On-ground flat-field calibration of the Metis coronagraph onboard the Solar Orbiter ESA mission
- Casini, C.
- da Deppo, V.
- Zuppella, P.
- Chioetto, P.
- Slemer, A.
- Frassetto, F.
- Romoli, M.
- Landini, F.
- Pancrazzi, M.
- Andretta, V.
- De Leo, Y.
- Bemporad, A.
- Fabi, M.
- Fineschi, S.
- Frassati, F.
- Grimani, C.
- Jerse, G.
- Heerlein, K.
- Liberatore, A.
- Magli, E.
- Naletto, G.
- Nicolini, G.
- Pelizzo, M.
- Romano, P.
- Sasso, C.
- Spadaro, D.
- Stangalini, M.
- Straus, T.
- Susino, R.
- Teriaca, L.
- Uslenghi, M.
- Casti, M.
- Heinzel, P.
- Volpicelli, A.
DOIAbstract
Solar Orbiter, launched on February 9th 2020, is an ESA/NASA mission conceived to study the Sun. This work presents the embedded Metis coronagraph and its on-ground calibration in the 580-640 nm wavelength range using a flat field panel. It provides a uniform illumination to evaluate the response of each pixel of the detector; and to characterize the Field of View (FoV) of the coronagraph. Different images with different exposure times were acquired during the on- ground calibration campaign. They were analyzed to verify the linearity response of the instrument and the requirements for the FoV: the maximum area of the sky that Metis can acquire