| System | Command | Arguments | Description | Type |
|---|
| alfosc |
abort |
[-d] |
Aborts an ongoing exposure (see also expose). |
DET |
| alfosc |
allopen |
[-e] |
Will move all ALFOSC/FASU optical wheels to the OPEN position. Only wheels that according to the ALFOSC status are not already OPEN will be commanded to move. FASU wheels will always be commanded to move. |
INST |
| alfosc |
autoshow_off |
[-d] |
Turns off the automatic image display while reading out. If DS9 is running it will be terminated. |
DISP |
| alfosc |
autoshow_on |
[-d] |
Turns on the automatic image display while reading out. If no DS9 is running one will automatically be started. |
DISP |
| alfosc |
calibexp |
[-e] [-f] [-n <nn>] [-o <ObjName>] [-lmi] <lampID> <tt> |
Script for making a calibration spectrum with ALFOSC. Possible arguments are:
- -e echo mode: do not execute commands, only echo them
- -f fast mode:
script will return during the readout of the last exposure
- -n <Nexp> optional number of exposures (default=1)
- -o <ObjectName> optional ObjectName
- -lmi if set the mirror will stay in the beam at exit
- <lampID> with <lampID>=He/Ne/HeNe/ThAr/Halogen
- <exptime> exposure time
Sets the ALFOSC calibration items (mirror & lamps) up for a calibration spectrum, takes the calibration image(s) of which the last one in the background, switches off lamps, and per default takes calibration mirror out at exit. Switches autosave_on, and leaves it on. Moves FAPOL out if necesary. Sets header IMTYPE to FLAT/WAVE . If an <ObjectName> is given (double quoted if containing spaces), then the string will be added to the already present lamp specifier in the OBJECT FITS keyword. If CNTR-C is pressed the ongoing exposure will be aborted, and the calibration mirror will be moved out of the beam. NOTE: the last exposure will be taken in the background, so that instrument setup can be done during readout.
Usage example:
alfosc.calibexp -n 2 Halogen 15 Makes 2 halogen flatfield images with individual exposure time of 15s. |
DET |
| alfosc |
carriage |
[-d] [pos] [ready] [action] |
Moves FAPOL carriage in or out with the [action] keyword. [action] can be 'in', 'IN', 'out' or 'OUT'. [pos] returns '1' if the carriage is in the lightpath, '0' if it is out. [ready] returns '0' if the element is moving, '1' if it is ready. |
INST |
| alfosc |
cirpolexpose |
[-e] <Nang> <ObjName> <tt> <Ncyc> [-nowindow] |
Sets up and executes a set of circular polarimetry imaging exposures with <Nang> angles, exposure time <tt> and <Ncyc> cycles. If optional argument -nowindow is used, no windowing is applied. Available number of angles: 1 (0°), 2 (0°, 90°) and 4 (0°, 90°, 180°, 270°). |
DET |
| alfosc |
cirpolspec |
[-e] <Nang> <ObjName> <tt> <Ncyc> |
Sets up and executes a set of circular polarimetry spectroscopy exposures with <Nang> angles, exposure time <tt> and <Ncyc> cycles. Available number of angles: 2 (0°, 90°) and 4 (0°, 90°, 180°, 270°). |
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 |
display |
[<file>] |
Loads an image into the ALFOSC DS9 display. If no <file> is specified, the last image obtained will be loaded. If no DS9 display exists, one will be started. |
DISP |
| alfosc |
dither |
[-e] [-t] [-nowakeup] <pattern> <offset_size> <tt> |
Takes single exposures at each pointing of a dither pattern. The pointings in a dither pattern are symmetrical around the initial pointing, except for the ABBA scripts, which starts with an exposure on initial pointing. It is possible to specify a negative offset size, in which case the offsets are performed in the opposite direction.
- [-e]: Echo script on stdout, do not execute
- [-t]: Simulate exposure only
- [-nowakeup]: no astrowakeup at the end of script
- <pattern> predefined dither pattern.
- <offset_size> telescope offset in arcsec between each exposure.
- <exptime> exposure time at each pointing.
