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3. The Above-slit colour filter slide and it's contents (ASCF) Date: 10/2/1999 By: S.Smartt Last update: 20/04/2001 By: B. Garcia-Lorenzo There is an above slit colour filter slide which can be manually accessed through a door in the A&G box. The above-slit ND slide can also be accessed through this door. A number of screws need undoing to get at them. The colour filter slide is the lower one, and the ND slide is the upper one. The colour filters are mounted like this : -------------------------------------------------------- A&G Box | / / / / | BG38 | WG360 | RG630 | GG385 | GG495 | the clear Door |/ / / / | | | | | | position End |/ / / / |(5) |(4) |(3) | (2) |(1) | (0) -------------------------------------------------------- ------------------------> goes into A&G Box like this The numbers refer to the position of the filter on the slide as called by the ICS. You should make sure that these match up to what is read by the ICS (using the change_agb command). NOTE WELL: YOU SHOULD NEVER MOVE FILTERS BETWEEN POSITIONS ON THIS SLIDE UNLESS IT IS ABSOLUTELY NECESSARY. IF YOU DO THEN YOU SHOULD INFORM THE INSTRUMENT SPECIALIST (Begoña García-Lorenzo bgarcia@ing.iac.es) IMMEDIATELY SO THAT A TRACK CAN BE KEPT ON WHERE THE FILTERS ARE. YOU MUST ALSO CHANGE THEIR POSITIONS IN THE ICS SOFTWARE, SO THAT OBSERVERS KNOW WHAT COMES UP ON THE MIMIC IS REALLY WHAT IS IN THE BEAM. The Above-slit nuetral density filters go in like this -------------------------------------------------------- A&G Box | / / / / | highest| | | | lowest | the clear Door |/ / / / | | | | | | position End |/ / / / |(5) |(4) |(3) | (2) |(1) | (0) --------------------------------------------------------
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