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WHT CCD Scales and Orientations

See the individual instrument pages for the most-recent information.

Camera             Field  "/pixel   For sky PA = 0        pixel pixels
                     "              N      E        Red   mic

ISIS red RED+       240   0.20      left            up    13.5  2k*4k
ISIS blue EEV12     240   0.20                      up    13.5  2k*4k

LIRIS imaging       256   0.25      up     left           18.5  1k*1k
LIRIS spectroscopy  256   0.25                            18.5  1k*1k

WYFFOS EEV mosaic                                   up          4k*4k

PF imager EEV mos. 1000   0.24      up     right          13.5  4k*4k

ACAM imaging        500   0.25      right  up             15    2k*4k
ACAM spectroscopy   500   0.25                            15    2k*4k

Aux-port TEK2       110   0.11      left   up             22.5  1k*1k
(decomm.)                           (at sky PA 45)
Aux-port 2 AG2      200   0.4       right?  up            13.5  1k*1k
(decomm.)                           (at sky PA 45)


AO system
---------

Acquisition AG3     200   0.407     left*  down*          13.5  1k*1k 

MIT3 imaging         38   0.02      up     right          15    2k*4k
MIT3 spec  8.5 mm     4             up**   right**        15    2k*4k
MIT3 spec 12.5 mm     6   0.0025    "      "              15    2k*4k
MIT3 spec 22 mm      10   0.005     "      "              15    2k*4k
MIT3 spec 33 mm      17             "      "              15    2k*4k

Simplex AG7          18   0.033     down   left***              560*536

INGRID                    0.04      up     right          18.5  1k*1k

NB with OSCA in the beam, the INGRID field is flipped up-down 
WFS foc plane       120   
WFS good-see lens         0.26                                  80*80
WFS poor-see lens         0.52                                  80*80
WFS doublet           5   0.06?                                 80*80
If sky PA is increased, the direction N on the detector will rotate away from the current direction E.

Notes:
* within 0.5 deg
** actually rotated 6 deg from this direction , so that E is 6 deg down from right, as conventionally viewed
*** on the iraf display. On the simplex gui display, N is up, E is left, for sky PA = 0.

The orientations of older instruments are recorded on a separate page.

Original text 1998 Oct 15, last revised 2010 Sep 21.



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Last modified: 17 September 2015