| Arrays: |
4 2048x2048 Loral-Lesser thinned CCDs
(CCD7/10/11/12) |
| Pixel size/scale: |
15µ, 0.217"/pixel on sky (2x2 binning) |
| QE |
75% @ 370nm; 97% @ 430nm; 92% @ 535nm; 83% @ 630nm; 63% @ 780 |
| Read-noise: |
~6.5 e-/pixel (see quality monitoring for latest measurement) |
| Gain: |
~1.30 e-/ADU (see quality monitoring for latest measurement) |
| Linearity |
2x2 binning: Very good, non-linearity below 0.2%over the whole range for all CCDs;
1x1 binning: Very good apart from the bottom right hand corner of the top left CCD see also test report |
| Dark current |
~2e-/h/pixel (1x1 binning), a couple of areas of hot pixels
(in detail) |
| Field of view: |
7.7' x 7.7' |
| The gaps between the detectors: |
9-12" |
| Minimum exposure time |
0.5 seconds |
| Typical bias level |
~250 - 400 ADU (see quality monitoring for latest measurement) |
| Orientation |
TCS field=-90 North-up East-left |
| Read-out time |
37 seconds, 2x2 binning: 113 seconds 1x1 binning |
| Filters |
Full field of view with 100 mm filter, 60mm round filter
FOV about 5'25" (diameter) Available filters: (100 mm) Bessell UBVRI, SDSS u'g'r'i'z';(90mm) Str�mgren uvby, H-beta wide, narrow (see
filters at NOT)
|
| Zero points |
U 24.6, B 26.2, V 26.0, R 25.7, I 25.2 (Exposure time calculator) |
| Default focus |
23250 (UBVRI), ( for all CCDs) |
| Default focus offset |
from MOSCA R to StanCam R -100 |
