Astronomical instrumentation

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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
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Polycyclic Aromatic Hydrocarbon Emission in Galaxies as seen with JWST

(2024)

Authors:

Dimitra Rigopoulou, Fergus R Donnan, Ismael García-Bernete, Miguel Pereira-Santaella, Almudena Alonso-Herrero, Ric Davies, Leslie K Hunt, Patrick F Roche, Taro Shimizu
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Retrieval of the physical parameters of galaxies from WEAVE-StePS-like data using machine learning

(2024)

Authors:

J Angthopo, BR Granett, F La Barbera, M Longhetti, A Iovino, M Fossati, FR Ditrani, L Costantin, S Zibetti, A Gallazzi, P Sánchez-Blázquez, C Tortora, C Spiniello, B Poggianti, A Vazdekis, M Balcells, S Bardelli, CR Benn, M Bianconi, M Bolzonella, G Busarello, LP Cassarà, EM Corsini, O Cucciati, G Dalton, A Ferré-Mateu, R García-Benito, RM González Delgado, E Gafton, M Gullieuszik, CP Haines, E Iodice, A Ikhsanova, S Jin, JH Knapen, S McGee, A Mercurio, P Merluzzi, L Morelli, A Moretti, DNA Murphy, A Pizzella, L Pozzetti, R Ragusa, SC Trager, D Vergani, B Vulcani, M Talia, E Zucca
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Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS

(2024)

Authors:

Joost P Wardenier, Vivien Parmentier, Michael R Line, Megan Weiner Mansfield, Xianyu Tan, Shang-Min Tsai, Jacob L Bean, Jayne L Birkby, Matteo Brogi, Jean-Michel Désert, Siddharth Gandhi, Elspeth KH Lee, Colette I Levens, Lorenzo Pino, Peter CB Smith
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Exploring atmospheric optical turbulence: observations across zenith angles.

Applied optics 63:16 (2024) E48-E53

Authors:

LF Beesley, J Osborn, R Wilson, OJD Farley, R Griffiths, GD Love

Abstract:

We present measurements of the atmospheric optical turbulence as a function of zenith angle using two identical instruments, Shack-Hartmann Image Motion Monitors (SHIMMs), to measure atmospheric parameters concurrently. One instrument was pointed near zenith, while the other collected data by tracking a single star until it set and thus sampling zenith angles continuously to the horizon. By comparing these measurements, we can attribute changes in the atmospheric parameters to the changing zenith angle rather than variations in local turbulence conditions. The primary purpose of this experiment is to make comparisons between the measurements of the scintillation index, σ I2, and Fried parameter, r 0, with current theories. In this demonstration, we find that there is a strong agreement between the models and the instrument up until zenith angles of 70∘, above which model and measurements begin to deviate. We discuss various ways in which limitations in models and our instrument may cause these deviations.
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