Open Access
Table 2
Summary of the daytime calibrations, target acquisition, and science observations.
| Calibration/step | Purpose | Sub-system | Duration (min) | Sections |
|---|---|---|---|---|
| Daytime calibrations | ||||
| Tip-tilt mirror linearity | Monitoring | FIM | 2 | 4.1.1 |
| Interpolation function | Positioning of the science PSF on the detector | FIM | 10 | 4.1.1 |
| Interaction matrix | Positioning of the science PSF on the detector | FIM | 2 | 4.1.1 |
| Injection map | Position of centering fiber in tip-tilt space | FIM | 2 | 4.1.1 |
| Centering optimization | Position of science fiber in tip-tilt space | Full system | 2 | 4.1.2 |
| Fibers trace | Position of the signal on the science detector | Full system | 2 | 4.1.2 |
| Target acquisition | ||||
| MACAO acquisition | Closing the loop on MACAO | FIM + MACAO | 2 | 4.2 |
| SPHERE acquisition | Telescope pointing and AO optimization | SPHERE | 10 | 4.2 |
| Switch to internal source | FIM acquisition setup | SPHERE | < 1 | 4.2 |
| Injection map | Position of centering fiber in tip-tilt space | FIM | 2 | 4.2 |
| Centering optimization | Position of science fiber in tip-tilt space | Full system | 2 | 4.2 |
| Tracking camera acquisition | Reference position of science fiber on detector | FIM | < 1 | 4.2 |
| Blind offset | Positioning companion’s PSF on science fiber | FIM | < 1 | 4.2 |
| Switch back to sky | End of FIM acquisition | SPHERE | < 1 | 4.2 |
| Modal gains optimization | Performance optimization | SPHERE | 2 | 4.2 |
| Science observations | ||||
| Science data acquisition | Acquisition of spectra | CRIRES | Hours | 4.3 |
| Continuous tracking | Maintaining the companion’s PSF on S fiber | FIM | 4.3 | |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.