EMPOL: an EMCCD based optical imaging polarimeter
| Autor: | Archita Rai, Shashikiran Ganesh, Amish B. Shah, Pitamber Singh Patwal, Ashish Mishra, K. Aravind, Prashanth Kumar Kasarla, U. C. Joshi, S. N. Mathur, Namita Uppal, Kiran S. Baliyan, Sunil Chandra, Prachi Vinod Prajapati, Deekshya Roy Sarkar, Alka Singh |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
business.industry Detector Cassegrain reflector FOS: Physical sciences Polarimeter Field of view law.invention Telescope Optics law Dark nebula Prism business Focus (optics) Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) |
| DOI: | 10.48550/arxiv.2012.08768 |
| Popis: | An Andor 1K $\times$ 1K EMCCD detector has been used to develop an optical imaging polarimeter for use at the Cassegrain focus of 1.2 m telescope of PRL. The optics is derived from an older single-element detector instrument and consists of a rotating half-wave plate as modulator and a Foster prism as an analyser. The field of view of the instrument is 3 $\times$ 3 sq arcmin. We describe the instrument and the observational methodology in this document. Extensive observations have been carried out with this instrument covering a large variety of sources e.g. near-Earth asteroids, comets, Lynds dark nebulae, open clusters and AGN such as blazars. In the current communication, we discuss some results from the initial calibration runs while the other results will be presented elsewhere. Comment: 7 pages, 6 figures, Submitted to SPIE Conference Astronomical Telescopes + Instrumentation 2020 |
| Databáze: | OpenAIRE |
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