M_⊙) = 11.64^+0.20 _-0.43, and extended isophotal shape variation. Simple lens models yield Einstein radii R_E = (1.30 ± 0.04) arcsec, axis ratio q = 0.75 ± 0.1 (compatible with that of the starlight) and considerable shear-ellipticity degeneracies. The two-image lens WGD2021-4115 has z_s = 1.390 ± 0.001 and z_l = 0.335 ± 0.002, and Einstein radius RE = (1.1 ± 0.1) arcsec, but higher-resolution imaging is needed to accurately separate the deflector and faint quasar image. Analogous lens model degeneracies hold for the other six lenses (J0146-1133, J0150-4041, J0235-2433, J0245-0556, J0259-2338, and J0508-2748) shown in this paper.

Original language	English (US)
Pages (from-to)	4345-4354
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	479
Issue number	4
DOIs	https://doi.org/10.1093/mnras/sty1419
State	Published - Oct 1 2018
Externally published	Yes

Keywords

Gravitational lensing: strong
Methods: statistical
Surveys
Techniques: image processing

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/sty1419

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Agnello, A., Lin, H., Kuropatkin, N., Buckley-Geer, E., Anguita, T., Schechter, P. L., Morishita, T., Motta, V., Rojas, K., Treu, T., Amara, A., Auger, M. W., Courbin, F., Fassnacht, C. D., Frieman, J., More, A., Marshall, P. J., McMahon, R. G., Meylan, G., ... Wechsler, R. (2018). DES meets Gaia: Discovery of strongly lensed quasars from a multiplet search. Monthly Notices of the Royal Astronomical Society, 479(4), 4345-4354. https://doi.org/10.1093/mnras/sty1419

Agnello, A, Lin, H, Kuropatkin, N, Buckley-Geer, E, Anguita, T, Schechter, PL, Morishita, T, Motta, V, Rojas, K, Treu, T, Amara, A, Auger, MW, Courbin, F, Fassnacht, CD, Frieman, J, More, A, Marshall, PJ, McMahon, RG, Meylan, G, Suyu, SH, Glazebrook, K, Morgan, N, Nord, B, Abbott, TMC, Abdalla, FB, Annis, J, Bechtol, K, Benoit-Lévy, K, Bertin, E, Bernstein, RA, Brooks, D, Burke, DL, Carnero Rosell, A, Carretero, J, Cunha, CE, D'Andrea, CB, da Costa, LN, Desai, S, Drlica-Wagner, A, Eifler, TF, Flaugher, B, García-Bellido, J, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Honscheid, K, James, DJ, Kuehn, K, Lahav, O, Lima, M, Maia, MAG, March, M, Menanteau, F, Miquel, R, Ogando, RLC, Plazas, AA, Sanchez, E, Scarpine, V, Schindler, R, Schubnell, M, Sevilla-Noarbe, I, Smith, M, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Tucker, D & Wechsler, R 2018, 'DES meets Gaia: Discovery of strongly lensed quasars from a multiplet search', Monthly Notices of the Royal Astronomical Society, vol. 479, no. 4, pp. 4345-4354. https://doi.org/10.1093/mnras/sty1419

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title = "DES meets Gaia: Discovery of strongly lensed quasars from a multiplet search",

abstract = "We report the discovery, spectroscopic confirmation, and first lens models of the first, strongly lensed quasars from a combined search in WISE and Gaia-DR1 over the DES footprint. Their Einstein radii span a range between ≈2.0 arcsec and ≈0.4 arcsec. Two of these (WGD2038-4008, RA = 20:38:02.65, Dec.=-40:08:14.64; WGD2021-4115, RA = 20:21:39.45, Dec. = -41:15:57.11) also have confirmed deflector redshifts. The four-image lens WGD2038-4008, with source and deflector redshifts s = 0.777 ± 0.001 and zl = 0.230 ± 0.002, respectively, has a deflector with radius Reff ≈ 3.4 arcsec, stellar mass log(M*/M⊙) = 11.64+0.20 -0.43, and extended isophotal shape variation. Simple lens models yield Einstein radii RE = (1.30 ± 0.04) arcsec, axis ratio q = 0.75 ± 0.1 (compatible with that of the starlight) and considerable shear-ellipticity degeneracies. The two-image lens WGD2021-4115 has zs = 1.390 ± 0.001 and zl = 0.335 ± 0.002, and Einstein radius RE = (1.1 ± 0.1) arcsec, but higher-resolution imaging is needed to accurately separate the deflector and faint quasar image. Analogous lens model degeneracies hold for the other six lenses (J0146-1133, J0150-4041, J0235-2433, J0245-0556, J0259-2338, and J0508-2748) shown in this paper.",

keywords = "Gravitational lensing: strong, Methods: statistical, Surveys, Techniques: image processing",

author = "A. Agnello and H. Lin and N. Kuropatkin and E. Buckley-Geer and T. Anguita and Schechter, {P. L.} and T. Morishita and V. Motta and K. Rojas and T. Treu and A. Amara and Auger, {M. W.} and F. Courbin and Fassnacht, {C. D.} and J. Frieman and A. More and Marshall, {P. J.} and McMahon, {R. G.} and G. Meylan and Suyu, {S. H.} and K. Glazebrook and N. Morgan and B. Nord and Abbott, {T. M.C.} and Abdalla, {F. B.} and J. Annis and K. Bechtol and K. Benoit-L{\'e}vy and E. Bertin and Bernstein, {R. A.} and D. Brooks and Burke, {D. L.} and {Carnero Rosell}, A. and J. Carretero and Cunha, {C. E.} and D'Andrea, {C. B.} and {da Costa}, {L. N.} and S. Desai and A. Drlica-Wagner and Eifler, {T. F.} and B. Flaugher and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and K. Honscheid and James, {D. J.} and K. Kuehn and O. Lahav and M. Lima and Maia, {M. A.G.} and M. March and F. Menanteau and R. Miquel and Ogando, {R. L.C.} and Plazas, {A. A.} and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and I. Sevilla-Noarbe and M. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and Swanson, {M. E.C.} and G. Tarle and D. Tucker and R. Wechsler",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2018",

month = oct,

day = "1",

doi = "10.1093/mnras/sty1419",

language = "English (US)",

volume = "479",

pages = "4345--4354",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

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TY - JOUR

T1 - DES meets Gaia

T2 - Discovery of strongly lensed quasars from a multiplet search

AU - Agnello, A.

