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ALFOSC Sequencer Command Documentation

Go to the SEQUENCER Reference Manual Main Page.

Instrument : ALFOSC
Observing Mode: ANY IMA SPEC POL
Command Type: ANY DATA DET DISP INST TEL
Usage: BASIC GENERAL STAFF
Description: SHORT LONG

SystemCommandArgumentsDescriptionType
alfosc acquisition [-c] [-q] [-nofo] <slit> <tt> Script for ALFOSC-spectroscopy target acquisition for slit <slit> using exposure time <tt>. If optional flag -c is used, a check image of the star on the slit is made. If optional flag -q is used, the user is queried for another iteration. The -nofo flag should be used if no automatic focus-offset should be set. TEL
alfosc focus [-e] [-n <N>] [-nodefault] [-t <nn>] [-a <mode>] Focuses the telescope. [-n <N>] makes <N> loops. [-t <nn>] sets exposure time to <nn> . [-nodefault] starts from current focus. [-a <mode>] acquisition using <mode>. TEL
alfosc focus-offset [-e] [-d <nn>] Applies focus offset for optical elements in the light beam. If no offset is known a value of 0 will be assumed. Use [-d] flag to defocus the telescope with <nn> units. TEL
alfosc slitoff [slit=<nn> | xref=<x> yref=<y>] Calculates the telescope offset needed for slit number <nn>, or for a slit with position (<x>, <y>). TEL
alfosc teloffset <n> <m> Offsets an object on the CCD <n> arcseconds in X direction, <m> arcseconds in Y direction. TEL

In scripts, the syntax alfosc.<command> should be used.
If a part of a command is written in <angle brackets>, this is an argument that should be replaced with a value.
If a part of a command is written in [square brackets], this is an optional argument or flag.
When available, the optional flag -d will write extended debugging information to the log.
When available, the optional flag -e will show the script on standard output instead of executing the commands.
When available, the optional flag -t will only make a simulated exposure. Useful for testing scripts.

Type definitions:
DATA: All commands related to handling/modifying data (editing fits-headers, post-processing etc.).
DET: Commands related to operations with the detector.
DISP: Commands related to displaying images on the instrument computer.
INST: Commands related to operations with the instrument.
TEL: Commands related to operations with the telescope.

Back to top Last modified: November 23 2011