Dr Siddharth Maharana: Publications

The WALOP-North Instrument I: Optical Design, Filter Design, Calibration

ArXiv 2412.00964 (2024)

Authors:

John A Kypriotakis, Siddharth Maharana, Ramya M Anche, Chaitanya V Rajarshi, AN Ramaprakash, Bhushan Joshi, Artem Basyrov, Dmitry Blinov, Tuhin Ghosh, Eirik Gjerlow, Sebastian Kiehlmann, Nikolaos Mandarakas, Georgia V Panopoulou, Katerina Papadaki, Vasiliki Pavlidou, Timothy J Pearson, Vincent Pelgrims, Stephen B Potter, Anthony CS Readhead, Raphael Skalidis, Konstantinos Tassis

Wide Area Linear Optical Polarimeter North instrument I: Optical design, filter design, and calibration

Journal of Astronomical Telescopes, Instruments, and Systems 10:4 (2024)

Authors:

JA Kypriotakis, S Maharana, RM Anche, CV Rajarshi, A Ramaprakash, B Joshi, A Basyrov, D Blinov, T Ghosh, E Gjerløw, S Kiehlmann, N Mandarakas, GV Panopoulou, K Papadaki, V Pavlidou, TJ Pearson, V Pelgrims, SB Potter, ACS Readhead, R Skalidis, K Tassis

Abstract:

The Wide Area Linear Optical Polarimeter North is an optical polarimeter designed for the needs of the Polar-Areas Stellar Imaging in Polarimetry High-Accuracy Experiment survey. It will be installed on the 1.3-m telescope at the Skinakas Observatory in Crete, Greece. After commissioning, it will measure the 30×30 arcmin2 polarization of millions of stars at high galactic latitude, aiming to measure hundreds of stars per square degree. The astronomical filter used in the instrument is a modified, polarimetrically neutral broadband Sloan Digital Sky Survey-r. This instrument will be a pioneering one due to its large field of view (FoV) of and high-accuracy polarimetry measurements. The accuracy and sensitivity of the instrument in polarization fraction will be at the 0.1% and 0.05% levels, respectively. Four separate 4k×4k charge-coupled devices will be used as the instrument detectors, each imaging one of the 0-, 45-, 90-, and 135-deg polarized FoV separately, therefore making the instrument a four-channel, one-shot polarimeter. Here, we present the overall optical design of the instrument, emphasizing the aspects of the instrument that are different from Wide Area Linear Optical Polarimeter South. We also present a customized design of filters appropriate for polarimetry along with details on the management of the instrument size and its polarimetric calibration.

Improving polarimetric accuracy of RoboPol to $<$ 0.05 % using a half-wave plate calibrator system

ArXiv 2407.1347 (2024)

Authors:

Siddharth Maharana, Dmitry Blinov, AN Ramaprakash, Vasiliki Pavlidou, Konstantinos Tassis

FiberPol-6D: Spectropolarimetric Integral Field mode for the SAAO 1.9 m Telescope using fibers

ArXiv 2406.19124 (2024)

Authors:

Siddharth Maharana, Sabyasachi Chattopadhyay, Matthew Bershady

Systems design, assembly, integration and lab testing of WALOP-South Polarimeter

ArXiv 2406.19428 (2024)

Authors:

Siddharth Maharana, AN Ramaprakash, Chaitanya Rajarshi, Pravin Khodade, Bhushan Joshi, Pravin Chordia, Abhay Kohok, Ramya M Anche, Deepa Modi, John A Kypriotakis, Amit Deokar, Aditya Kinjawadekar, Stephen B Potter, Dmitry Blinov, Hans Kristian Eriksen, Myrto Falalaki, Hitesh Gajjar, Tuhin Ghosh, Eirik Gjerløw, Sebastain Kiehlmann, Ioannis Liodakis, Nikolaos Mandarakas, Georgia V Panopoulou, Vasiliki Pavlidou, Timothy J Pearson, Vincent Pelgrims, Anthony CS Readhead, Raphael Skalidis, Konstantinos Tassis, Namita Uppal, Ingunn K Wehus

91̽��