| 1 | == P3.15 Flux calibration (off-centered target observation) == |
| 2 | • **Phase** : 3 |
| 3 | • **Status** : Draft |
| 4 | • **Category** : Nighttime testing (functionality and operability) (C4) |
| 5 | • **Recurrence** : once at commissioning and then on request for deep coronagraphic observations. |
| 6 | • **Duration** : 20 minutes |
| 7 | **Description** |
| 8 | • Flux calibration to allow contrast estimation between the central star and a close companion, by measuring the star flux out of the coronagraph |
| 9 | **Prerequisites** |
| 10 | • Authorize SHARK-NIR on the SX side. |
| 11 | • Atmospheric conditions: AO working conditions. |
| 12 | • Bad pixel map, Background or Dark, Flat-field, distortion map |
| 13 | **Procedure** |
| 14 | • On target, the same set-up as an observation on science target; AO closed-loop, ND for bright targets to prevent detector saturation, the star behind coronagraph centered and off-centered keeping the stop. The derotator mode should be tracking the field with possible adjustment of the angle to prevent the star from rotating around the coronagraph. |
| 15 | • Observe a star with the coronagraphic devices, after an offset of 0.5” is applied. |
| 16 | **Success criteria** |
| 17 | • Flux: 0.1 mag |
| 18 | **Notes** |
| 19 | • Same as activity 7.2 in AD4 |
| 20 | **LBTO support** |
| 21 | • Support from LBTI/LBTO? |
| 22 | **Associated SHARK-NIR personnel** |
| 23 | • JF, LM, MdP |
| 24 | **Date performed and by whom** |