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Shrestha, M, Steele, IA, Piascik, AS, Jermak, HE, Smith, RJ and Copperwheat, CM Characterization of a dual-beam, dual-camera optical imaging polarimeter. Monthly Notices of the Royal Astronomical Society. ISSN 0035-8711 (Accepted)
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Abstract
Polarization plays an important role in various time-domain astrophysics to understand the magnetic fields, geometry, and environments of spatially unresolved variable sources. In this paper we present the results of laboratory and on-sky testing of a novel dual-beam, dual-camera optical imaging polarimeter (MOPTOP) exploiting high sensitivity, low-noise CMOS technology and designed to monitor variable and transient sources with low systematic errors and high sensitivity. We present a data reduction algorithm that corrects for sensitivity variations between the cameras on a source-by-source basis. Using our data reduction algorithm, we show that our dual-beam, dual-camera technique delivers the benefits of low and stable instrumental polarization ($<0.05$\% for lab data and $<0.25$\% for on sky data) and high throughput while avoiding the additional sky brightness and image overlap problems associated with dual-beam, single-camera polarimeters.
| Item Type: | Article |
|---|---|
| Additional Information: | This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Manisha Shrestha, Iain A Steele, Andrzej S Piascik, Helen Jermak, Robert J Smith, Chris M Copperwheat, Characterization of a dual-beam, dual-camera optical imaging polarimeter, Monthly Notices of the Royal Astronomical Society, , staa1049, https://doi.org/10.1093/mnras/staa1049 is available online at: https://dx.doi.org/10.1093/mnras/staa1049 |
| Uncontrolled Keywords: | astro-ph.IM; astro-ph.IM |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | Oxford University Press |
| Related URLs: | |
| Date Deposited: | 27 Apr 2020 09:52 |
| Last Modified: | 27 Apr 2020 10:00 |
| DOI or Identification number: | 10.1093/mnras/staa1049 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/12835 |
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