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Bright-Moon sky as a wide-field linear Polarimetric flat source for calibration

Maharana, S. (författare)
South African Astronomical Observatory,Panepistimio Kritis,University of Crete,Inter-University Centre for Astronomy and Astrophysics (IUCAA),Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
Kiehlmann, S. (författare)
Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
Blinov, D. (författare)
Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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Pelgrims, V. (författare)
Panepistimio Kritis,University of Crete,Université libre de Bruxelles (ULB),Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
Pavlidou, V. (författare)
Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
Tassis, Konstantinos (författare)
Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
Kypriotakis, J. A. (författare)
Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
Ramaprakash, A. N. (författare)
Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),California Institute of Technology (Caltech),Inter-University Centre for Astronomy and Astrophysics (IUCAA)
Anche, R. M. (författare)
University of Arizona
Basyrov, A. (författare)
Universitetet i Oslo,University of Oslo
Deka, K. (författare)
Homi Bhabha National Institute (HBNI)
Eriksen, H. K. (författare)
Universitetet i Oslo,University of Oslo
Ghosh, T. (författare)
Homi Bhabha National Institute (HBNI)
Gjerløw, E. (författare)
Universitetet i Oslo,University of Oslo
Mandarakas, N. (författare)
Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
Ntormousi, E. (författare)
Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
Panopoulou, Georgia, 1989 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Papadaki, A. (författare)
Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
Pearson, T. J. (författare)
California Institute of Technology (Caltech)
Potter, S. B. (författare)
University of Johannesburg,South African Astronomical Observatory
Readhead, A. C.S. (författare)
California Institute of Technology (Caltech),Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
Skalidis, R. (författare)
California Institute of Technology (Caltech)
Wehus, I. K. (författare)
Universitetet i Oslo,University of Oslo
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 (creator_code:org_t)
2023
2023
Engelska.
Ingår i: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 679
Relaterad länk:
https://research.cha... (primary) (free)
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https://doi.org/10.1...
https://research.cha...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Context. Next-generation wide-field optical polarimeters such as Wide-Area Linear Optical Polarimeters (WALOPs) have a field of view (FoV) of tens of arcminutes. Wide-field polarimetric flat sources are essential to the efficient and accurate calibration of these instruments. However, no established wide-field polarimetric standard or flat sources exist at present. Aims. This study tests the feasibility of using the polarized sky patches of the size of around 10 × 10 arcminutes2, at a distance of up to 20 from the Moon, on bright-Moon nights as a wide-field linear polarimetric flat source. Methods. We observed 19 patches of the sky adjacent to the bright-Moon with the RoboPol instrument in the SDSS-r broadband filter. These patches were observed on five nights within two days of the full-Moon across two RoboPol observing seasons. Results. We find that for 18 of the 19 patches, the uniformity in the measured normalized Stokes parameters q and u is within 0.2%, with 12 patches exhibiting uniformity within 0.07% or better for both q and u simultaneously, making them reliable and stable wide-field linear polarization flats. Conclusions. We demonstrate that the sky on bright-Moon nights is an excellent wide-field linear polarization flat source. Various combinations of the normalized Stokes parameters q and u can be obtained by choosing suitable locations of the sky patch with respect to the Moon.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Nyckelord

Moon
Techniques: polarimetric
Atmospheric effects
Instrumentation: polarimeters

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art (ämneskategori)
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