COSMOGRAIL: The cosmological monitoring of gravitational lenses

F. Courbin; V. Bonvin; E. Buckley-Geer; C. D. Fassnacht; J. Frieman; H. Lin; P. J. Marshall; S. H. Suyu; T. Treu; T. Anguita; V. Motta; G. Meylan; E. Paic; M. Tewes; A. Agnello; D. C.Y. Chao; M. Chijani; D. Gilman; K. Rojas; P. Williams; A. Hempel; S. Kim; R. Lachaume; M. Rabus; T. M.C. Abbott; S. Allam; J. Annis; M. Banerji; K. Bechtol; A. Benoit-Lévy; D. Brooks; D. L. Burke; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; C. B. D'Andrea; L. N. Da Costa; C. Davis; D. L. Depoy; S. Desai; B. Flaugher; P. Fosalba; J. García-Bellido; E. Gaztanaga; D. A. Goldstein; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; K. Honscheid; D. J. James; K. Kuehn; S. Kuhlmann; N. Kuropatkin; O. Lahav; M. Lima; M. A.G. Maia; M. March; J. L. Marshall; R. G. McMahon; F. Menanteau; R. Miquel; B. Nord; A. A. Plazas; E. Sanchez; V. Scarpine; R. Schindler; M. Schubnell; I. Sevilla-Noarbe; M. Smith; M. Soares-Santos; F. Sobreira; E. Suchyta; G. Tarle; D. L. Tucker; A. R. Walker; W. Wester

doi:10.1051/0004-6361/201731461

COSMOGRAIL: The cosmological monitoring of gravitational lenses

F. Courbin, V. Bonvin, E. Buckley-Geer, C. D. Fassnacht, J. Frieman, H. Lin, P. J. Marshall, S. H. Suyu, T. Treu, T. Anguita, V. Motta, G. Meylan, E. Paic, M. Tewes, A. Agnello, D. C.Y. Chao, M. Chijani, D. Gilman, K. Rojas, P. WilliamsA. Hempel, S. Kim, R. Lachaume, M. Rabus, T. M.C. Abbott, S. Allam, J. Annis, M. Banerji, K. Bechtol, A. Benoit-Lévy, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, C. B. D'Andrea, L. N. Da Costa, C. Davis, D. L. Depoy, S. Desai, B. Flaugher, P. Fosalba, J. García-Bellido, E. Gaztanaga, D. A. Goldstein, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, K. Honscheid, D. J. James, K. Kuehn, S. Kuhlmann, N. Kuropatkin, O. Lahav, M. Lima, M. A.G. Maia, M. March, J. L. Marshall, R. G. McMahon, F. Menanteau, R. Miquel, B. Nord, A. A. Plazas, E. Sanchez, V. Scarpine, R. Schindler, M. Schubnell, I. Sevilla-Noarbe, M. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, G. Tarle, D. L. Tucker, A. R. Walker, W. Wester

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Abstract

© ESO, 2018. We present time-delay measurements for the new quadruple imaged quasar DES J04085354, the first quadruple imaged quasar found in the Dark Energy Survey (DES). Our result is made possible by implementing a new observational strategy using almost daily observations with the MPIA 2.2 m telescope at La Silla observatory and deep exposures reaching a signal-to-noise ratio of about 1000 per quasar image. This data qualityallows us to catch small photometric variations (a few mmag rms) of the quasar, acting on temporal scales much shorter than microlensing, and hence making the time delay measurement very robust against microlensing. In only seven months we very accurately measured one of the time delays in DES J04085354: - "t(AB) = 112.1 ± 2.1 days (1.8%) using only the MPIA 2.2 m data. In combination with data taken with the 1.2 m Euler Swiss telescope, we also measured two delays involving the D component of the system - "t(AD) = ± 12.8 days (8.2%) and - "t(BD) = 42.4 ± 17.6 days (41%), where all the error bars include systematics. Turning these time delays into cosmological constraints will require deep Hubble Space Telescope (HST) imaging or ground-based adaptive optics (AO), and information on the velocity field of the lensing galaxy.

