European Southern Observatory New Technology Telescope

General :
Observations :
Operations :

Red Filter Offset

To measure a Red Filter Offset  :

• Install pinhole in the STAP  wheel.
• Update EMMI configuration
• Call  file  OBD/emmi/setup/RedFilterOffset.obd from BOB
• unfold obd in BOB
• if the filter which you want to measure is not in the list

either edit the file RedFilterOffset.obd to include it
or send a mail to staff in charge.
• skip out (click right button) filters which are not present

in the red filter wheel or that you do not want to measure.
Every template measures also the focus wedge misalignment
for its current filter.
The last template call measures thru focus without
filter: it should never be skipped.
• Start template
• Stand by until the end of first filter measurement because

MIDAS/PCO may ask you to click subimages
taking care that each is really grapped by the
center/gauss window.
For the following filters, the sequence is automatic.
• Terminate clicking twice the middle button
• Check /vltdata/SPC/RILDST04.SPC for consistency

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