|U.S. Naval Observatory||Astrometry Department|
# Telescope Observation Date Image Scale d KPNO 0.9m April 94 0.68 "/pixel e KPNO 0.9m Oct. 94 0.68 f CTIO 0.9m Dec. 94 0.40 g CTIO 0.9m Feb. 95 0.40 h KPNO 0.9m June 95 0.68 i CTIO 0.9m Sept. 95 0.40 j CTIO 4.0m Oct.,Nov. 95 0.43 k KPNO 0.9m Jan. 96 0.68 l CTIO 0.9m July 96 0.40 m CTIO 0.9m July 97 0.40All images are 199 by 199 pixels in size with North up and East to the left. Note the different scale for each telescope. The radio source object is in the center at x=y=100. WARNING: there are some empty fields. In such a case the x=y=100 position points to empty background and no optical counterpart is visible within the limiting magnitude. For more details see the related paper: Zacharias et al., "Accurate optical positions of extragalactic radio reference frame sources", AJ 118, Nov 1999. When using the finding charts provided here, please cite that reference.