Fig. 3a-y1 :   Target Acquisition and Guiding: centering the IFU
... and performing a telescope slew to the computed offset position. In this example, the central star of the Ring Nebula M57 was selected as the target to be centered on the IFU. Note that the guide star window is automatically shifted on the CCD by exactly the same offset as the telescope is shifted on the sky (white square) ... (STEP 2)

Last update September 10, 2004  by  M. Roth