SkyMapper Main Survey
Most of SkyMapper's observing time is now dedicated to the Main Survey. This has an expected depth (in AB mags) for a signal-to-noise ratio of 5 in 2.5" seeing, of:
| u | v | g | r | i | z | |
|---|---|---|---|---|---|---|
| Single epoch | 19.5 | 19.5 | 21.0 | 21.0 | 20.0 | 19.0 |
| Saturation | 10.0 | 10.5 | 13.0 | 13.0 | 11.0 | 10.5 |
| Exp. time (s) | 100 | 100 | 100 | 100 | 100 | 100 |
| Final coadded depth | 20.5 | 20.5 | 21.7 | 21.7 | 20.7 | 19.7 |
The survey scheduler aims to finish a field mostly within one moon period. A first visit in dark conditions establishes a colour sequence with all six bands observed in the space of 20 minutes. Further visits in subsequent nights under dark or grey sky conditions add exposure pairs in g- and r-band, while in grey or bright conditions pairs in i- and z-band are added. A second colour sequence in dark conditions finishes the set. Further pairs in i- and z-band are also observed during astronomical twilight. These twilight observations may be separated by many months from the night-time visits.
Progress & Statistics
Survey Progress
Survey FWHM Statistics
Survey Completion Map
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