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Status of INGRID filters 
    (Nov-2002)  
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Filters recently received (not currently available for INGRID)
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* 2 filters from Barr (H, Ks: AO specified, spare set for INGRID)
  Notes: -Already paid (total price: 4810 pounds)
         -not measured at the IAC yet

* 1 filter from UCM (private NB filter)
  Notes: -tested at IAC by the UCM team
         -ready to be installed inside INGRID

* 1 filter from NDC IR Engin: H2v2-1 (free issue replacement)
  Notes: -Not measured at IAC yet
         -The H2v2-1 filter currently in use should be sent back 
          to NDC IR Engin next time we open.


Filters still to come
*********************

* 1 filter from Barr (J, AO specified)
  -Price: 2405 pounds
  -Expected arrival: ? 

* 2 filters from NDC IR Eng: HeI (1.083/0.016µm), Pa-gamma (1.094/0.016µm) 
  -Prices: HeI 1193 pounds
           Pa-gamma 1356 pounds
  -Expected arrival: Sept-Oct 2002

* 1 filter from NDC IR Eng: Pa-beta (free replacement of the Pa-beta filter 
                            currently in use)
  -Expected arrival: ?  

Cost of filters  
***************

filter   manuf.   price
---------------------------
J        Barr  2405 pounds
HeI      NDC   1193 pounds
Pa-gamma NDC   1356 pounds
Pa-beta  NDC   1193 pounds |
J-cont   NDC   1492 pounds | these should be paid as soon as we get the 
                             replacement for the Pa-beta filter