optics:
 optical design
| Â ritchey-chretien
| Â primary mirror
| Â hyperbolic, 500mm diameter
| Â secondary mirror
| Â hyperbolic,180mm diameter (incl baffle)
| |  glass/coating |  low-expansion borosilicate glass with enhanced aluminium coating (>96% reflectivity) and SiO2 protective overcoating
| Â system focal length
| Â 5000mm | Â focal ratio
| Â f/10 | | Â platescale | Â 41.25 arcsec/mm | Â optical quality
| Â 1/5 lambda ptv, 1/30 lambda rms (whole system)
|
dome/mount:
| Â latitude | Â 28 45 38.3 N | | Â longitude | Â 17 52 53.9 W
| | Â altitude | Â 2332m (ground floor of WHT, but dome is on the roof)
| | Â dome | Â 12ft non-rotating clamshell
| | Â mount | Â direct-drive, zero-backlash german equatorial
| Â slew speed
| Â 20 degree/sec
| Â all-sky pointing accuracy
| Â <5 arcsec
| Â blind-offset accuracy
| Â <1 arcsec
| Â tracking accuracy
| Â <1 arcsec/120 min
|
science ccd:
| Â detector | Â Kodak KAF-3200ME CCD
| | Â format | Â 2184x1472 image pixels
| Â pixel size
| Â 6.8 microns / 0.28 arcsec/pixel
| | Â fov | Â 10.2x6.9 arcmin
| | Â qe | Â UBVRI: 40/70/80/80/50% approx
| Â full well depth
| Â 55000 e-, no anti-blooming
| Â dark current
| Â <0.5e- at 0 degC, <0.05e- at -25 degC
| Â readout noise
| Â 7e- | | Â cte | Â >0.99999 | | Â gain | Â 1.3 e-/ADU
| | Â adc | Â 16 bits
| Â dead time
| Â <8 sec full-frame unbinned
| | Â shutter | Â mechanical, 0.03 sec to 240 min
| Â integral filter wheel
| Â 5-position, 1.25 inch filters
| Â tec cooling
| Â to -40 degC
|
finder:
| Â detector | Â ICX248AL EXview HAD CCD | | Â format | Â 795x596 image pixels
| Â pixel size
| Â 9 microns / 32.6 arcsec/pixel
| | Â fov | Â 7.2x5.4 degrees
| | Â adc | Â 10 bits
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