Speaker
Description
Euclid is a European Space Agency mission on satellite, whose aim is to investigate the so-called “dark universe” (dark matter and dark energy) and strongly constrain the main cosmological parameters. In order to satisfy the scientific mission requirements, an extensive calibration procedure must be performed both on the ground and in flight.
The same source in the sky can be recorded with a different count-rate depending on its position within the Focal Plane (FP) because of a non uniform transmission of the light introduced by the telescope optics. Since this distortion can vary during the mission time, due to the variation of the environmental space conditions and outgassing, a monthly in-flight Self-Calibration will be required. This procedure allows reconstructing the illumination variation through multiple observations of the same sources in different positions of the FP.
We present a method for the selection of the optimal telescope pointing pattern for the Euclid Self-Calibration, the key point being the proper sampling of the spatial scales of interest (above a hundred pixels) that can be quantified looking at the distributions of the source records on the FP.
| In-person participation | Yes |
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