The DEIMOS Slitmask Calibration Widget provides a simple means
to acquire calibration data (arcs and internal quartz flats)
for a series of slitmasks, allowing you to get dinner, sleep,
etc, while it carries out your calibrations.
Slitmask Calibration Tool
Follow these instructions to use it:
Launch the tool from the DEIMOS background menu by
selecting DEIMOS Utilities → Slitmask
Calibration Tool.
Configure the spectrograph for taking calibrations:
Close the hatch.
Extinguish lamps.
Set grating and central wavelength as desired.
Under SLIT WIDTH, select the typical width of
your slits in order to get the correct exposure time.
Under ARCS, set the number of
arc exposures to acquire, the exposure time, and the desired
lamps to use.
Under FLATS, set the number of
internal quartz flats to acquire and the desired exposure
time.
Under SLITMASKS, click on the
names of all masks to be calibrated with this configuration.
Under OPTIONS, select
Wait for FCS updates between exposures
to have the script pause in between each slitmask to allow FCS
to update 2 times and presumably recenter. If this is
selected,
FCSTRACK must be running or the script will fail.
Under OPTIONS, select
Do end-of-night shutdown when done to
have the script shutdown the instrument software after the
calibration exposures are completed. This allows you to go to
sleep at the end of the night while the script completes your
calibrations.
Click GO to start acquiring
data with the calib script.
Calibrating with Blue Lamps
When you acquire arcs with one of the “blue” arc lamps
(Cd, Zn, or Hg) enabled, the script will wait 3 minutes per
mask for the lamps to reach peak flux unless you disable the
Wait for FCS updates between exposures
option on the GUI. In this case, the arc lamps remain
“on” during the arc sequence and the script only waits
for the 3 min warmup on the first mask. Although it is a
minor hassle to have to run separate exposure sequences for arcs
and flats, doing so saves a lot of time.
Last modified: 03/07/2021 12:37 Send questions or comments to:DEIMOS Support