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Title: COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723

Abstract

We present new measurements of the time delays of WFI2033-4723. The data sets used in this work include 14 years of data taken at the 1.2m Leonhard Euler Swiss telescope, 13 years of data from the SMARTS 1.3m telescope at Las Campanas Observatory and a single year of high-cadence and high-precision monitoring at the MPIA 2.2m telescope. The time delays measured from these different data sets, all taken in the R-band, are in good agreement with each other and with previous measurements from the literature. Combining all the time-delay estimates from our data sets results in Dt_AB = 36.2-0.8+0.7 days (2.1% precision), Dt_AC = -23.3-1.4+1.2 days (5.6%) and Dt_BC = -59.4-1.3+1.3 days (2.2%). In addition, the close image pair A1-A2 of the lensed quasars can be resolved in the MPIA 2.2m data. We measure a time delay consistent with zero in this pair of images. We also explore the prior distributions of microlensing time-delay potentially affecting the cosmological time-delay measurements of WFI2033-4723. There is however no strong indication in our measurements that microlensing time delay is neither present nor absent. This work is part of a H0LiCOW series focusing on measuring the Hubble constant from WFI2033-4723.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
HOLiCOW
OSTI Identifier:
1571812
Report Number(s):
arXiv:1905.08260; FERMILAB-PUB-19-519-A-SCD
oai:inspirehep.net:1735831
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Astron.Astrophys.
Additional Journal Information:
Journal Volume: 629
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Bonvin, V., and et al. COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723. United States: N. p., 2019. Web. doi:10.1051/0004-6361/201935921.
Bonvin, V., & et al. COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723. United States. doi:10.1051/0004-6361/201935921.
Bonvin, V., and et al. Sun . "COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723". United States. doi:10.1051/0004-6361/201935921. https://www.osti.gov/servlets/purl/1571812.
@article{osti_1571812,
title = {COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723},
author = {Bonvin, V. and et al.},
abstractNote = {We present new measurements of the time delays of WFI2033-4723. The data sets used in this work include 14 years of data taken at the 1.2m Leonhard Euler Swiss telescope, 13 years of data from the SMARTS 1.3m telescope at Las Campanas Observatory and a single year of high-cadence and high-precision monitoring at the MPIA 2.2m telescope. The time delays measured from these different data sets, all taken in the R-band, are in good agreement with each other and with previous measurements from the literature. Combining all the time-delay estimates from our data sets results in Dt_AB = 36.2-0.8+0.7 days (2.1% precision), Dt_AC = -23.3-1.4+1.2 days (5.6%) and Dt_BC = -59.4-1.3+1.3 days (2.2%). In addition, the close image pair A1-A2 of the lensed quasars can be resolved in the MPIA 2.2m data. We measure a time delay consistent with zero in this pair of images. We also explore the prior distributions of microlensing time-delay potentially affecting the cosmological time-delay measurements of WFI2033-4723. There is however no strong indication in our measurements that microlensing time delay is neither present nor absent. This work is part of a H0LiCOW series focusing on measuring the Hubble constant from WFI2033-4723.},
doi = {10.1051/0004-6361/201935921},
journal = {Astron.Astrophys.},
number = ,
volume = 629,
place = {United States},
year = {2019},
month = {9}
}

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