J/A+A/556/A22 R-band light curves of RX J1131-1231 (Tewes+, 2013)
COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses.
XIII. Time delays and 9-yr optical monitoring of the lensed quasar RX J1131-1231
Tewes M., Courbin F., Meylan G., Kochanek C.S., Eulaers E., Cantale N.,
Mosquera A.M., Magain P., Van Winckel H., Sluse D., Cataldi G., Voros D,
Dye S.
<Astron. Astrophys. 556, A22 (2013)>
=2013A&A...556A..22T 2013A&A...556A..22T
ADC_Keywords: QSOs ; Gravitational lensing ; Photometry
Keywords: gravitational lensing: strong - cosmological parameters -
quasars: individual: RX J1131-1231
Abstract:
We present the results from nine years of optically monitoring the
gravitationally lensed zQSO=0.658 quasar RX J1131-1231. The R-band
light curves of the four individual images of the quasar were obtained
using deconvolution photometry for a total of 707 epochs. Several
sharp quasar variability features strongly constrain the time delays
between the quasar images. Using three different numerical techniques,
we measured these delays for all possible pairs of quasar images while
always processing the four light curves simultaneously. For all three
methods, the delays between the three close images A, B, and C are
compatible with being 0, while we measured the delay of image D to be
91 days, with a fractional uncertainty of 1.5% (1σ), including
systematic errors. 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 RX J1131-1231
since December 2003 with different telescopes in the R band
(∼600-720nm). The resulting R-band light curves of the quadruply
lensed quasar RX J1131-1231, is displayed in Fig. 4 of the paper.
The light curves are obtained using deconvolution photometry of images
from 3 different telescopes (the ESO Euler 1.2m, the CTIO SMARTS 1.3m
and the Mercator 1.2m), for a total of 707 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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11 31 52 -12 31 59 RX J1131-1231 = 1RXS J113151.6-123158
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig4.dat 86 707 R-band light curves of RX J1131-1231
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See also:
J/A+A/391/481 : R-band photometry of SBS1520+530 (Burud+, 2002)
J/A+A/433/757 : Optical polarization of 203 QSOs (Sluse+, 2005)
J/AJ/132/999 : SDSS quasar lens search (Oguri+, 2006)
J/A+A/488/481 : Time delays and H0 from WFI J2033-4723 (Vuissoz+, 2008)
J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011)
J/A+A/528/A42 : VRi light curves of the lensed QSO HE 0435-1223 (Ricci+, 2011)
J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013)
Byte-by-byte Description of file: fig4.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Julian Date (heliocentric)
15- 21 F7.5 mag Amag Relative magnitude of quasar image A
23- 29 F7.5 mag e_Amag Magnitude uncertainty of quasar image A
31- 37 F7.5 mag Bmag Relative magnitude of quasar image B
39- 45 F7.5 mag e_Bmag Magnitude uncertainty of quasar image B
47- 53 F7.5 mag Cmag Relative magnitude of quasar image C
55- 61 F7.5 mag e_Cmag Magnitude uncertainty of quasar image C
63- 69 F7.5 mag Dmag Relative magnitude of quasar image D
71- 77 F7.5 mag e_Dmag Magnitude uncertainty of quasar image D
79- 86 A8 --- Tel Telescope used: EulerC2, EulerCAM, Mercator
or SMARTS (1)
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Note (1): Telescopes are:
EulerC2 = 1.2m Swiss telescope at ESO/La Silla, Chile (before 2010-Sep)
EulerCAM = 1.2m Swiss telescope at ESO/La Silla, Chile (after 2010-Sep)
SMARTS = 1.3m telescope at Las Campanas, Chile
Mercator = 1.2m telescope at La Palma Island
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Acknowledgements:
Malte Tewes, malte.tewes(at)epfl.ch
References:
Eigenbrod et al., Paper I 2005A&A...436...25E 2005A&A...436...25E
Eigenbrod et al., Paper II 2006A&A...451..747E 2006A&A...451..747E
Eigenbrod et al., Paper III 2006A&A...451..759E 2006A&A...451..759E
Saha et al., Paper IV 2006A&A...450..461S 2006A&A...450..461S
Vuissoz et al., Paper V 2007A&A...464..845V 2007A&A...464..845V
Eigenbrod et al., Paper VI 2007A&A...465...51E 2007A&A...465...51E
Vuissoz et al., Paper VII 2008A&A...488..481V 2008A&A...488..481V, Cat. J/A+A/488/481
Chantry et al., Paper VIII 2010A&A...522A..95C 2010A&A...522A..95C
Courbin et al., Paper IX 2011A&A...536A..53C 2011A&A...536A..53C, Cat. J/A+A/536/A53
Sluse et al., Paper X 2012A&A...538A..99S 2012A&A...538A..99S
Tewes et al., Paper XI 2013A&A...553A.120T 2013A&A...553A.120T
Eulaers et al., Paper XII 2013A&A...553A.121E 2013A&A...553A.121E, Cat. J/A+A/553/A121
(End) Malte Tewes [EPFL, Switzerland], Patricia Vannier [CDS] 18-Jun-2013