Wide Field Imager

CCD specification - dimensions and formats

This mosaic is made of 8 EEV 44-82 backside illuminated CCDs and 1 device for tracking. All the 8 CCDs have also NICKNAMES.

North

Tracker
CCD

EDITH
CCD # 50

ELLA
CCD # 51
FRANKIE
CCD # 52
MICHAEL
CCD # 53
West

BOY
GEORGE
CCD # 57

PRISCILLA
CCD # 56

ELTON
CCD # 55
NINA
CCD # 54

WFI mosaic - physical view:
Note the difference of AR coating thickness yielding to different CCD colors and different quantum efficiency performances.

A wall of CCD storage boxes ...

Physical layout

Mosaic dimensions

Horizontal gaps between two CCDs, 8 rows are lost to allow consistent binning 3 x 3.

Vertical gaps between two CCDs, 2 columns are lost to allow consistent binning 3 x 3.

Angles

North
Tracker CCD	EDITH CCD # 50	ELLA CCD # 51	FRANKIE CCD # 52	MICHAEL CCD # 53	West
	9	11	4	0.5
	X=0 (ref) Y=0 (ref)	X=0 (ref) DY=1	X=0 (ref) DY=NM	X=0 (ref) DY=10
	RA= 01m41.467s DEC=4.020"	RA= 01m07.38s DEC=4.220"	RA=33.35s DEC=3.93"	RA=0 (Ref) DEC=0 (Ref)
	B.GEORGE CCD # 57	PRISCILLA CCD # 56	ELTON CCD # 55	NINA CCD # 54
	13.7	10.8	0 (ref)	-7.4
	DX=-2 Y=0 (ref)	DX=NM DY=-0.5	DX=4 DY=-3	DX=10 DY=-3
	RA= 01m41.432s DEC= 16'25.1"	RA= 01m07.38s DEC=16'24.99"	RA=33.28s DEC=16'24.41"	RA=0.93s DEC=16'24.51"

CCD orientations: Bold in pink background values give the tilt angle wrt to the north (arcmin), computed with USNO A2.0 catalog. Mean CCD rotation value is 8 arcmin, for position the reference pixel is 1,1.
(Data from Feb 18, 2000)

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Last update: Mar 16, 2004
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