RoboPol: A four-channel optical imaging polarimeter

Tutkimustuotos: Lehtiartikkelivertaisarvioitu


  • 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
  • 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


  • Inter-University Centre for Astronomy and Astrophysics India
  • California Institute of Technology
  • Foundation for Research and Technology-Hellas
  • University of Crete
  • St. Petersburg State University
  • Max Planck Institute for Radio Astronomy
  • University of Turku
  • Nicolaus Copernicus University in Toruń
  • Stanford University


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.


JulkaisuMonthly Notices of the Royal Astronomical Society
TilaJulkaistu - 15 helmikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 34947506