A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
RoboPol: a four-channel optical imaging polarimeter
Tekijät: A. N. Ramaprakash, C. V. Rajarshi, H. K. Das, P. Khodade, D. Modi, G. Panopoulou, S. Maharana, D. Blinov, E. Angelakis, C. Casadio, L. Fuhrmann, T. Hovatta, S. Kiehlmann, O. G. King, N. Kylafis, A. Kougentakis, A. Kus, A. Mahabal, A. Marecki, I. Myserlis, G. Paterakis, E. Paleologou, I. Liodakis, I. Papadakis, I. Papamastorakis, V. Pavlidou, E. Pazderski, T. J. Pearson, A. C. S. Readhead, P. Reig, A. Słowikowska, K. Tassis, J. A. Zensus
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2019
Journal: Monthly Notices of the Royal Astronomical Society
Lehden akronyymi: MON NOT R ASTRON SOC
Vuosikerta: 485
Numero: 2
Aloitussivu: 2355
Lopetussivu: 2366
Sivujen määrä: 12
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stz557
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/41438532
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' x 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 similar to 1 degrees in polarization angle.
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