NED object is NGC 5490; Reference is 1982MNRAS.200..705J

   Figure 1. Brightness distributions of 15 nearby radio galaxies at 2.7GHz.
 For each source, details of the map are given. Maps at 5.0 GHz are from the
 5-km telescope and are of I - Q. The zero contour level is suppressed on the
 maps and negative contours are dashed. Unless otherwise noted, the contour
 interval is 3 mJy per beam area for 5-km maps. Details are given of any
 unusual map processing. A cross marks the position of the associated galaxy's
 nucleus, as given by Dressel & Condon (1976). The formal accuracy of these
 positions is +/- 4 arcsec. Map coordinates are for epoch 1950.0. The L-shape
 in the map corner gives the FWHM of the beam in right ascension and
 declination. The FWHM in right ascension of the beam is 2.0 arcsec at 5 GHz at
 full resolution, and is larger in declination by a factor cosec {delta}.