AU - Lin, H.

AU - Kuropatkin, N.

AU - Buckley-Geer, E.

AU - Anguita, T.

AU - Schechter, P. L.

AU - Morishita, T.

AU - Motta, V.

AU - Rojas, K.

AU - Treu, T.

AU - Amara, A.

AU - Auger, M. W.

AU - Courbin, F.

AU - Fassnacht, C. D.

AU - Frieman, J.

AU - More, A.

AU - Marshall, P. J.

AU - McMahon, R. G.

AU - Meylan, G.

AU - Suyu, S. H.

AU - Glazebrook, K.

AU - Morgan, N.

AU - Nord, B.

AU - Abbott, T. M.C.

AU - Abdalla, F. B.

AU - Annis, J.

AU - Bechtol, K.

AU - Benoit-Lévy, K.

AU - Bertin, E.

AU - Bernstein, R. A.

AU - Brooks, D.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carretero, J.

AU - Cunha, C. E.

AU - D'Andrea, C. B.

AU - da Costa, L. N.

AU - Desai, S.

AU - Drlica-Wagner, A.

AU - Eifler, T. F.

AU - Flaugher, B.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Lahav, O.

AU - Lima, M.

AU - Maia, M. A.G.

AU - March, M.

AU - Menanteau, F.

AU - Miquel, R.

AU - Ogando, R. L.C.

AU - Plazas, A. A.

AU - Sanchez, E.

AU - Scarpine, V.

AU - Schindler, R.

AU - Schubnell, M.

AU - Sevilla-Noarbe, I.

AU - Smith, M.

AU - Soares-Santos, M.

AU - Sobreira, F.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Tucker, D.

AU - Wechsler, R.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - We report the discovery, spectroscopic confirmation, and first lens models of the first, strongly lensed quasars from a combined search in WISE and Gaia-DR1 over the DES footprint. Their Einstein radii span a range between ≈2.0 arcsec and ≈0.4 arcsec. Two of these (WGD2038-4008, RA = 20:38:02.65, Dec.=-40:08:14.64; WGD2021-4115, RA = 20:21:39.45, Dec. = -41:15:57.11) also have confirmed deflector redshifts. The four-image lens WGD2038-4008, with source and deflector redshifts s = 0.777 ± 0.001 and zl = 0.230 ± 0.002, respectively, has a deflector with radius Reff ≈ 3.4 arcsec, stellar mass log(M*/M⊙) = 11.64+0.20 -0.43, and extended isophotal shape variation. Simple lens models yield Einstein radii RE = (1.30 ± 0.04) arcsec, axis ratio q = 0.75 ± 0.1 (compatible with that of the starlight) and considerable shear-ellipticity degeneracies. The two-image lens WGD2021-4115 has zs = 1.390 ± 0.001 and zl = 0.335 ± 0.002, and Einstein radius RE = (1.1 ± 0.1) arcsec, but higher-resolution imaging is needed to accurately separate the deflector and faint quasar image. Analogous lens model degeneracies hold for the other six lenses (J0146-1133, J0150-4041, J0235-2433, J0245-0556, J0259-2338, and J0508-2748) shown in this paper.

AB - We report the discovery, spectroscopic confirmation, and first lens models of the first, strongly lensed quasars from a combined search in WISE and Gaia-DR1 over the DES footprint. Their Einstein radii span a range between ≈2.0 arcsec and ≈0.4 arcsec. Two of these (WGD2038-4008, RA = 20:38:02.65, Dec.=-40:08:14.64; WGD2021-4115, RA = 20:21:39.45, Dec. = -41:15:57.11) also have confirmed deflector redshifts. The four-image lens WGD2038-4008, with source and deflector redshifts s = 0.777 ± 0.001 and zl = 0.230 ± 0.002, respectively, has a deflector with radius Reff ≈ 3.4 arcsec, stellar mass log(M*/M⊙) = 11.64+0.20 -0.43, and extended isophotal shape variation. Simple lens models yield Einstein radii RE = (1.30 ± 0.04) arcsec, axis ratio q = 0.75 ± 0.1 (compatible with that of the starlight) and considerable shear-ellipticity degeneracies. The two-image lens WGD2021-4115 has zs = 1.390 ± 0.001 and zl = 0.335 ± 0.002, and Einstein radius RE = (1.1 ± 0.1) arcsec, but higher-resolution imaging is needed to accurately separate the deflector and faint quasar image. Analogous lens model degeneracies hold for the other six lenses (J0146-1133, J0150-4041, J0235-2433, J0245-0556, J0259-2338, and J0508-2748) shown in this paper.

KW - Gravitational lensing: strong

KW - Methods: statistical

KW - Surveys

KW - Techniques: image processing

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U2 - 10.1093/mnras/sty1419

DO - 10.1093/mnras/sty1419

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EP - 4354

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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ER -

DES meets Gaia: Discovery of strongly lensed quasars from a multiplet search

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