
TY  - JOUR
A1  - Yonehara, Atsunori 
T1  - Source Size Measurement from Observed Quasar Microlensing
JF  - Publications of the Astronomical Society of Australia
JO  - Publ. Astron. Soc.  Aust.
Y1  - 2001
VL  - 18
IS  - 2
SP  - 211
EP  - 214
KW  - accretion, accretion disks &#8212; galaxies: active &#8212; gravitational lensing &#8212; quasars: individual (Q2237+0305)
UR  - https://doi.org/10.1071/AS01014 
N2  - Received 2001 January 21, accepted 2001 May 5 Recently, the OGLE team have reported a clear quasar microlensing signal in Q2237+0305. I have analyzed the microlens event of &#8216;image C&#8217; by using their finely and densely sampled light curves. From light curve fitting, I unambiguously set the source size of &le;0.98 Einstein-Ring radius as a conservative limit. This limit corresponds to 2000 AU, if I adopt Mlens ~ 0.1M obtained by a recent statistical study of the mean mass of the lens object. This gives clear evidence for the existence of an accretion disk in the central region of the quasar. 
ER  -

