Papers › DIPol-UF: simultaneous three-color (BVR) polarimeter with EM CCDs

DIPol-UF: simultaneous three-color (BVR) polarimeter with EM CCDs

4 Nov 2020arXiv:2011.02129links table onlyarchive 2025-07-28

Vilppu Piirola, Ilia A. Kosenkov, Andrei V. Berdyugin, Svetlana V. Berdyugina, Juri Poutanen

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We describe a new instrument capable of high precision (10⁻⁵) polarimetric observations simultaneously in three passbands (BVR). The instrument utilizes electron-multiplied EM CCD cameras for high efficiency and fast image readout. The key features of DIPol-UF are: (i) optical design with high throughput and inherent stability; (ii) great versatility which makes the instrument optimally suitable for observations of bright and faint targets; (iii) control system which allows using the polarimeter remotely. Examples are given of the first results obtained from high signal-to-noise observations of bright nearby stars and of fainter sources such as X-ray binaries in their quiescent states

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