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== Acquiring a target with shocnwonder SHOCnWonder on the instrument selector ==
The instrument selector has replaced the old acquisition box, though the guide mirror remains. With shocnwonder SHOCnWonder mounted on the side of the instrument selector, the acquisition procedure is slightly different from when past imaging cameras were mounted on the bottom of the acquisition box. Whereas before, one would centre the guide mirror to allow the beam to pass through the central hole in the guide mirror to the camera, that hole is now covered by a fold mirror that directs the beam to shocnwonderSHOCnWonder, which is mounted at a 90 degree angle, effectively in the "initialise" position of the old acquisition & guiding camera. The new guide camera is mounted on linear stages that move in X and Y across the guide star finderchart field of view. With the wider field of view, '''target acquisition is done using SHOC, not the guide camera.''' If the guide camera is centred, it will obscure the SHOC beam, so it should always be positioned away from centre. The XY slide coordinates at the centre of the field are (7150, 82000).
The procedure for acquiring a target with shocnwonder SHOCnWonder on the 1.9m is as follows:
'''On the TCS (tcs74v4), slew to the target:'''