Original language	English
Article number	A71
Journal	Astronomy and Astrophysics
Volume	609
DOIs	https://doi.org/10.1051/0004-6361/201731461
Publication status	Published - 1 Jan 2018

Keywords

cosmological parameters
data analysis
gravitational lensing
methods
strong

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10.1051/0004-6361/201731461

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Courbin, F., Bonvin, V., Buckley-Geer, E., Fassnacht, C. D., Frieman, J., Lin, H., Marshall, P. J., Suyu, S. H., Treu, T., Anguita, T., Motta, V., Meylan, G., Paic, E., Tewes, M., Agnello, A., Chao, D. C. Y., Chijani, M., Gilman, D., Rojas, K., ... Wester, W. (2018). COSMOGRAIL: The cosmological monitoring of gravitational lenses. Astronomy and Astrophysics, 609, [A71]. https://doi.org/10.1051/0004-6361/201731461

@article{93275dba2bc84420a023a2f054f5a155,

title = "COSMOGRAIL: The cosmological monitoring of gravitational lenses",

abstract = "{\textcopyright} ESO, 2018. We present time-delay measurements for the new quadruple imaged quasar DES J04085354, the first quadruple imaged quasar found in the Dark Energy Survey (DES). Our result is made possible by implementing a new observational strategy using almost daily observations with the MPIA 2.2 m telescope at La Silla observatory and deep exposures reaching a signal-to-noise ratio of about 1000 per quasar image. This data qualityallows us to catch small photometric variations (a few mmag rms) of the quasar, acting on temporal scales much shorter than microlensing, and hence making the time delay measurement very robust against microlensing. In only seven months we very accurately measured one of the time delays in DES J04085354: - {"}t(AB) = 112.1 ± 2.1 days (1.8%) using only the MPIA 2.2 m data. In combination with data taken with the 1.2 m Euler Swiss telescope, we also measured two delays involving the D component of the system - {"}t(AD) = ± 12.8 days (8.2%) and - {"}t(BD) = 42.4 ± 17.6 days (41%), where all the error bars include systematics. Turning these time delays into cosmological constraints will require deep Hubble Space Telescope (HST) imaging or ground-based adaptive optics (AO), and information on the velocity field of the lensing galaxy.",

keywords = "cosmological parameters, data analysis, gravitational lensing, methods, strong",

author = "F. Courbin and V. Bonvin and E. Buckley-Geer and Fassnacht, {C. D.} and J. Frieman and H. Lin and Marshall, {P. J.} and Suyu, {S. H.} and T. Treu and T. Anguita and V. Motta and G. Meylan and E. Paic and M. Tewes and A. Agnello and Chao, {D. C.Y.} and M. Chijani and D. Gilman and K. Rojas and P. Williams and A. Hempel and S. Kim and R. Lachaume and M. Rabus and Abbott, {T. M.C.} and S. Allam and J. Annis and M. Banerji and K. Bechtol and A. Benoit-L{\'e}vy and D. Brooks and Burke, {D. L.} and {Carnero Rosell}, A. and {Carrasco Kind}, M. and J. Carretero and D'Andrea, {C. B.} and {Da Costa}, {L. N.} and C. Davis and Depoy, {D. L.} and S. Desai and B. Flaugher and P. Fosalba and J. Garc{\'i}a-Bellido and E. Gaztanaga and Goldstein, {D. A.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and K. Honscheid and James, {D. J.} and K. Kuehn and S. Kuhlmann and N. Kuropatkin and O. Lahav and M. Lima and Maia, {M. A.G.} and M. March and Marshall, {J. L.} and McMahon, {R. G.} and F. Menanteau and R. Miquel and B. Nord 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 G. Tarle and Tucker, {D. L.} and Walker, {A. R.} and W. Wester",

year = "2018",

month = jan,

day = "1",

doi = "10.1051/0004-6361/201731461",

language = "English",

volume = "609",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

}

Courbin, F, Bonvin, V, Buckley-Geer, E, Fassnacht, CD, Frieman, J, Lin, H, Marshall, PJ, Suyu, SH, Treu, T, Anguita, T, Motta, V, Meylan, G, Paic, E, Tewes, M, Agnello, A, Chao, DCY, Chijani, M, Gilman, D, Rojas, K, Williams, P, Hempel, A, Kim, S, Lachaume, R, Rabus, M, Abbott, TMC, Allam, S, Annis, J, Banerji, M, Bechtol, K, Benoit-Lévy, A, Brooks, D, Burke, DL, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, D'Andrea, CB, Da Costa, LN, Davis, C, Depoy, DL, Desai, S, Flaugher, B, Fosalba, P, García-Bellido, J, Gaztanaga, E, Goldstein, DA, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Honscheid, K, James, DJ, Kuehn, K, Kuhlmann, S, Kuropatkin, N, Lahav, O, Lima, M, Maia, MAG, March, M, Marshall, JL, McMahon, RG, Menanteau, F, Miquel, R, Nord, B, Plazas, AA, Sanchez, E, Scarpine, V, Schindler, R, Schubnell, M, Sevilla-Noarbe, I, Smith, M, Soares-Santos, M, Sobreira, F, Suchyta, E, Tarle, G, Tucker, DL, Walker, AR & Wester, W 2018, 'COSMOGRAIL: The cosmological monitoring of gravitational lenses', Astronomy and Astrophysics, vol. 609, A71. https://doi.org/10.1051/0004-6361/201731461

TY - JOUR

T1 - COSMOGRAIL: The cosmological monitoring of gravitational lenses

AU - Courbin, F.

