COSMOGRAIL

XVII. Time delays for the quadruply imaged quasar PG 1115+080

V. Bonvin, J. H.H. Chan, M. Millon, K. Rojas, F. Courbin, G. C.F. Chen, C. D. Fassnacht, E. Paic, M. Tewes, D. C.Y. Chao, M. Chijani, D. Gilman, K. Gilmore, P. Williams, E. Buckley-Geer, J. Frieman, P. J. Marshall, S. H. Suyu, T. Treu, A. Hempel & 7 otros S. Kim, R. Lachaume, M. Rabus, T. Anguita, G. Meylan, V. Motta, P. Magain

Resultado de la investigación: Article

6 Citas (Scopus)

Resumen

We present time-delay estimates for the quadruply imaged quasar PG 1115+080. Our results are based on almost daily observations for seven months at the ESO MPIA 2.2 m telescope at La Silla Observatory, reaching a signal-to-noise ratio of about 1000 per quasar image. In addition, we re-analyze existing light curves from the literature that we complete with an additional three seasons of monitoring with the Mercator telescope at La Palma Observatory. When exploring the possible source of bias we considered the so-called microlensing time delay, a potential source of systematic error so far never directly accounted for in previous time-delay publications. In 15 yr of data on PG 1115+080, we find no strong evidence of microlensing time delay. Therefore not accounting for this effect, our time-delay estimates on the individual data sets are in good agreement with each other and with the literature. Combining the data sets, we obtain the most precise time-delay estimates to date on PG 1115+080, with Δt(AB) = 8.3+1.5 -1.6 days (18.7% precision), Δt(AC) = 9.9+1.1 -1.1 days (11.1%) and Δt(BC) = 18.8+1.6 -1.6 days (8.5%). Turning these time delays into cosmological constraints is done in a companion paper that makes use of ground-based Adaptive Optics (AO) with the Keck telescope.

Idioma originalEnglish
Número de artículoA183
PublicaciónAstronomy and Astrophysics
Volumen616
DOI
EstadoPublished - 11 sep 2018

Huella dactilar

quasars
time lag
telescopes
observatories
estimates
observatory
European Southern Observatory
adaptive optics
systematic errors
signal-to-noise ratio
light curve
alternating current
signal to noise ratios
monitoring

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Bonvin, V., Chan, J. H. H., Millon, M., Rojas, K., Courbin, F., Chen, G. C. F., ... Magain, P. (2018). COSMOGRAIL: XVII. Time delays for the quadruply imaged quasar PG 1115+080. Astronomy and Astrophysics, 616, [A183]. https://doi.org/10.1051/0004-6361/201833287
Bonvin, V. ; Chan, J. H.H. ; Millon, M. ; Rojas, K. ; Courbin, F. ; Chen, G. C.F. ; Fassnacht, C. D. ; Paic, E. ; Tewes, M. ; Chao, D. C.Y. ; Chijani, M. ; Gilman, D. ; Gilmore, K. ; Williams, P. ; Buckley-Geer, E. ; Frieman, J. ; Marshall, P. J. ; Suyu, S. H. ; Treu, T. ; Hempel, A. ; Kim, S. ; Lachaume, R. ; Rabus, M. ; Anguita, T. ; Meylan, G. ; Motta, V. ; Magain, P. / COSMOGRAIL : XVII. Time delays for the quadruply imaged quasar PG 1115+080. En: Astronomy and Astrophysics. 2018 ; Vol. 616.
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title = "COSMOGRAIL: XVII. Time delays for the quadruply imaged quasar PG 1115+080",
abstract = "We present time-delay estimates for the quadruply imaged quasar PG 1115+080. Our results are based on almost daily observations for seven months at the ESO MPIA 2.2 m telescope at La Silla Observatory, reaching a signal-to-noise ratio of about 1000 per quasar image. In addition, we re-analyze existing light curves from the literature that we complete with an additional three seasons of monitoring with the Mercator telescope at La Palma Observatory. When exploring the possible source of bias we considered the so-called microlensing time delay, a potential source of systematic error so far never directly accounted for in previous time-delay publications. In 15 yr of data on PG 1115+080, we find no strong evidence of microlensing time delay. Therefore not accounting for this effect, our time-delay estimates on the individual data sets are in good agreement with each other and with the literature. Combining the data sets, we obtain the most precise time-delay estimates to date on PG 1115+080, with Δt(AB) = 8.3+1.5 -1.6 days (18.7{\%} precision), Δt(AC) = 9.9+1.1 -1.1 days (11.1{\%}) and Δt(BC) = 18.8+1.6 -1.6 days (8.5{\%}). Turning these time delays into cosmological constraints is done in a companion paper that makes use of ground-based Adaptive Optics (AO) with the Keck telescope.",
keywords = "Cosmological parameters, Gravitational lensing: strong, Methods: data analysis",
author = "V. Bonvin and Chan, {J. H.H.} and M. Millon and K. Rojas and F. Courbin and Chen, {G. C.F.} and Fassnacht, {C. D.} and E. Paic and M. Tewes and Chao, {D. C.Y.} and M. Chijani and D. Gilman and K. Gilmore and P. Williams and E. Buckley-Geer and J. Frieman and Marshall, {P. J.} and Suyu, {S. H.} and T. Treu and A. Hempel and S. Kim and R. Lachaume and M. Rabus and T. Anguita and G. Meylan and V. Motta and P. Magain",
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Bonvin, V, Chan, JHH, Millon, M, Rojas, K, Courbin, F, Chen, GCF, Fassnacht, CD, Paic, E, Tewes, M, Chao, DCY, Chijani, M, Gilman, D, Gilmore, K, Williams, P, Buckley-Geer, E, Frieman, J, Marshall, PJ, Suyu, SH, Treu, T, Hempel, A, Kim, S, Lachaume, R, Rabus, M, Anguita, T, Meylan, G, Motta, V & Magain, P 2018, 'COSMOGRAIL: XVII. Time delays for the quadruply imaged quasar PG 1115+080', Astronomy and Astrophysics, vol. 616, A183. https://doi.org/10.1051/0004-6361/201833287

