J/MNRAS/465/4914 R-band light curves of HE 0435-1223 (Bonvin+, 2017)
H0LiCOW. V. New COSMOGRAIL time delays of HE 0435-1223: H0 to 3.8 per cent
precision from strong lensing in a flat-ΛCDM model.
Bonvin V., Courbin F., Suyu S.H., Marshall P.J., Rusu C.E., Sluse D.,
Tewes M., Wong K.C., Collett T., Fassnacht C.D., Treu T., Auger M.W.,
Hilbert S., Koopmans L.V.E., Meylan G., Rumbaugh N., Sonnenfeld A.,
Spiniello C.
<Mon. Not. R. Astron. Soc. 465, 4914 (2017)>
=2017MNRAS.465.4914B 2017MNRAS.465.4914B (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Gravitational lensing ; Photometry
Keywords: gravitational lensing: strong - galaxies: individual: HE 0435-1223 -
cosmology: observations - distance scale
Abstract:
We present the results from thirteen years of optically monitoring the
gravitationally lensed zQSO= 1.693 quasar HE 0435-1223. The R-band
light curves of the four individual images of the quasar were obtained
using deconvolution photometry for a total of 876 epochs. Several
sharp quasar variability features strongly constrain the time delays
between the quasar images. Using two different numerical techniques,
we measured these delays for all possible pairs of quasar images while
always processing the four light curves simultaneously. For both
methods, the delays are compatible with the previous measurements
presented in Courbin et al. (2011, Cat. J/A+A/536/A53) that used a
subset of the present data and a different curve-shifting method. Our
analysis of random and systematic errors accounts in a realistic way
for the observed quasar variability, fluctuating microlensing
magnification over a broad range of temporal scales, noise properties,
and seasonal gaps. Finally, we find that our time-delay measurement
methods yield compatible results when applied to subsets of the data.
Description:
We have been monitoring the quadruply lensed quasar HE 0435-1223 since
December 2003 with different telescopes in the R band (∼600-720nm).
The resulting R-band light curves of the quadruply lensed quasar
HE 0435-1223, is displayed in Fig. 2 of the paper.
The light curves are obtained using deconvolution photometry of images
from 4 different telescopes (the ESO Euler 1.2m, the CTIO SMARTS 1.3m,
the Mercator 1.2m and the Maidanak AZT-22 1.5m), for a total of 876
epochs. Several sharp quasar variability features strongly constrain
the time delays between the quasar images.
Objects:
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RA (2000) DE Designation(s)
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04 38 14.8 -12 17 15 HE 0435-1223 = HE 0435-1223
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig2.dat 82 884 R-band light curves of HE 0435-1223
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See also:
J/A+A/391/481 : R-band photometry of SBS1520+530 (Burud+, 2002)
J/A+A/528/A42 : VRi light curves of the lensed QSO HE 0435-1223 (Ricci+, 2011)
J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011)
J/A+A/544/A51 : Lensed quasar UM673 R-band photometry (Koptelova+, 2012)
J/A+A/551/A104 : Lensed QSO UM673/Q0142-100 VRi light curves (Ricci+, 2013)
J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013)
J/A+A/556/A22 : R-band light curves of RX J1131-1231 (Tewes+, 2013)
Byte-by-byte Description of file: fig2.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d MHJD Modified Julian Date (heliocentric)
13- 21 F9.5 mag magA Relative magnitude of quasar image A
23- 29 F7.5 mag e_magA Magnitude uncertainty of quasar image A
31- 39 F9.5 mag magB Relative magnitude of quasar image B
41- 47 F7.5 mag e_magB Magnitude uncertainty of quasar image B
49- 57 F9.5 mag magC Relative magnitude of quasar image C
59- 65 F7.5 mag e_magC Magnitude uncertainty of quasar image C
67- 74 F8.5 mag magD Relative magnitude of quasar image D
76- 82 F7.5 mag e_magD Magnitude uncertainty of quasar image D
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Acknowledgements:
Vivien Bonvin, vivien.bonvin(at)epfl.ch
(End) Vivien Bonvin [EPFL, Switzerland], Patricia Vannier [CDS] 07-Feb-2017