J/ApJ/798/95 HE1104-1805 BVRIJ light curves (Blackburne+, 2015)
The structure of HE 1104-1805 from infrared to X-ray.
Blackburne J.A., Kochanek C.S., Chen B., Dai X., Chartas G.
<Astrophys. J., 798, 95 (2015)>
=2015ApJ...798...95B 2015ApJ...798...95B
ADC_Keywords: Photometry, UBVRI ; Photometry, infrared ; QSOs ;
Gravitational lensing
Keywords: accretion, accretion disks; gravitational lensing: micro;
quasars: individual: HE 1104-1805
Abstract:
The gravitationally lensed quasar HE 1104-1805 has been observed at a
variety of wavelengths ranging from the mid-infrared to X-ray for
nearly 20yr. We combine flux ratios from the literature, including
recent Chandra data, with new observations from the SMARTS telescope
and Hubble Space Telescope, and use them to investigate the spatial
structure of the central regions using a Bayesian Monte Carlo analysis
of the microlensing variability. The wide wavelength coverage allows
us to constrain not only the accretion disk half-light radius r1/2,
but the power-law slope ξ of the size-wavelength relation
r1/2∝λξ. With a logarithmic prior on the source
size, the (observed-frame) R-band half-light radius log (r1/2/cm) is
16.0-0.4+0.3, and the slope ξ is 1.0-0.56+0.30. We put
upper limits on the source size in soft (0.4-1.2 keV) and hard
(1.2-8keV) X-ray bands, finding 95% upper limits on log (r1/2/cm) of
15.33 in both bands. A linear prior yields somewhat larger sizes,
particularly in the X-ray bands. For comparison, the gravitational
radius, using a black hole mass estimated using the Hβ line, is
log(rg/cm)=13.94. We find that the accretion disk is probably close
to face-on, with cos(i)=1.0 being four times more likely than
cos(i)=0.5. We also find probability distributions for the mean mass
of the stars in the foreground lensing galaxy, the direction of the
transverse peculiar velocity of the lens, and the position angle of
the projected accretion disk's major axis (if not face-on).
Description:
We combine data from the literature with new photometry from the Small
and Moderate Aperture Research Telescope System (SMARTS) and HST to
create a lightcurve spanning about 19yr and from the near-IR to X-rays
in wavelength.
We use data from eight seasons of monitoring by the ANDICAM camera on
the SMARTS telescope, primarily in the R and J bands, with some data
in B, V, and I. The seasons were typically eight or nine months in
length. The first three seasons of the R and J light curves are
reported by Poindexter et al. (2007, J/ApJ/660/146), but for
convenience we report them in their entirety, together with the B, V,
I, and J data, in Table 1.
We have observed HE 1104 in the F275W filter (rest-frame 0.083um)
using the UVIS channel of the Wide Field Camera 3 on board HST at 10
epochs roughly evenly spaced between 2009 December 4 and 2011 November
11.
Objects:
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RA (ICRS) DE Designation(s)
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11 06 33.39 -18 21 23.8 HE 1104-1805 = QSO B1104-181
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 463 SMARTS light curves
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See also:
J/MNRAS/435/3376 : LFIR for 247 extragalactic systems (Heywood+, 2013)
J/ApJ/756/52 : R-band light curve of QSO J0158-4325 images (Morgan+, 2012)
J/ApJ/755/31 : Compilation of 122 strong gravitational lenses (Cao+, 2012)
J/ApJ/740/L34 : Chandra monitoring of QSO J2240+0321 (Chen+, 2011)
J/ApJ/660/146 : HE 1104-1805 differential light curves (Poindexter+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Heliocentric Julian Date of the observation
13- 17 F5.2 mag A [-1.5/0.2] The A image magnitude in Filt (1)
19- 22 F4.2 mag e_A [0.01/0.03] Uncertainty in A
24- 28 F5.2 mag B [-0.4/1.8] The B image magnitude in Filt (1)
30- 33 F4.2 mag e_B [0.01/0.06] Uncertainty in B
35 A1 --- Filt Filter used in the observation (B,V,R,I or J)
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Note (1): Relative to an arbitrary standard.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-May-2015