J/ApJ/869/106 SMARTS & Euler R-band monitoring of WFI J2033-4723 (Morgan+, 2018)
Accretion disk size measurement and time delays in the lensed quasar
WFI 2033-4723.
Morgan C.W., Hyer G.E., Bonvin V., Mosquera A.M., Cornachione M.,
Courbin F., Kochanek C.S., Falco E.E.
<Astrophys. J., 869, 106-106 (2018)>
=2018ApJ...869..106M 2018ApJ...869..106M (SIMBAD/NED BibCode)
ADC_Keywords: QSOs; Gravitational lensing; Photometry, RI
Keywords: accretion, accretion disks; gravitational lensing: micro;
gravitational lensing: strong; quasars: individual: WFI 2033-4723
Abstract:
We present 13 seasons of R-band photometry of the quadruply lensed
quasar WFI J2033-4723 from the 1.3m SMARTS telescope at CTIO and the
1.2m Euler Swiss Telescope at La Silla, in which we detect
microlensing variability of ∼0.2mag on a timescale of ∼6yrs. Using a
Bayesian Monte Carlo technique, we analyze the microlensing signal to
obtain a measurement of the size of this system's accretion disk of
log(rs/cm)=15.86-0.27+0.25 at λrest=2481Å, assuming
a 60° inclination angle. We confirm previous measurements of the
BC and AB time delays, and we obtain a tentative measurement of the
delay between the closely spaced A1 and A2 images of
ΔtA1A2=tA1-tA2=-3.9-2.2+3.4d. We conclude with an
update to the Quasar Accretion Disk Size-Black Hole Mass Relation, in
which we confirm that the accretion disk size predictions from simple
thin disk theory are too small.
Description:
We observed WFI J2033-4723 in the V- (F555W), I- (F814W), and H-
(F160W) bands using the Hubble Space Telescope (HST) as an element of
the the CfA-Arizona Space Telescope Survey (CASTLES;
Lehar+ 2000ApJ...536..584L 2000ApJ...536..584L).
In this paper, we combine 9 new seasons of WFI2033 monitoring data
with the 4 seasons of data from Vuissoz+ (2008, J/A+A/488/481) to
create a 13-season set of light curves.
The CTIO 1.3m SMARTS/ANDICAM data set consists of 117 epochs between
2004 March and 2017 August, in R-band (effective wavelength of 658nm).
The new 1.2m EULER/EulerCAM data set consists of 178 epochs between
2010 October and 2016 December, in the "RG" (Rouge Geneve) filter
(broad Gunn R filter with an effective wavelength of 660nm).
Both the EULER and SMARTS images are characterized by a median stellar
FWHM (seeing) of 1.2".
Objects:
------------------------------------------------------------------------
RA (ICRS) DE Designation(s)
------------------------------------------------------------------------
20 33 42.12 -47 23 43.9 WFI J2033-4723 = [MCS2004b] WFI J2033-4723
------------------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 68 119 WFI J2033-4723 light curves - SMARTS
table3.dat 67 178 WFI J2033-4723 light curves - EULER
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See also:
J/ApJ/660/146 : HE 1104-1805 differential light curves (Poindexter+, 2007)
J/A+A/488/481 : Time delays and H0 from WFI J2033-4723 (Vuissoz+, 2008)
J/A+A/544/A62 : Spectra of 13 lensed quasars (Sluse+, 2012)
J/ApJ/756/52 : R-band light curve of QSO J0158-4325 images (Morgan+, 2012)
J/ApJ/806/258 : Optical LCs of QSO J0924+0219 lensed quasar (MacLeod+, 2015)
J/MNRAS/465/4914 : R-band light curves of HE 0435-1223 (Bonvin+, 2017)
J/ApJ/840/41 : X-ray/UV Swift monitoring of NGC 4151 (Edelson+, 2017)
J/ApJ/854/107 : Light curves of 2 Seyfert 1 galaxies (Fausnaugh+, 2018)
J/A+A/618/A56 : Gaia GraL. II. Known multiply imaged QSOs (Ducourant+, 2018)
J/A+A/622/A165 : Gaia GraL. III. New lensed systems (Delchambre+, 2019)
J/A+A/629/A97 : Quadruply lensed quasar WFI2033-4723 LCs (Bonvin+, 2019)
http://cfa.harvard.edu/castles/ : CfA-Arizona Space Telescope LEns Survey
(CASTLES home page)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 d HJD [3082.8/7914.8] Heliocentric Julian Day;
HJD-2450000
10- 14 F5.3 mag A1 [2.3/3.1] Component A1 1.3m SMARTS/ANDICAM R band
magnitude (1)
16- 20 F5.3 mag e_A1 [0.01/0.05] Uncertainty in A1
22- 26 F5.3 mag A2 [3/3.7] Component A2 1.3m SMARTS/ANDICAM R band
magnitude (1)
28- 32 F5.3 mag e_A2 [0.01/0.09] Uncertainty in A2
34- 38 F5.3 mag B [2.9/3.7] Component B 1.3m SMARTS/ANDICAM R band
magnitude (1)
40- 44 F5.3 mag e_B [0.01/0.04] Uncertainty in B
46- 50 F5.3 mag C [3.3/3.9] Component C 1.3m SMARTS/ANDICAM R band
magnitude (1)
52- 56 F5.3 mag e_C [0.01/0.06] Uncertainty in C
58- 61 F4.1 --- chi2 [0.3/11.8] Goodness of fit (G1)
63- 68 A6 --- Tel Telescope (SMARTS)
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Note (1): The Image A1-C columns give the magnitudes of the quasar images
relative to the comparison stars. The SMARTS/ANDICAM R band has an
effective wavelength of 658nm.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 d HJD [5485.6/7696.6] Heliocentric Julian Day;
HJD-2450000
10- 14 F5.3 mag A1 [2.3/3] Component A1 1.2m Euler/EulerCAM RG band
magnitude (1)
16- 20 F5.3 mag e_A1 [0.001/0.02] Uncertainty in A1
22- 26 F5.3 mag A2 [3.2/3.7] Component A2 1.2m Euler/EulerCAM RG band
magnitude (1)
28- 32 F5.3 mag e_A2 [0.001/0.04] Uncertainty in A2
34- 38 F5.3 mag B [3/3.7] Component B 1.2m Euler/EulerCAM RG band
magnitude (1)
40- 44 F5.3 mag e_B [0.001/0.02] Uncertainty in B
46- 50 F5.3 mag C [3.4/4] Component C 1.2m Euler/EulerCAM RG band
magnitude (1)
52- 56 F5.3 mag e_C [0.001/0.03] Uncertainty in C
58- 61 F4.1 --- chi2 [0.8/22] Goodness of fit (G1)
63- 67 A5 --- Tel Telescope (EULER)
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Note (1): The Image A1-C columns give the magnitudes of the quasar images
relative to the comparison stars. The Euler/EulerCAM 'RG' or 'Rouge
Geneve' filter. The RG filter is a modified broad Gunn R filter, with an
effective wavelength of 660nm.
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Global notes:
Note (G1): The goodness of fit of the image, χ^2/Ndof, is used to rescale
the formal uncertainties by a factor of (χ^2/Ndof )1/2.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 08-Nov-2019