Parsec-scale radio images of the blazar CTA 102 as observed with the VLBA on 2005-May-19. The interferometric beam is drawn at the bottom-right of each image; the linear scales are also shown. Contours are drawn on the false color image, the lowest one at 0.005 Jy/beam, and are spaced in factors of 2. At the redshift of z = 1.037 (luminosity distance of 6.9 Gpc) 1 mas corresponds to a distance of 8.11 pc and 8.4 × 104 gravitational radii for a black hole mass of 1010M⊙.
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