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GIRAFFE

2,267 bytes added, 21:35, 27 January 2015
/* Observing Recipe */
5) In the second pop-up window, select ''Local setup files'' → select ''giraffe.gir'' → ''Ready'' → ''Ok''
 
 
Each GIRAFFE run is assigned a '''run number''', that QUARTZ will now prompt you to enter. To determine your run number, look in the GIRAFFE log book located in the 1.9-m dome book rack and look for the last entry. Increase that run number by one. If you are a returning observer and wish to use the same directory, you will need to change your run number by deleting the file ''disk.file'' from your directory.
 
 
QUARTZ will now initialise the CCD controller and check the status of the GIRAFFE head. Do the following:
 
* Wait 2 minutes for it to finish initalising.
* Check that things are working, by reading out the CCD by selecting ''Read CCD'' from the ''CCD'' drop-down menu at the top right of the QUARTZ window. This will display information regarding the bias reading and the maximum CCD count.
4) Check and note down the prism position in the “Prism” status box at the bottom of the QUARTZ window.
5) Select “Filter” → “Init” at start of run & , and again before any every filter change 6) By taking an arc (follow steps 1-2 in Section 4.1), check the resulting orders are correct (see section on reductions software) and spectrograph focus is good (see Section 5).  '''3. Calibrations''' 3.1 Camera Flats Taking camera flats involves interacting with the components on the bench in the Coude room. '''Please be extremely careful not to touch anything except the flatfield screen and the lamp'''. At the start of the run, or after a software crash, obtain camera flats as follows: 1) On the bench in the Coudé room, slide the white screen in front of the camera. Switch on the small lamp from the shelf below and place it in front of the screen so as to illuminate it as uniformly as possible. 2) Select “ND Pos 1” and “Mir Pos 3” in the QUARTZ “Control” panel 3) In the bottom left window of the QUARTZ software, type *CAMERA 4) Click the “Expose” button in the “Control” panel on the right of the QUARTZ window and enter the exposure time. Counts should be as high as possible (<50000) without saturating. 5) After readout, check the information box on the bottom left – if saturated pixels are reported, reduce the exposure time. Flats with saturated pixels cannot be used. If satisfied, save to disk.  6) Check image is transferred to the thin client ''ltsp.suth:/data/74in/giraffe/data/image/yyyymmdd'', and check header info to ensure it is your file (not an old file with the same name). If data is not found on ltsp, check ''/data/image'' on the giraffe PC
67) By taking an arc (follow steps 1-2 in Section 4Expose and save 10 camera flats.1 8), check Remove the resulting orders are correct lamp and spectrograph focus is good (see Section 5)screen.
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