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MOPTOP: Multi-colour Optimised Optical Polarimeter

Published online by Cambridge University Press:  23 June 2017

Helen Jermak ,
Iain A. Steele  and
Robert J. Smith
Helen Jermak
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool, L3 5RF, UK. email: [email protected], [email protected] Dept. of Physics, Lancaster University, Bailrigg Campus, Lancaster, LA1 4YW, UK. email: [email protected]
Iain A. Steele
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool, L3 5RF, UK. email: [email protected], [email protected]
Robert J. Smith
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool, L3 5RF, UK. email: [email protected], [email protected]
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Abstract

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Polarimetric measurements are essential for the study of jetted sources associated with black holes, such as γ-ray bursts and blazars. The relativistic jets launched from regions close to the black hole are threaded with magnetic fields, which produce synchrotron emission, and can be studied with polarimetric measurements. The multi-colour, optimised, optical polarimeter (MOPTOP) is a multi-band imaging instrument designed for use on the Liverpool Telescope. By replacing the rotating polaroid with a half wave plate and beam splitter, the instrument utilises twice as much of the incoming beam of light from the telescope compared to its predecessor, Ringo3. MOPTOP also builds on the successful introduction of dichroic mirrors to perform simultaneous multi-waveband polarimetric and photometric analysis in Ringo3, and enhances the sensitivity of the instrument with sCMOS cameras to use all photons as efficiently as possible.

Keywords

polarizationinstrumentation: polarimeterstechniques: polarimetricetc
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 357 - 358
Copyright
Copyright © International Astronomical Union 2017 

References

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Mundell, C. G., Kopač, D., Arnold, D. M., et al. 2013, Nature, 504, 119 Google Scholar
Steele, I. A., Smith, R. J., Rees, P. C., et al. 2004, in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, Vol. 5489, Ground-based Telescopes, ed. Oschmann, J. M. Jr., 679–692 Google Scholar