Extremely Large Telescope

Research group

Research theme

Sub department

About

Related research groups

RoboPol: a four-channel optical imaging polarimeter

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 485:2 (2019) 2355-2366

Authors:

AN Ramaprakash, CV Rajarshi, HK Das, P Khodade, D Modi, G Panopoulou, S Maharana, D Blinov, E Angelakis, C Casadio, L Fuhrmann, T Hovatta, S Kiehlmann, OG King, N Kylafis, A Kougentakis, A Kus, A Mahabal, A Marecki, I Myserlis, G Paterakis, E Paleologou, I Liodakis, I Papadakis, I Papamastorakis, V Pavlidou, E Pazderski, TJ Pearson, ACS Readhead, P Reig, A Słowikowska, K Tassis, JA Zensus

Abstract:

ABSTRACT We present the design and performance of RoboPol, a four-channel optical polarimeter operating at the Skinakas Observatory in Crete, Greece. RoboPol is capable of measuring both relative linear Stokes parameters q and u (and the total intensity I) in one sky exposure. Though primarily used to measure the polarization of point sources in the R band, the instrument features additional filters (B, V, and I), enabling multiwavelength imaging polarimetry over a large field of view (13.6′ × 13.6′). We demonstrate the accuracy and stability of the instrument throughout its 5 yr of operation. Best performance is achieved within the central region of the field of view and in the R band. For such measurements the systematic uncertainty is below 0.1 per cent in fractional linear polarization, p (0.05 per cent maximum likelihood). Throughout all observing seasons the instrumental polarization varies within 0.1 per cent in p and within ∼1° in polarization angle.
More details from the publisher
More details

Detecting Earth-like Biosignatures on Rocky Exoplanets around Nearby Stars with Ground-based Extremely Large Telescopes

\baas 51 (2019) 3

Authors:

Mercedes Lopez-Morales, Thayne Currie, Johanna Teske, Eric Gaidos, Eliza Kempton, Jared Males, Nikole Lewis, Benjamin V Rackham, Sagi Ben-Ami, Jayne Birkby, David Charbonneau, Laird Close, Jeff Crane, Courtney Dressing, Cynthia Froning, Yasuhiro Hasegawa, Quinn Konopacky, Ravi K Kopparapu, Dimitri Mawet, Bertrand Mennesson, Ramses Ramirez, Deno Stelter, Andrew Szentgyorgyi, Ji Wang, Munazza Alam, Karen Collins, Andrea Dupree, Margarita Karovska, James Kirk, Amit Levi, Chima McGruder, Chris Packman, Sarah Rugheimer, Surangkhana Rukdee

Directly Imaging Rocky Planets from the Ground

\baas 51 (2019) 3

Authors:

Ben Mazin, E Artigau, V Bailey, C Baranec, C Beichman, B Benneke, J Birkby, T Brandt, J Chilcote, M Chun, L Close, T Currie, I Crossfield, R Dekany, JR Delorme, C Dong, R Dong, R Doyon, C Dressing, M Fitzgerald, J Fortney, R Frazin, E Gaidos, O Guyon, J Hashimoto, L Hillenbrand

The Mid-Infrared Search for Biosignatures on Temperate M-Dwarf Planets

Astro2020: Decadal Survey on Astronomy and Astrophysics 2020 (2019) 462-462

Authors:

Tiffany Kataria, Robert T Zellem, Jonathan J Fortney, Kevin B Stevenson, Luke Tremblay, Michael R Line, Caroline Morley, Sam Halverson, Tiffany Meshkat, Lee Armus, Jayne Birkby, Thomas M Evans, Thomas J Fauchez, Ravi Kopparapu, Klaus Pontoppidan, Thomas L Roellig, Robin Wordsworth, William C Danchi, Thomas Greene, Stephen R Kane, Itsuki Sakon, Keivan Stassun, Mark R Swain

What do astronomers want from the STFC?

Astronomy and Geophysics Oxford University Press 60:2 (2019) 2.13-2.17

Authors:

Stephen Serjeant, James Bolton, Poshak Gandhi, Christiane Helling, Paolo Mazzali, Ben Stappers, Yvonne Unruh, Aprajita Verma

Abstract:

Stephen Serjeant and the STFC's Astronomy Advisory Panel summarize community responses to its consultation on research priorities, undertaken in November 2018.
More details from the publisher
Details from ORA
More details