Shashikiran Ganeshhttps://orcid.org/0000-0002-7721-3827,1 Archita Rai,1,2 Aravind K.,1,2 Alka Singh,1 Prachi Vinod Prajapati,1 Ashish Mishra,3 Prashanth Kasarla,1 Deekshya Roy Sarkar,1 Pitamber Singh Patwal,1 Namita Uppal,1,4 Sunil Chandra,5 Satyanarain Mathur,1 Amish B. Shah,1 Kiran S. Baliyan,1 U. C. Joshi1
1Physical Research Lab. (India) 2Indian Institute of Technology Gandhinagar (India) 3The Univ. of Toledo (United States) 4Indian Institute of Technology, Gandhinagar (India) 5North-West Univ. (South Africa)
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An Andor 1K x 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 3x3 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.
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Shashikiran Ganesh, Archita Rai, Aravind K., Alka Singh, Prachi Vinod Prajapati, Ashish Mishra, Prashanth Kasarla, Deekshya Roy Sarkar, Pitamber Singh Patwal, Namita Uppal, Sunil Chandra, Satyanarain Mathur, Amish B. Shah, Kiran S. Baliyan, U. C. Joshi, "EMPOL: an EMCCD based optical imaging polarimeter," Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114479E (13 December 2020); https://doi.org/10.1117/12.2560949