Bibcode
Fian, C.; Mediavilla, E.; Hanslmeier, A.; Oscoz, A.; Serra-Ricart, M.; Muñoz, J. A.; Jiménez-Vicente, J.
Bibliographical reference
The Astrophysical Journal, Volume 830, Issue 2, article id. 149, 6 pp. (2016).
Advertised on:
10
2016
Journal
Citations
25
Refereed citations
23
Description
We present eight monitoring seasons of the four brightest images of the
gravitational lens SDSS J1004+4112 observed between 2003 December and
2010 October. Using measured time delays for the images A, B, and C and
the model predicted time delay for image D we have removed the intrinsic
quasar variability, finding microlensing events of about 0.5 and 0.7 mag
of amplitude in the images C and D. From the statistics of microlensing
amplitudes in images A, C, and D, we have inferred the half-light radius
(at {λ }{rest}=2407 \mathringA ) for the accretion
disk using two different methods,
{R}1/2={8.7}-5.5+18.5\sqrt{M/0.3{M}ȯ
} (histogram product) and
{R}1/2={4.2}-2.2+3.2\sqrt{M/0.3{M}ȯ
} lt-days ({χ }2). The results are in agreement
within uncertainties with the size predicted from the black hole mass in
SDSS J1004+4112 using thin disk theory.