Image Details
Caption: Fig. 8.
Left: Stacked 3.6 μm IRAC image of all 22 radio sources for which there is no infrared counterpart. Right: Stacked 3.6 μm IRAC image of the eight brightest radio sources for which there is no infrared counterpart. In both cases, the position of the radio source is at the center.
© 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A.