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

Journal Article · · Astronomy and Astrophysics
ORCiD logo [1];  [1];  [1];  [2];  [1];  [3];  [3];  [1];  [4];  [5];  [6];  [7];  [8];  [7];  [9];  [10];  [8];  [11];  [7];  [6] more »;  [12];  [12];  [12];  [13];  [1];  [2];  [14] « less
  1. Ecole Polytechnique Federale de Lausanne (EPFL), Versoix (Switzerland)
  2. Univ. de Valparaiso, Valparaiso (Chile)
  3. Univ. of California, Davis, CA (United States)
  4. Argelander-Institut fur Astronomie, Bonn (Germany)
  5. Max-Planck-Institute for Astrophysics, Garching (Germany)
  6. Univ. Andres Bello Fernandez Concha, Santiago (Chile)
  7. Univ. of California, Los Angeles, CA (United States)
  8. Stanford Univ., Stanford, CA (United States)
  9. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  10. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  11. Max-Planck-Institute for Astrophysics, Garching (Germany); Technische Univ. Munchen, Garching (Germany); Academia Sinica, Taipei (Taiwan)
  12. Pontificia Univ. Catolica de Chile, Santiago (Chile); Max-Planck-Institut fur Astronomie, Heidelberg (Germany)
  13. Univ. Andres Bello Fernandez Concha, Santiago (Chile); Millennium Institute of Astrophysics (Chile)
  14. Univ. de Liege, Liege (Belgium)
+ Show Author Affiliations

Here, 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 2.2m 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 consider the so-called microlensing time delay, a potential source of systematic error so far never directly accounted for in previous time-delay publications. In fifteen years 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.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1439464
Report Number(s):
arXiv:1804.09183; FERMILAB-PUB-18-151-A-AE; 1670070; TRN: US1900617
Journal Information:
Astronomy and Astrophysics, Vol. 616; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (18)

Direct test of the FLRW metric from strongly lensed gravitational wave observations journal August 2019
Impact of the 3D source geometry on time-delay measurements of lensed type-Ia supernovae journal January 2019
COSMOGRAIL: XVIII. time delays of the quadruply lensed quasar WFI2033−4723⋆ journal September 2019
Strong gravitational lensing of explosive transients journal November 2019
The role of multiple images and model priors in measuring H 0 from supernova Refsdal in galaxy cluster MACS J1149.5+2223 journal November 2018
H0LiCOW – IX. Cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 and a new measurement of the Hubble constant journal January 2019
Astrometric requirements for strong lensing time-delay cosmography journal August 2019
A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging journal September 2019
Hubble Constant from LSST Strong-lens Time Delays with Microlensing Systematics journal January 2019
Impact of the 3D source geometry on time-delay measurements of lensed type-Ia Supernovae text January 2018
The role of multiple images and model priors in measuring $H_0$ from supernova Refsdal in galaxy cluster MACS J1149.5+2223 text January 2018
H0LiCOW - IX. Cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 and a new measurement of the Hubble constant text January 2018
Hubble Constant from LSST Strong lens time delays with microlensing systematics text January 2018
Astrometric requirements for strong lensing time-delay cosmography text January 2019
COSMOGRAIL XVIII: time delays of the quadruply lensed quasar WFI2033-4723 text January 2019
A SHARP view of H0LiCOW: $H_{0}$ from three time-delay gravitational lens systems with adaptive optics imaging text January 2019
Strong gravitational lensing of explosive transients text January 2019
Direct test of the FLRW metric from strongly lensed gravitational wave observations text January 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
methods: data analysis
gravitational lensing: strong
cosmological parameters