The dither pattern can be one of the following listed below: - 2X : 2-point (X)
- 3X : 3-point (X)
- 5X : 5-point (X)
- 2Y : 2-point (Y)
- 3Y : 3-point (Y)
- 5Y : 5-point (Y)
- 5D : 5-point (dice 5)
- 4G : 2x2 grid
- 9G : 3x3 grid
- 16G : 4x4 grid
- ABBAX : A-B-B-A (X)
- ABBAY : A-B-B-A (Y)
Usage example:
alfosc.dither 3X 20 15 Makes a 3-point X dither pattern with a 15s exposure at each dither point and a 20" offset between each exposure. |
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.
To abort the exposure press "Control-C". This command checks if ALFOSC, FASU and FAPOL are ready before beginning the exposure. If 90 seconds occurs and it is not ready this command will time out.
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 |
focus |
[-e] [-n <N>] [-nodefault] [-t <nn>] [-a <mode>][-filter] |
Fully automated focus script for ALFOSC.
[-n <N>]: Number, <N>, of maximal loops, default is 3.
[-t <nn>] Expose <nn> seconds. Default is 10.
[-nodefault]: Start from actual focus rather than default focus.
[-filter]: Leave current filters in the beam
[-a <mode>]: Acquisition mode. <mode> can be:- noacq: Use current pointing for focusing.
- nearest: Use nearest focus field from current pointing.
- optimal: Use nearest focus field between 60-70 degrees altitude (default)
Focus is determined without any filter in the beam (except if the -filter flag is set). Filter and any other ALFOSC instrument & detector settings will be saved before running the focus script and restored at the end.
The 'focus' command is the recommended way of focusing the telescope. In case the command fails, for instance if too few stars are detected in the image, the focus can be determined in a more interactive mode by using the commands focuspyr-setup, expose, focuspyr, focus-position (see documentation on these commands for further information).
Usage example:
alfosc.focus -n 4 -t 15 -a nearest Focuses the telescope using the nearest focusfield, doing 4 loops with individual exposures of 15s. |
TEL |
| alfosc |
focus-offset |
[-e] [-d <nn>] |
Optics in the beam introduces a telescope focus offset (see table). The 'focus-offset' command checks what is currently in the FASU and ALFOSC filter wheels and applies the corresponding focus offset (using foc-del) when possible. The focus offset introduced by a retarder plate in polarimetry mode is also accounted for. Be very careful when using this command. Focus offset for many optical elements are not known and as a consequence the telescope may in fact not be in focus even after using this command. If the focus offset is not known, 0 will be assumed. If this occurs, a warning message will appear both in the talker window and in the sequencer window. Several warning messages may appear if several optical elements in the beam have unknown focus offsets. The final telescope focus offset applied is the sum of the offsets for the element in each wheel, and may therefore be wrong if any offset is unknown. Do not use this command in scripts unless you are absolutely sure that the focus offset are known for all optical elements to be used.
If you intentionally wish to defocus the telescope (for instance when observing very bright targets), call the script with the [-d] flag, specifying the number of focus units to defocus the telescope with, for instance
focus-offset -d 200
will defocus the telescope with 200 units with respect to optimal focus. Reasonable defocus values ranges from 50-2000 units. |
TEL |
| alfosc |
imexam |
|
Initiates an IRAF imexam session on the image currently loaded into the ALFOSC DS9. While active in the imexam session, no further commands can be issued from the sequencer window. To kill the imexam session type q on the image in the postprocessing display.
