Pan-STARRS images of 3C 187 in the g (upper left panel), r (upper central panel), i (upper right panel), z (lower left panel), and y (lower right panel) filter with the VLA L-band contours superimposed in cyan and in green the GMRT 150 MHz contours. The red circles indicate the cluster member candidates selected in at least one color, while the green circles indicate the field sources not selected as cluster member candidates in any color. The magenta circle indicates the counterpart to 3C 187 core, and the white diamond indicates the location of the optical identification by Hes et al. (1995) for the 3C 187 nucleus. White crosses represent X-ray point sources detected in the 0.3 − 7 keV Chandra image. The xs indicate the sources for which optical spectra were obtained with Victor Blanco Telescope. In particular, the green xs indicates sources with stellar spectra and the red x indicates the source with a galactic spectrum with redshift 0.4662 (see Fig. 13).