2018A&A...616A.183B


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.27CET14:06:48

2018A&A...616A.183B - Astronomy and Astrophysics, volume 616A, 183-183 (2018/8-1)

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. and MAGAIN P.

Abstract (from CDS):

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 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 15yr 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+1.5–1.6days (18.7% precision), Δt(AC)=9.9+1.1–1.1days (11.1%) and Δt(BC)=18.8+1.6–1.6days (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.

Abstract Copyright: © ESO 2018

Journal keyword(s): methods: data analysis - gravitational lensing: strong - cosmological parameters

VizieR on-line data: <Available at CDS (J/A+A/616/A183): fig2.dat>

CDS comments: Fig.1 objects PSF N and NN not identified.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 DES J0408-5354 gLS 04 08 21.70 -53 53 59.6           ~ 8 0
2 [VV2006] J043814.8-122314 QSO 04 38 14.88 -12 17 14.6     17.15     ~ 160 2
3 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 607 2
4 [YDG81] QSO 1115+080 A1 LeI 11 18 17.09 +07 45 55.7           ~ 44 0
5 [YDG81] QSO 1115+080 A2 LeI 11 18 17.10 +07 45 56.1           ~ 42 0

    Equat.    Gal    SGal    Ecl

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2020.01.27-14:06:48

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