This file lists the shifts (in original WF and PC pixels) between different dither positions, as measured by cross-correlation. The numbers listed are the shifts required to bring each frame into alignment with the d6 position. Shifts for F300W and F450W Chip 1 Position Xshift Yshift 6 0. 0. 1 29.189 15.461 2 20.648 -19.786 3 13.726 11.685 4 6.880 -24.709 5 3.607 25.698 7 -10.846 -14.657 8 -17.538 19.356 9 -22.756 -10.025 Chip 2 Position Xshift Yshift 6 0 0 1 7.194 -13.289 2 -8.965 -9.528 3 5.403 -6.231 4 -11.275 -3.250 5 11.771 -1.543 7 -6.750 4.901 8 8.782 8.103 9 -4.681 10.369 Chip 3 Position Xshift Yshift 6 0 0 1 -13.327 -7.122 2 -9.479 9.017 3 -6.260 -5.369 4 -3.189 11.292 5 -1.607 -11.762 7 4.937 6.724 8 8.056 -8.826 9 10.394 4.625 Chip 4 Position Xshift Yshift 6 0 0 1 -6.994 13.395 2 9.107 9.392 3 -5.308 6.311 4 11.322 3.081 5 -11.747 1.720 7 6.676 -5.001 8 -8.902 -7.971 9 4.525 -10.438 Shifts for F606W Chip 1 Position Xshift Yshift 6 0 0 1 29.283 15.446 2 20.576 -19.705 3 13.552 11.890 4 6.916 -24.862 5 3.657 25.713 7 -10.846 -14.657 8 -17.379 19.144 9 -22.742 -10.171 Chip 2 Position Xshift Yshift 6 0 0 1 7.187 -13.332 2 -8.929 -9.494 3 5.495 -6.150 4 -11.345 -3.267 5 11.778 -1.566 7 -6.750 4.901 8 8.686 8.030 9 -4.748 10.362 Chip 3 Position Xshift Yshift 6 0 0 1 -13.371 -7.115 2 -9.446 8.980 3 -6.180 -5.462 4 -3.206 11.362 5 -1.630 -11.769 7 4.937 6.724 8 7.983 -8.729 9 10.387 4.691 Chip 4 Position Xshift Yshift 6 0 0 1 -6.987 13.438 2 9.071 9.359 3 -5.402 6.232 4 11.393 3.096 5 -11.753 1.743 7 6.676 -5.001 8 -8.805 -7.898 9 4.591 -10.432 Shifts for F814W Chip 1 Position Xshift Yshift 6 0 0 1 29.231 15.1620 2 20.955 -19.757 3 14.045 11.422 4 7.231 -24.666 5 3.890 25.297 8 -17.028 19.056 9 -22.283 -10.071 Chip 2 Position Xshift Yshift 6 0 0 1 7.058 -13.309 2 -8.951 -9.668 3 5.284 -6.378 4 -11.254 -3.410 5 11.589 -1.674 8 8.647 7.869 9 -4.699 10.152 Chip 3 Position Xshift Yshift 6 0 0 1 -13.347 -6.986 2 -9.620 9.003 3 -6.406 -5.249 4 -3.349 11.272 5 -1.737 -11.579 8 7.822 -8.689 9 10.177 4.644 Chip 4 Position Xshift Yshift 6 0 0 1 -6.857 13.414 2 9.095 9.533 3 -5.187 6.456 4 11.304 3.241 5 -11.562 1.848 8 -8.764 -7.738 9 4.547 -10.221