The overlapping-galaxy pair AM1311-455 (also listed
under the coordinate designation in the ESO catalog but lacking
an NGC number), in a true-color composite
CCD image. The early-type ringed spiral is clearly in the
foreground, with the blue-light extinction in the dusty
ring reaching 2 magnitudes. It is particularly noteworthy that
the background galaxy can be seen with little dimming inside this ring
structure, which may have swept the diffuse interstellar material
away from the region just inside the ring.
The data were taken with the 1.5-meter telescope at Cerro Tololo
Inter-American Observatory by W. Keel, R. White, III, and C. Conselice.
The image was produced from B and I-band frames using a Tektronix
2048x2048 CCD (of which this image is one quadrant), plus a synthetic
V image. Galaxy colors are close enough to a one-parameter family that
this technique gives a fairly accurate color depiction (and this is
what is done for most color HST imagery, as well).
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