NASA/IPAC EXTRAGALACTIC DATABASE
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NED object is 3C 020; Reference is 1981MNRAS.195..261L
Figs 1-40 The contour interval for each source is indicated by the number
beside the letters 'CI'; this is the flux density in mJy of an unresolved
source which would produce a change of 1 contour. Except where noted in the
figure caption, contours are plotted at +- 1, +- 2,..., times the contour
interval; negative contours are shown dashed. For some sources, two or three
contour intervals have been used: for example, -'CIx,y' means that the contour
interval is x mJy up to the level y and y mJy thereafter.
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