The following routine is recommended to start the night.
If the DEIMOS dashboard's TV Guider button is red and says
TV Init, then these stages were not properly
intialized after being homed during the afternoon. To reset
these, click the Default DEIMOS
Configuration button on this panel to send all stages to
their nominal positions. Wait about 5 minutes for all stages to
finish moving and the button to return to its original
appearance before continuing.
Guider eavesdropping allows you to monitor the image from the
guide camera in real time. To start eavesdropping:
The “Facilities Summary” or FACSUM window is a real-time
display of the telescope status. To run FACSUM:
- Log into kealoha (five-headed display next to
hanauma) if you have not already done so.
- On the right-hand monitor, select the K2 Guider Eavesdropping > MAGIQ Menu >
Start ObserverUI option from the OpenWindows menu.
Xmet is a meteorological display showing current
summit temperature/dewpoint data. To run it:
- On the middle kealoha screen, select the K2 telescope status menu > FACSUM
option from the OpenWindows menu.
- Resize the window as desired.
In IRAF, turn off practice mode by issuing the command
- On the middle kealoha screen, select the K2 telescope status menu > XMET -
Weather option from the OpenWindows menu.
- Adjust the size of this window as desired.
xbox.practice = no
The telescope drive and control system must be given explicit
permission to run the instrument rotator. To do so:
Since DEIMOS lacks an atmospheric dispersion compensator,
observers are advised to select a guider filter which is well
matched to the central wavelength of observation in order to
ensure that the objects remain centered in the slits as the
airmass changes during observing. TV guider filter options
include broadband B, V, R, and
I, plus Clear and ND2 (2 mag
neutral density for bright sources); the default filter is
R. To change the filter:
- Click the Rotation button at
the right side of the Dashboard to launch the rotator panel.
- If the status of the rotator is not UNLOCKED,
then click on the UNLOCK button to
make it so.
- Click the Allow DCS Control
button at the lower left of the rotator panel, and release on
the yes option to enable DCS
- Ask the OA to perform a "Standby/Init" of the rotator.
- Verify that the mode switches to DCS.
Please note that the filter set is parfocal and hence no guider
refocusing is required when changing TV filters.
Command the hatch open from the Dashboard GUI to allow the guider to
see the sky.
In the starlist shown on MAGIQ, click the middle mouse button on
the target you wish to begin observing; this will highlight the
line in yellow on your MAGIQ GUI and also on the Observing
Assistant's MAGIQ GUI. Providing this information to the OA
before opening the dome may allow him or her to save time by
pre-positioning the telescope. If you have other needs (e.g.,
twilight flats), this is a good time to advise the OA.
The Observing Assistant (OA) is not permitted to open the dome
until after sunset. Please be patient while the shutter opens
and the OA checks the initial telescope pointing.
The DCS will not be able to locate targets until DEIMOS is
explicity sent to a rotator position. Ask the OA to send DEIMOS
to any position; for example, the position angle to be used for
your first target.
When ready to move the telescope, the OA will ask you for your
first target and load the coordinates from your starlist file. He or she will select a
bright star near your target and will attempt to acquire that in
the guider, then will double-check the accuracy of pointing by
acquiring one or two additional stars from the SAO or GSC
Ask the OA to focus the telescope using the appropriate method:
- Click the TV guider button on the DEIMOS dashboard GUI to get the TV Guider subpanel.
- Click the filter selector (grey droplist button),
select the filter of choice, and click the GO
button to change the filter.
Ensure that the DEIMOS position angle is set to the value you
wil be using for your target, and to focus in the vicinity of
- Autofoc on the guider if you will be using the longslit.
- Mira (replacement for MALIGN) if you will be doing
imaging or multislit work.