OPTGAM -- optimises systemic velocity of system.
After you have iterated close to the final image you can use optgam to
find the best gamma velocity by chi**2 minimisation in 1D. The revised
value is stored in the image which is otherwise unchanged. You should
re-iterate the image and in general a couple of times round the cycle
are needed.
Parameters:
IMAGE -- Input image file to load and which will contain the
modified systemic velocity.
DATA -- Data file containing data and errors used to generate IMAGE
STEP -- Initial step size to take (km/s)
DELTA -- Accuracy wanted in final answer (km/s)
This command belongs to the class: extra