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   NED object is NGC 3430; Reference is  1997AJ....114...77N

   FIG. 3. NGC 3430 (a) Contours of constant H I flux overlaid on a greyscale
 of the Gunn r optical image of NGC 3424-30. NGC 3424 is to the southwest, NGC
 3430 is to the northeast. NGC 3430A is to the southeast. The H I data are
 naturally weighted yielding the synthesized beam shown in the lower right.
 Contour levels are logarithmic with levels at 0.05, 0.09, 0.16, 0.28, 0.50.
 0.88, 1.56, 2.77, 4.91, 8.71 Jy Bm^-1^ km s^-1^.

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