COSMOGRAIL : XVII. Time delays for the quadruply imaged quasar PG 1115+080. / Bonvin, V.; Chan, J. H.H.; Millon, M.; Rojas, K.; Courbin, F.; Chen, G. C.F.; Fassnacht, C. D.; Paic, E.; Tewes, M.; Chao, D. C.Y.; Chijani, M.; Gilman, D.; Gilmore, K.; Williams, P.; Buckley-Geer, E.; Frieman, J.; Marshall, P. J.; Suyu, S. H.; Treu, T.; Hempel, A.; Kim, S.; Lachaume, R.; Rabus, M.; Anguita, T.; Meylan, G.; Motta, V.; Magain, P.

En: Astronomy and Astrophysics, Vol. 616, A183, 11.09.2018.

Resultado de la investigación: Article

TY - JOUR

T1 - COSMOGRAIL

T2 - XVII. Time delays for the quadruply imaged quasar PG 1115+080

AU - Bonvin, V.

AU - Chan, J. H.H.

AU - Millon, M.

AU - Rojas, K.

AU - Courbin, F.

AU - Chen, G. C.F.

AU - Fassnacht, C. D.

AU - Paic, E.

AU - Tewes, M.

AU - Chao, D. C.Y.

AU - Chijani, M.

AU - Gilman, D.

AU - Gilmore, K.

AU - Williams, P.

AU - Buckley-Geer, E.

AU - Frieman, J.

AU - Marshall, P. J.

AU - Suyu, S. H.

AU - Treu, T.

AU - Hempel, A.

AU - Kim, S.

AU - Lachaume, R.

AU - Rabus, M.

AU - Anguita, T.

AU - Meylan, G.

AU - Motta, V.

AU - Magain, P.

PY - 2018/9/11

Y1 - 2018/9/11

N2 - We present time-delay estimates for the quadruply imaged quasar PG 1115+080. Our results are based on almost daily observations for seven months at the ESO MPIA 2.2 m telescope at La Silla Observatory, reaching a signal-to-noise ratio of about 1000 per quasar image. In addition, we re-analyze existing light curves from the literature that we complete with an additional three seasons of monitoring with the Mercator telescope at La Palma Observatory. When exploring the possible source of bias we considered the so-called microlensing time delay, a potential source of systematic error so far never directly accounted for in previous time-delay publications. In 15 yr of data on PG 1115+080, we find no strong evidence of microlensing time delay. Therefore not accounting for this effect, our time-delay estimates on the individual data sets are in good agreement with each other and with the literature. Combining the data sets, we obtain the most precise time-delay estimates to date on PG 1115+080, with Δt(AB) = 8.3+1.5 -1.6 days (18.7% precision), Δt(AC) = 9.9+1.1 -1.1 days (11.1%) and Δt(BC) = 18.8+1.6 -1.6 days (8.5%). Turning these time delays into cosmological constraints is done in a companion paper that makes use of ground-based Adaptive Optics (AO) with the Keck telescope.

AB - We present time-delay estimates for the quadruply imaged quasar PG 1115+080. Our results are based on almost daily observations for seven months at the ESO MPIA 2.2 m telescope at La Silla Observatory, reaching a signal-to-noise ratio of about 1000 per quasar image. In addition, we re-analyze existing light curves from the literature that we complete with an additional three seasons of monitoring with the Mercator telescope at La Palma Observatory. When exploring the possible source of bias we considered the so-called microlensing time delay, a potential source of systematic error so far never directly accounted for in previous time-delay publications. In 15 yr of data on PG 1115+080, we find no strong evidence of microlensing time delay. Therefore not accounting for this effect, our time-delay estimates on the individual data sets are in good agreement with each other and with the literature. Combining the data sets, we obtain the most precise time-delay estimates to date on PG 1115+080, with Δt(AB) = 8.3+1.5 -1.6 days (18.7% precision), Δt(AC) = 9.9+1.1 -1.1 days (11.1%) and Δt(BC) = 18.8+1.6 -1.6 days (8.5%). Turning these time delays into cosmological constraints is done in a companion paper that makes use of ground-based Adaptive Optics (AO) with the Keck telescope.

KW - Cosmological parameters

KW - Gravitational lensing: strong

KW - Methods: data analysis

UR - http://www.scopus.com/inward/record.url?scp=85053543477&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201833287

DO - 10.1051/0004-6361/201833287

M3 - Article

VL - 616

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A183

ER -

Bonvin V, Chan JHH, Millon M, Rojas K, Courbin F, Chen GCF y otros. COSMOGRAIL: XVII. Time delays for the quadruply imaged quasar PG 1115+080. Astronomy and Astrophysics. 2018 sep 11;616. A183. https://doi.org/10.1051/0004-6361/201833287