ALFOSC GAIN and RON test instructions
Could be done during the day time.
Taking images
- Get beta light source from carousel, don't drop!
- Put beta light into FASU B, position 6, align with marks on slot edge
- Put FASU control to local, open shutter
- Disconnect the dewar pressure sensors (this reduces the RON)
- Close FASU covers or turn off all lights from dome and close the door
- Update the ALFOSC filter wheel setup definition file to include "Beta
Light" using the
GUI editor.
For unforeseen cases, it is possible to manually edit the setup file
(~alfosc/src/uif/setup/fasub.def). Please take great care to adhere to the
format instructions
when you are using a text editor.
- ALFOSC UIF: press "read setup" button
None Sequencer
- ALFOSC UIF: FASU B wheel "Beta Light", all other wheels "OPEN"
- start ALFOSC BIAS if not running, filename should be the normal name for
current day in order to save images to CD
- ALFOSC BIAS: run betafull
- sequence takes 3 darks (not saved), 2 15 second flats (saved), 3 darks
(not saved) and 2 darks (saved), runtime 70 s
- this is done four times, for amp B hi, amp B lo, amp A lo and amp A hi each
Sequencer
- Start the ALFOSC software in
sequencer mode .
- run betafull.seq. This, as well as making the exposures, first positions
all the wheels correctly.
Take out beta light from FASU B and put back to carousel
edit fasub.def to remove "Beta Light"
ALFOSC UIF: press "read setup" button
Analysing images
- log into cassandra as guest
- cd /data/alfosc, and locate test files
- run script by typing /var/qc-user/bin/alfosc_analyse <first-image-name>.fits, do this also for fifth, ninth and thirteenth image.
- Don't worry if you typed it wrong, IDL program will ask for the file if it does not exist.
- If you gave the wrong filename, you can kill the process with ctrl-c.
- click on fancy IDL splash screen to continue
- if you did not specify file when calling the script, you are prompted for FIRST test file, select and press OK
- since there are gazillion images in directory /data, it may take quite long before selection window appears
- to narrow down number of files, type day prefix into "filter" box
- check here for nice pictures
How analysing scripts work
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