
%0 Journal Article
%A Agol, Eric 
%A Wyithe, Stuart 
%A Jones, Barbara 
%A Fluke, Chris 
%T Mid-Infrared Imaging of the Einstein Cross QSO
%J Publications of the Astronomical Society of Australia
%D 2001/09/28
%V 18
%N 2
%P 166-168
%K quasars: individual (Q2237+0305)&#8212;gravitational lensing&#8212;radiation mechanisms: general &#8212; infrared: general
%R https://doi.org/10.1071/AS01015
%U https://www.publish.csiro.au/paper/AS01015 
%X Received 2001 January 21, accepted 2001 March 7 Observations of the Einstein Cross QSO reveal that the mid-infrared region is unaffected by microlensing. Thus, the infrared emission region must be extended on a scale &#62;1017 cm, ruling out synchrotron models, but consistent with dust emission models. Other constraints rule out starburst models. The flux ratios greatly constrain the lens model. 
