Telescope and dome
| Telescope overheads | Time |
|---|
| Target acquisition (imaging) | 4 min (max) |
| Target acquisition (spectroscopy) | 6 min (max) |
| Instruments change (echelle – single – photometry) | 30 s |
Instruments
Ondřejov Echelle spectrograph (OES)
Standard calibration exposure times
| OES Exposure | Time |
|---|
| Flat | 25 s |
| Dome-flat | 700 s |
| Comp | 5 s |
Single order spectrograph
Calibration exposures for different grating angles
| Center of the line | Gaia* | CA II | He I | Hα | Hβ | Hγ | Hδ |
| Flat | 15 s | 10 s | 10 s | 10 s | 5 s | 10 s | 40 s |
| Comp Th-Ar | 10 s | 10 s | 10 s | 10 s | 20 s | 40 s | 40 s |
* ‘Gaia’ corresponds to wevelengths 8400-8870 Å
- change of the grating position (maximum for any spectral region): 30 s
Photometric camera
- reading–out (binning 1×1): 10 s
- change of the photometric filters: 6 s
- photometric offsets: few seconds (depending on value of offset)
For any further questions about the telescope, instruments performance, or observational overheads, please write us to email proposal@asu.cas.cz.
