Table 1
Typical narrow off-axis offsetting sequence for a planet observation.
| Relative offset | Exposure offset | |||
|---|---|---|---|---|
| (from template) | (in fits header) | |||
| RA (m″) | Dec (m″) | RA (m″) | Dec (m″) | Target |
| 0 | 0 | 0 | 0 | Star |
| +284 | +462 | +284 | +462 | Planet |
| −568 | −924 | −284 | −462 | Anti-planet |
| +568 | +924 | +284 | +462 | Planet |
Notes. The planet is located at (284 mas, 462 mas) offset from its host star. The relative offsets in RA and Dec, specified in the observation template, have as many entries as requested exposure cycles, four in the presented sequence. The cumulated offset is reported in FITS header under keywords SEQ.OFFSET.ALPHA and SEQ.OFFSET.DELTA. This sequence corresponds to the publicly available commissioning dataset on β Pictoris b (see http://www.eso.org/sci/activities/instcomm/matisse.html, Run ID: 60.A-9257(H)). The intent of the offset sequence was to observe the planet, calibrate it with the star, and investigate off-axis stellar leakage at the anti-planet position.
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.