CFHT, Instruments, Imaging, AOB, Hot Spot

The CFHT Adaptive Optics Bonnette :
Hot Spot

What is the Hot Spot :
The Hot Spot is the location that is defined as the position of the star when the wavefront sensor is "on-axis". This has to coincide with the telescope pointing axis so that when a star is acquired, it will be aligned with the wavefront sensor. Usually the hot spot is defined to be a little bit off axis because the center of KIR has a row and a column that are less than perfect. Note that unless the observer requires it, this should only be done on the first night of an AOB run.

Procedure :
After the OA has set up on their meridian/equator star, have them go to a guide star:

Created 7 July 2000.
Page maintained by Olivier Lai.
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