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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 abort [-d] Aborts an ongoing exposure. DET
alfosc dark [-d] [-t] [-f] [-n]<tt> Makes a dark exposure of <tt> seconds. If <tt> is set to zero a BIAS exposure is made. If the exposure time is larger then 60 seconds, automatic remnant removal is done before the exposure starts. If the option [-f] (fast mode) is used, the prompt will be returned when the exposure time is over and before the readout begins. If the option [-n] is used, there will be no automatic remnant removal. DET
alfosc dither [-e] [-t] [-nowakeup] <pattern> <offset_size> <tt> Takes single exposures with exposure time <tt> at each pointing of the dither pattern <pattern> with offset <nn> arcseconds between each exposure. DET
alfosc easyflat [-f] [-silent] [<N>] Makes <N> automated imaging skyflats. If <N> is not specified, one skyflat will be done. DET
alfosc expose [-d] [-t] [-f] [-n]<tt> Makes an exposure of <tt> seconds. Remnant removal is made before the exposure starts, if the exposure time is larger then 60 seconds. If the option [-n] is used, no remnant removal is done. If the option [-f] (fast mode) is used, the prompt will be returned when the exposure time is over and before the readout begins. If [-f] is used, make sure that "alfosc.wait-camera-state idle"-command is given before any "alfosc_camera_commands". If the exposure time is larger than 300 seconds, the time left until the rotator reaches its limit will be checked. If there is not time enough to complete the exposure, an error will be generated and the exposure will not start. DET
alfosc mdark [-t] [-n] [-f]<tt> <nn> Makes <nn> dark exposures of <tt> seconds. If the [-t] flag is used, a simulated exposure is made. If the exposure time is larger then 60 seconds, automatic remnant removal is done before the exposure starts. If the option [-f] (fast mode) is used, the prompt will be returned when the exposure time is over and before the readout begins. If the option [-n] is used, there will be no automatic remnant removal. DET
alfosc mexpose [-t] [-n] [-f]<tt> <nn> [<imtype>] Makes <nn> exposures of <tt> seconds. Remnant removal is made before the exposure starts, if the exposure time is larger then 60 seconds. If the option [-n] is used, no remnant removal is done. If the option [-f] (fast mode) is used, the prompt will be returned when the exposure time is over and before the readout begins. If [-f] is used, make sure that "alfosc.wait-camera-state idle"-command is given before any "alfosc_camera_commands". If the exposure time is larger than 300 seconds, the time left until the rotator reaches its limit will be checked. If there is not time enough to complete the exposure, an error will be generated and the exposure will not start. DET
alfosc readout [-d] Closes the shutter and readout the ccd. The exposure must first be put in the background. Does not work correctly when using a window in Y direction. DET
alfosc readspeed [-d] <readout_speed> Sets the CCD readout speed to <readout_speed> kpix/second. Valid values for <readout_speed> are 100, 200, 400 or 800. DET
alfosc remove_remnants Remove remnants from the CCD DET
alfosc resetxy [-d] Resets the ccd binning to 1, the X and Y size to maximum and the X and Y beginning to 1. DET
alfosc xbeg [-d] <nn> Sets the X beginning to <nn>. DET
alfosc xbin [-d] <n> Sets the binning factor in the X direction to <n>. DET
alfosc xsize [-d] <nn> Sets the X size to <nn>. DET
alfosc ybeg [-d] <nn> Sets the Y beginning to <nn>. DET
alfosc ybin [-d] <nn> Sets the binning factor in the Y direction to <n>. DET
alfosc ysize [-d] <nn> Sets the Y size to <nn>. DET

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