Journal
ASTRONOMICAL JOURNAL
Volume 161, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-3881/abc74f
Keywords
Observational astronomy; Polarimeters; Photometer; Polarimetry; High energy astrophysics; Black holes; Binary stars
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Funding
- Magnus Ehrnrooth foundation
- ERC Advanced Grant HotMol [ERC-2011-AdG-291659]
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The new instrument DIPol-UF features high precision, efficiency, and fast image readout, making it suitable for observing both bright and faint targets. Through remote control, high signal-to-noise observations have been obtained from nearby stars and X-ray binaries in their quiescent states.
We describe a new instrument capable of high-precision (10(-5)) polarimetric observations simultaneously in three passbands (BVR). The instrument utilizes electron-multiplying charge-coupled device (EM CCD) cameras for high efficiency and fast image readout. The key features of the Double Image Polarimeter-Ultra Fast (DIPol-UF) are: (i) the optical design with high throughput and inherent stability; (ii) great versatility, which makes the instrument optimally suitable for observations of bright and faint targets; and (iii) a control system, which allows the use of 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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