CURSOR KEY COMMANDS:
? Print help
a Aperture radial photometry measurement (see above for output)
c Column plot
e Contour plot
f Redraw the last graph
j Fit 1D gaussian to image lines
k Fit 1D gaussian to image columns
l Line plot
m Statistics
image[section] npixels mean median stddev min max
q Quit
r Radial profile plot (see above for output)
s Surface plot
x Print coordinates
col line pixval [xorign yorigin dx dy r theta]
|
DATA |
| alfosc |
lamp |
[-d] [position] <n> <m> |
Turn on/off lamp no. <n>, where <n> is [1-4] and <m>='1' to turn on and <m>='0' to turn off. Current (29/10-2007) lamp setup: Lamp 1 is "He" Lamp 2 is "Ne" Lamp 3 is "Halogen" Lamp 4 is "ThAr Hollow Cathode". A timer will turn off any lamp after 1200 sec. Subsequent commands to turn on a lamp will result in the timer being reset to 1200 seconds. [position] returns a 4 bit pattern corresponding to the state of the 4 lamps: If bit no. 1 is set, lamp no. 1 is on, else off If bit no. 2 is set, lamp no. 2 is on, else off If bit no. 3 is set, lamp no. 3 is on, else off If bit no. 4 is set, lamp no. 4 is on, else off |
INST |
| alfosc |
linpolexpose |
[-e] [-nowakeup] [-std] <Nang> <ObjName> <tt> <Ncyc> [-nowindow] |
Checks if polarizer and Calcite are in and moves them in if necessary and does cycles of exposures. The object name is set to <ObjName> and the current polarizer angle is added (e.g. "<ObjName> 0deg"), object name is cleared when script ends. By default, the script windows the read-out using alfosc.polwin, with option -nowindow, no windowing is applied! Available number of angles: 4 (0°, 22.5°, 45°, and 67.5°) 8 (0° to 157.5° in steps of 22.5°) 16 (0° to 337.5° in steps of 22.5°). If the optional argument -std is used, the IMAGECAT keyword is set to CALIB and the data is made public immediately. |
DET |
| alfosc |
linpolspec |
[-e] [-nowakeup] [-std] <Nang> <ObjName> <tt> <Ncyc> |
Checks if polarizer and polarimetry slitlet are in and moves them in if necessary and does cycles of exposures. The object name is set to <myobject> and the current polarizer angle is added (e.g. "<myobject> 0deg"), object name is cleared when script ends. Does NOT window the read-out! Available number of angles: 4 (0°, 22.5°, 45°, and 67.5°) 8 (0° to 157.5° in steps of 22.5°) 16 (0° to 337.5° in steps of 22.5°) |
DET |
| alfosc |
log-comment |
"Comment in quotes" [file1 file2 ...] |
When invoked with just the comment, it will be applied to the latest available image with a prefix for the current night (which starts at noon) and the sequencer's instrument.
If image names are provided, the program will test the existence of ALL them before applying the change.
Eg.
$ alfosc.log-comment "This is a comment"
$ alfosc.log-comment "Comment for two" ALug170154 ALug170155
Notice that there's no need to add the ".fits" after each image's name
If no arguments are provided, a usage message is displayed |
DATA |
| alfosc |
mdark |
[-t] [-n] [-f]<tt> <nn> |
Makes <nn> dark exposure of <tt> seconds. To abort the exposures press "Control-C". The image type (IMTYPE keyword) will be set to "DARK" if the exposure time is non-zero and "BIAS" if it is zero. 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. To abort the exposures press "Control-C". The <imtype> option (IMTYPE keyword) is optional and must be a text string without spaces. There are reported problems with this command that have not yet been solved. If you experience this, please use the alternative command single-mexpose.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 |
object |
[-d] <text> |
Sets the FITS keyword OBJECT to <text>. |
DATA |
| alfosc |
polarizer |
[-d] [pos] [ready] <n> |
Moves the polarizer to angle <n>, where <n> is any multiple of 22.5 between '0' and '337.5'. [pos] returns the current polarizer position. [ready] returns '0' if the element is moving, '1' if it is ready. |
INST |
| alfosc |
polwin |
|
Windows the readout, optimized for imaging polarimetry. |
DET |
| alfosc |
qicpol |
[<2ndfile>] |
Circular polarimetry quick-look tool (FAPOL+ calcite) which calculates the circular polarization from a set of two images (retarder plate positions 0 and 90.0 degrees). The flux of each image is measured with fixed aperture using iraf/apphot from raw images. See more detailed description of the script from here |