AU - Bonvin, V.

AU - Buckley-Geer, E.

AU - Fassnacht, C. D.

AU - Frieman, J.

AU - Lin, H.

AU - Marshall, P. J.

AU - Suyu, S. H.

AU - Treu, T.

AU - Anguita, T.

AU - Motta, V.

AU - Meylan, G.

AU - Paic, E.

AU - Tewes, M.

AU - Agnello, A.

AU - Chao, D. C.Y.

AU - Chijani, M.

AU - Gilman, D.

AU - Rojas, K.

AU - Williams, P.

AU - Hempel, A.

AU - Kim, S.

AU - Lachaume, R.

AU - Rabus, M.

AU - Abbott, T. M.C.

AU - Allam, S.

AU - Annis, J.

AU - Banerji, M.

AU - Bechtol, K.

AU - Benoit-Lévy, A.

AU - Brooks, D.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - D'Andrea, C. B.

AU - Da Costa, L. N.

AU - Davis, C.

AU - Depoy, D. L.

AU - Desai, S.

AU - Flaugher, B.

AU - Fosalba, P.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Goldstein, D. A.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Honscheid, K.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuhlmann, S.

AU - Kuropatkin, N.

AU - Lahav, O.

AU - Lima, M.

AU - Maia, M. A.G.

AU - March, M.

AU - Marshall, J. L.

AU - McMahon, R. G.

AU - Menanteau, F.

AU - Miquel, R.

AU - Nord, B.

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 - Tarle, G.

AU - Tucker, D. L.

AU - Walker, A. R.

AU - Wester, W.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - © ESO, 2018. We present time-delay measurements for the new quadruple imaged quasar DES J04085354, the first quadruple imaged quasar found in the Dark Energy Survey (DES). Our result is made possible by implementing a new observational strategy using almost daily observations with the MPIA 2.2 m telescope at La Silla observatory and deep exposures reaching a signal-to-noise ratio of about 1000 per quasar image. This data qualityallows us to catch small photometric variations (a few mmag rms) of the quasar, acting on temporal scales much shorter than microlensing, and hence making the time delay measurement very robust against microlensing. In only seven months we very accurately measured one of the time delays in DES J04085354: - "t(AB) = 112.1 ± 2.1 days (1.8%) using only the MPIA 2.2 m data. In combination with data taken with the 1.2 m Euler Swiss telescope, we also measured two delays involving the D component of the system - "t(AD) = ± 12.8 days (8.2%) and - "t(BD) = 42.4 ± 17.6 days (41%), where all the error bars include systematics. Turning these time delays into cosmological constraints will require deep Hubble Space Telescope (HST) imaging or ground-based adaptive optics (AO), and information on the velocity field of the lensing galaxy.

AB - © ESO, 2018. We present time-delay measurements for the new quadruple imaged quasar DES J04085354, the first quadruple imaged quasar found in the Dark Energy Survey (DES). Our result is made possible by implementing a new observational strategy using almost daily observations with the MPIA 2.2 m telescope at La Silla observatory and deep exposures reaching a signal-to-noise ratio of about 1000 per quasar image. This data qualityallows us to catch small photometric variations (a few mmag rms) of the quasar, acting on temporal scales much shorter than microlensing, and hence making the time delay measurement very robust against microlensing. In only seven months we very accurately measured one of the time delays in DES J04085354: - "t(AB) = 112.1 ± 2.1 days (1.8%) using only the MPIA 2.2 m data. In combination with data taken with the 1.2 m Euler Swiss telescope, we also measured two delays involving the D component of the system - "t(AD) = ± 12.8 days (8.2%) and - "t(BD) = 42.4 ± 17.6 days (41%), where all the error bars include systematics. Turning these time delays into cosmological constraints will require deep Hubble Space Telescope (HST) imaging or ground-based adaptive optics (AO), and information on the velocity field of the lensing galaxy.

KW - cosmological parameters

KW - data analysis

KW - gravitational lensing

KW - methods

KW - strong

U2 - 10.1051/0004-6361/201731461

DO - 10.1051/0004-6361/201731461

M3 - Article

VL - 609

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A71

ER -

COSMOGRAIL: The cosmological monitoring of gravitational lenses

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