Notes. Measured position for IRC+10216 (epoch 2006.16) and the adopted positions for the calibrator sources are given in columns two and three in J2000 coordinates. Calibrator positions are taken from the VLBI Global Solution 2008b Astro Catalogue available on the NASA Goddard Spaceflight Center Geodetic VLBI group’s website; see also Petrov et al. (2008). Numbers in parentheses give the error in the last quoted digit(s). For the complex-gain calibrators J0943+170 and J0954+177, column four lists their angular separations from IRC+10216. The separation between these two calibrators is . Column six lists the measured flux densities based on the assumed value for 3C 286. We estimate the flux density scale is accurate to  ± 5%.