DATA |
| alfosc |
qilpol |
[<4thfile>] |
Linear polarimetry quick-look tool (FAPOL+ calcite) which calculates the linear polarization from a set of four images (retarder plate positions 0, 22.5 45 and 67.5 degrees). The flux of each image is measured with fixed aperture using iraf/apphot from raw images. See more detailed description of the script from here. |
DATA |
| alfosc |
readout |
[-d] |
Closes the shutter and reads out the ccd. You have to put the exposure in the background first. This is achieved by pressing Ctrl+Z in the sequencer where the expose command is running, followed by running the command bg. Note that this command does not work correctly when using a window in Y direction: data from a wrong window will be saved to file. |
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 when saturation has taken place. |
DET |
| alfosc |
rempath |
[-d] <nn> |
Sets the remote saving path to <nn>. |
DATA |
| alfosc |
remsave_off |
[-d] |
Turns off remote saving. |
DATA |
| alfosc |
remsave_on |
[-d] |
Turns on remote saving. |
DATA |
| alfosc |
reset-log |
|
The script will use infosys.kill to reset the monitoring system, then it will wait for a set number of seconds, and at last it will instruct the obslog to show the listing for alfosc, all the while informing the user about what is happening
If there's any error, the script will notify the user and suggest further actions. |
DATA |
| 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 |
simpolexpose |
[-e] [-nowakeup] [-std] <Nang> <ObjName> <tt> <Ncyc> [-nowindow] |
Checks if polarizer and Calcite are in and moves them in if necessary and does cycles of exposures. The object name is set to <ObjName> and the current polarizer angle is added (e.g. "<ObjName> 0deg"), object name is cleared when script ends. By default, the script windows the read-out using alfosc.polwin, with option -nowindow, no windowing is applied! Available number of angles: 4 (0°, 22.5°, 45°, and 67.5°) 8 (0° to 157.5° in steps of 22.5°) 16 (0° to 337.5° in steps of 22.5°). If the optional argument -std is used, the IMAGECAT keyword is set to CALIB and the data is made public immediately. |
DET |
| alfosc |
teloffset |
<n> <m> |
Offsets an object on the CCD <n> arcseconds in X direction, <m> arcseconds in Y direction. |
TEL |
| alfosc |
wheels |
[-e] [-s <slit>] [-g <grism>] [-c <crossdisp>] [-f <filterID>] [-d <diffuserID>][-nowait] [-forceFASU] |
Script to setup all 5 ALFOSC wheels, in quickest possible way. Possible arguments are: - -s <slit> aperture-wheel item string
- -g <grism> grism string
- -c <crossdisperser> crossdisp grism string
- -f <filterID> filter ID number
- -d <diffuserID> diffuser ID number
- -nowait exit while wheels are moving
- -forceFASU force the FASU wheels to move even when at required position
Each wheel defaults to the OPEN position, unless it needs to be put to a different position as requested through the command-line arguments. Consequently, without any arguments alfosc.wheels puts all wheels to open. The script uses alfosc.optics to check the feasibility of the requested setup. If feasible, the wheels will be moved to put the requested items in the beam. If wheels are already in the correct position they will not be exercised, except for the FASU wheels when flag -forceFASU is given. If a requested setup is not possible, an error will result, and no wheels will be moved. Note: grism/slit strings should be unique. A list of optical items can be found here. Note: filter ID numbers can be found here. Note: the Focus_Pyr is considered a grism!! Note: for spectroscopy the horizontal/vertical requirements for the optical elements are tested.
Usage examples: - alfosc.wheels -f 74 sets up for imaging with filter #74
- alfosc.wheels -g Focus_Pyr sets up for focusing without filters
- alfosc.wheels -s Slit_1.0 -g "#4" sets up for spectroscopy with slit 1.0" and Gr#4
- alfosc.wheels -s Slit_1.0 -g "#4" -f 93 sets up for spectroscopy with slit 1.0" and Gr#4 and blocking filter #93
- alfosc.wheels -s Ech_0.8 -g "#9" -c "#10" sets up for Echelle spectroscopy with slit 0.8" and Echelle Gr#9 and cross disperser Gr#10
|
INST |
| 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 |
