J/ApJ/806/258 Optical LCs of QSO J0924+0219 lensed quasar (MacLeod+, 2015)
A consistent picture emerges: a compact X-ray continuum emission region in the
gravitationally lensed quasar SDSS J0924+0219.
MacLeod C.L., Morgan C.W., Mosquera A., Kochanek C.S., Tewes M.,
Courbin F., Meylan G., Chen B., Dai X., Chartas G.
<Astrophys. J., 806, 258 (2015)>
=2015ApJ...806..258M 2015ApJ...806..258M (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing ; Photometry, RI ; QSOs
Keywords: accretion, accretion disks; gravitational lensing: micro;
quasars: general
Abstract:
We analyze the optical, UV, and X-ray microlensing variability of the
lensed quasar SDSS J0924+0219 using six epochs of Chandra data in two
energy bands (spanning 0.4-8.0keV, or 1-20keV in the quasar rest
frame), 10 epochs of F275W (rest-frame 1089Å) Hubble Space
Telescope data, and high-cadence R-band (rest-frame 2770Å)
monitoring spanning 11 years. Our joint analysis provides robust
constraints on the extent of the X-ray continuum emission region and
the projected area of the accretion disk. The best-fit half-light
radius of the soft X-ray continuum emission region is between 5x1013
and 1015cm, and we find an upper limit of 1015cm for the hard
X-rays. The best-fit soft-band size is about 13 times smaller than the
optical size, and roughly 7GMBH/C2 for a 2.8x108M☉ black
hole, similar to the results for other systems. We find that the UV
emitting region falls in between the optical and X-ray emitting
regions at 1014cm<r1/2.UV<3x1015cm. Finally, the optical size is
significantly larger, by 1.5σ, than the theoretical thin-disk
estimate based on the observed, magnification-corrected I-band flux,
suggesting a shallower temperature profile than expected for a
standard disk.
Description:
We monitored SDSS J0924+0219 for ten seasons (2003-2014) in the R band
using the SMARTS 1.3m telescope with the ANDICAM optical/infrared
camera, and for three seasons (2010-2013) using the 1.2m Euler Swiss
Telescope as a part of the COSMOGRAIL project.
SDSS J0924+0219 was observed at 10 epochs between 2009 August and 2011
August using the Wide Field Camera 3 (WFC3) on board the HST. We
monitored SDSS J0924+0219 in X-rays using the ACIS imaging
spectrometer on the Chandra X-Ray Observatory for six epochs between
2005 February 24 and 2010 October 5.
Objects:
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RA (ICRS) DE Designation(s)
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09 24 55.80 +02 19 24.8 QSO J0924+0219 = SDSS J092455.87+021924.9
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 251 SDSS J0924+0219 optical light curves
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See also:
J/A+A/568/A46 : High redshift cosmic web with QSO systems (Einasto+, 2014)
J/A+A/557/A44 : SDSS J1001+5027 doubly lensed quasar (Rathna Kumar+, 2013)
J/A+A/556/A22 : R-band light curves of RX J1131-1231 (Tewes+, 2013)
J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013)
J/AJ/143/119 : SDSS Quasar Lens Search. V. Final catalog (Inada+, 2012)
J/ApJ/756/52 : R-band light curve of QSO J0158-4325 images (Morgan+, 2012)
J/ApJ/740/L34 : Chandra monitoring of QSO J2240+0321 (Chen+, 2011)
J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)
J/MNRAS/382/412 : Catalog of SDSS-DR5/2MASS spectroscopic quasars (Ofek, 2007)
J/AJ/132/999 : SDSS quasar lens search (Oguri+, 2006)
http://www.cfa.harvard.edu/castles/ : CASTLES survey
http://cosmograil.epfl.ch/ : COSMOGRAIL home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 d HJD Heliocentric Julian Date; -2450000
10 A1 --- f_HJD [o] Flag on HJD (1)
12- 17 F6.3 mag A+Dmag [18.58/19.28] QSO A+D images R band magnitude
19- 23 F5.3 mag e_A+Dmag [0.003/0.06] Error in A+Dmag (2)
25- 30 F6.3 mag Bmag [20/20.6] QSO B image R band magnitude
32- 36 F5.3 mag e_Bmag [0.007/0.2] Error in Bmag (2)
38- 43 F6.3 mag Cmag [20.6/22.1] QSO C image R band magnitude
45- 49 F5.3 mag e_Cmag [0.01/0.7] Error in Cmag (2)
51- 56 A6 --- Tel Telescope identifier (3)
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Note (1):
o = Rejected as an outlier, see Section 3.2.1.
Note (2): We estimate the zero-point uncertainty to be 0.07mag. This
calibration uncertainty is not included in the errors bars.
Note (3): Telescope as follows:
Euler = The 1.2m Euler Swiss Telescope.
SMARTS = The SMARTS 1.3m telescope with the ANDICAM optical/infrared
camera.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Oct-2015