Summary
This document describes the layout of the DEIMOS CCD mosaic,
indicating which devices and which amplifiers are in which
locations in the focal plane in both Direct and Spectral readout
modes. It also depicts the image as displayed on the ds9 image
display clients at Keck.
Spectral Mode
ds9 Displayed Layout
Notes
- Numbers in red correspond to video input number (VIDINP)
- Names in cyan are CCD device names (CCDNAME)
Image Organization
| Extension |
VIDEOINP |
AMPLOC |
AMPTYPE |
CCDLOC |
CCDNAME |
| 1 |
2 |
1 |
B |
1 |
14-2-6 |
| 2 |
4 |
3 |
B |
2 |
14-12-3 |
| 3 |
6 |
5 |
B |
3 |
14-10-6 |
| 4 |
8 |
7 |
B |
4 |
14-10-5 |
| 5 |
10 |
10 |
B |
5 |
14-4-1 |
| 6 |
12 |
12 |
B |
6 |
14-4-3 |
| 7 |
14 |
14 |
B |
7 |
14-4-2 |
| 8 |
16 |
16 |
B |
8 |
14-5-2 |
DEIMOS Spectral Mode CCD Mosaic Image Format
Notes
- Extension: Number of the image extension (header data
unit or HDU) in which the data are written, where HDU 0 is the
primary HDU.
- VIDEOINP: Video Input
- AMPLOC: CCD amplifier number
- AMPTYPE: CCD amplifier type (A or B)
- CCDLOC: CCD number within the mosaic (1-8)
- CCDNAME: CCD device name
Direct Mode
ds9 Displayed Layout (at Keck)
Notes
- Numbers in red correspond to video input number (VIDINP)
- Names in cyan are CCD device names (CCDNAME)
- Recent versions of ds9 display DEIMOS direct-mode images
flipped in X relative to the spectral-mode images; to see the
correct orientation, select the Invert X option.
Image Organization
| Extension |
VIDEOINP |
AMPLOC |
AMPTYPE |
CCDLOC |
CCDNAME |
| 1 |
1 |
2 |
A |
1 |
14-2-6 |
| 2 |
2 |
1 |
B |
1 |
14-2-6 |
| 3 |
3 |
4 |
A |
2 |
14-12-3 |
| 4 |
4 |
3 |
B |
2 |
14-12-3 |
| 5 |
5 |
6 |
A |
3 |
14-10-6 |
| 6 |
6 |
5 |
B |
3 |
14-10-6 |
| 7 |
7 |
8 |
A |
4 |
14-10-5 |
| 8 |
8 |
7 |
B |
4 |
14-10-5 |
DEIMOS Direct Mode CCD Mosaic Image Format
Notes
- Extension: Number of the image extension (header data
unit or HDU) in which the data are written, where HDU 0 is the
primary HDU.
- VIDEOINP: Video Input
- AMPLOC: CCD amplifier number
- AMPTYPE: CCD amplifier type (A or B)
- CCDLOC: CCD number within the mosaic (1-8)
- CCDNAME: CCD device name