COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses - IX. Time delays, lens dynamics and baryonic fraction in HE 0435-1223

@article{Courbin2011COSMOGRAILTC,
  title={COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses - IX. Time delays, lens dynamics and baryonic fraction in HE 0435-1223},
  author={Fr{\'e}d{\'e}ric Courbin and Virginie Chantry and Yves Revaz and Dominique Sluse and C{\'e}cile Faure and M. Tewes and Eva Eulaers and M. Koleva and I. M. Asfandiyarov and Simon Dye and Pierre Magain and Hans Van Winckel and Jonathan Coles and Prasenjit Saha and Mansur A. Ibrahimov and Georges Meylan},
  journal={Astronomy and Astrophysics},
  year={2011},
  volume={536}
}
We present accurate time delays for the quadruply imaged quasar HE 0435-1223. The delays were measured from 575 independent photometric points obtained in the R-band between January 2004 and March 2010. With seven years of data, we clearly show that quasar image A is affected by strong microlensing variations and that the time delays are best expressed relative to quasar image B. We measured ΔtBC = 7.8 ± 0.8 days, ΔtBD = -6.5 ± 0.7 days and ΔtCD = -14.3 ± 0.8 days. We spacially deconvolved HST… Expand
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References

SHOWING 1-10 OF 50 REFERENCES
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. VII. Time delays and the Hubble con
Gravitationally lensed quasars can be used to map the mass distribution in lensing galaxies and to estimate the Hubble constant H-0 by measuring the time delays between the quasar images. Here weExpand
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses VIII. Deconvolution of high resolution near-IR images and simple mass models for 7 gravitationally lensed quasars
Aims. We attempt to place very accurate positional constraints on seven gravitationally lensed quasars currently being monitored by the COSMOGRAIL collaboration, and shape parameters for the lightExpand
The time delays of gravitational lens HE 0435-1223 : An early-type galaxy with a rising rotation curve
We present Hubble Space Telescope images and 2 years of optical photometry of the quadruple quasar HE 0435� 1223. The time delays between the intrinsic quasar variations aretAD ¼� 14:37 þ0:75 � 0:85Expand
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses V. The time delay in SDSS J1650+4251 from two seasons of monitoring
Aims. Our aim is to measure the time delay between the two gravitationally lensed images of the z qso  = 1.547 quasar SDSS J1650+4251, in order to estimate the Hubble constant  H 0 . Methods. OurExpand
An optical time-delay for the lensed BAL quasar HE 2149-2745
We present optical V and i-band light curves of the gravitationally lensed BAL quasar HE 2149-2745. The data, obtained with the 1.5 m Danish Telescope (ESO-La Silla) between October 1998 and DecemberExpand
Dissecting the Gravitational lens B1608+656. II. Precision Measurements of the Hubble Constant, Spatial Curvature, and the Dark Energy Equation of State
Strong gravitational lens systems with measured time delays between the multiple images provide a method for measuring the "time-delay distance" to the lens, and thus the Hubble constant. We presentExpand
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. III. Redshift of the lensing galaxy
Aims. The knowledge of the redshift of a lensing galaxy that produces multiple images of a background quasar is essential to any subsequent modeling, whether related to the determination of theExpand
THE EFFECT OF A TIME-VARYING ACCRETION DISK SIZE ON QUASAR MICROLENSING LIGHT CURVES
Microlensing perturbations to the magnification of gravitationally lensed quasar images are dependent on the angular size of the quasar. If quasar variability at visible wavelengths is caused by aExpand
A Determination of H$_0$ with the CLASS Gravitational Lens B1608+656. III. A Significant Improvement in the Precision of the Time Delay Measurements
The gravitational lens CLASS B1608+656 is the only four-image lens system for which all three independent time delays have been measured. This makes the system an excellent candidate for aExpand
HE 0435-1223 : a wide separation quadruple QSO and gravitational lens
We report the discovery of a new gravitationally lensed QSO, at a redshift z = 1.689, with four QSO components in a cross-shaped arrangement around a bright galaxy. The maximum separation betweenExpand
...
1
2
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4
5
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