Changes
/* Acquiring a target */
== Acquiring a target ==
# Follow the facility [[Start-up recipe|start-up procedure in Section~\ref{sec-facstartup}]].# Check that the selected target is within the observing [[#Telescope pointing limits given in Section~\ref{sec-|observing limits}]].
'''On the TCS:'''
'''Back at the TCS:'''
# Set "Exp Time" to ~2-4s and "WINDOW" to "Full frame" to take images with the acquisition camera.
# Use the hand paddle for fine adjustment of the telescope to the target's coordinates while watching the image display for the target field to appear. Comparison with an $8 \times 8$~8x8 arcmin finderchart is most helpful.
# The position should be accurate if you have followed the [[Determining pointing offsets using a bright star|this procedure in Section~\ref{sec-brightstar}]], so check your zeropoints. If not, adjust "Exp Time" to search for patterns in fainter stars to compare with your finderchart. If this fails, then reduce the exposure time and scan the field by systematically adjusting RA & Dec.
# Once the target is identified, position it on the image display such that it falls on the centre of the science CCD.
* Using '''STE3/4''', video mode can be invoked by clicking "Snapshot", entering an integration time, selecting "Video" and clicking "Ready". It can be stopped by clicking "Snapshot" and "Stop". Video mode automatically prebins the CCD, so remember to change back to 1x1 afterwards, if appropriate.
* '''For a short run of short exposures''', you may set up a module (STE3/4 - see [https://www.saao.ac.za/wp-content/uploads/sites/5/SAAOCCDmanual.pdf "SAAO~CCD Camera Control Program , version 1.2", by J.W. Menzies]) and begin to observe
'''or'''
