Left panel: nuclear region of 3C 187 as imaged by Chandra-ACIS detector in the 0.3 − 7 keV band, smoothed with a Gaussian kernel with a 1 × 1 pixel () σ. The white diamond indicates the optical identification by Hes et al. (1995), and the green cross indicates the radio core position by Neff et al. (1995). The white line represents the 1 mJy beam⁻¹ contour of the VLA 4.87 GHz observation presented by Bogers et al. (1994). The white X indicates the position of the centroid evaluated in the region represented with the green dashed line. Right panel: same as the left panel after the registration of the X-ray image to match the centroid position with radio core position.