Name
ab -- acquire spectra in an AB sequence
Purpose
Acquire one or more sequences of two spectra in which the
images are offset to either side of the starting point
Usage
ab [size [repeats]]
Arguments
size = dither size to each side of starting location
[arcsec; default=1.0 arcsec]
repeats = number of times to repeat AB pattern [default=1]
Output
Transcript written to stdout
Side effects
Marks base before starting exposure sequence
Exit values
0 = normal completion
1 = wrong number of arguments
Example
1) Acquire a single AB sequence with 1.0-arcsec nods
ab
1) Acquire five AB sequences with 1.5-arcsec nods
ab 1.5 5
See Also
The shell script ab
DEIMOS script index
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Last modified: Tue Feb 25 22:25:44 2014
