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RoboPol: a four-cha...
RoboPol: a four-channel optical imaging polarimeter
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- Ramaprakash, A. N. (författare)
- Inter-University Centre for Astronomy and Astrophysics (IUCAA)
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- Panopoulou, Georgia, 1989 (författare)
- California Institute of Technology (Caltech)
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al., et (författare)
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(creator_code:org_t)
- 2019
- 2019
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966.
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- We present the design and performance of RoboPol, a four-channel optical polarimeter operating at the Skinakas Observatory in Crete, Greece. RoboPol is capable of measuring both relative linear Stokes parameters q and u (and the total intensity I) in one sky exposure. Though primarily used to measure the polarization of point sources in the R band, the instrument features additional filters (B, V, and I), enabling multiwavelength imaging polarimetry over a large field of view (13.6' × 13.6'). We demonstrate the accuracy and stability of the instrument throughout its 5 yr of operation. Best performance is achieved within the central region of the field of view and in the R band. For such measurements the systematic uncertainty is below 0.1 per cent in fractional linear polarization, p (0.05 per cent maximum likelihood). Throughout all observing seasons the instrumental polarization varies within 0.1 per cent in p and within ∼1° in polarization angle.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- instrumentation: polarimeters
- Astrophysics - Instrumentation and Methods for Astrophysics
- techniques: polarimetric
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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