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Paper: CALAS, A Camera for the Large-scale of the Solar Surface
Volume: 346, Large-scale Structures and their Role in Solar Activity
Page: 53
Authors: Meunier, N.; Rondi, S.; Tkaczuk, R.; Rieutord, M.; Beigbeder, F.
Abstract: The origin of supergranulation (convective or not) is still much debated. Among various possible approaches, one way to study supergranulation is to observe the horizontal motions of granules. A combination of a very large field-of-view (in order to see as many supergranules as possible), a very high spatial resolution (to sample granules with a high accuracy, even the small ones) and a high cadence is necessary to study this pattern in detail. We plan to implement a 4k×4k CMOS camera at the Lunette Jean Rösch (previously Coupole Tourelle) at the Pic du Midi Observatory (a 50 cm diameter refractor). The main objective of the camera, CALAS (Camera for the Large Scale of the Solar Surface), is the study of supergranulation. This will allow to sample granules with a high spatial resolution on a 10′ ×10′ field-of-view (∼ 100 supergranules). We present our objectives, the instrumental set-up and organization, and the status of the instrument.
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