Intranet(staff only)

The Sky Mapper Instrument

32 4x2k CCDs
Off-Axis Guider
Shack-Hartmann feed
Cooled with closed cycle cryogenic system
6 filter slots
StarGrasp controller for CCD readout

Goals:

CCDs:

20s readout
5e- readnoise
125000e- full well
linearity to 0.5%
QE > 60% (400-850nm), QE > 20% (300-950nm)

Shutter Accuracy: 1% on 1second exposure

Filter Exchange time: 20s

The following figure shows the expected throughput of the instrument plus detectors not including atmospheric extinction compared to the Sloan Digital Sky Survey instrumentation (black curve).

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	Research School of Astronomy and Astrophysics Mount Stromlo and Siding Spring Observatories ANU College of Science