Contributed Talk - Splinter ATNG

Thursday, 14 September 2023, 14:45   (H 2036)

Wide-field linear optical polarization measurements with an array of small telescopes

Anna Franckowiak, Vandad Fallah Ramazani, Sven Weimann
Ruhr-University Bochum

The Large Array Survey Telescope (LAST) is a photometric survey instrument designed to explore the variable and transient sky. A LAST node of 48, 28-cm f/2.2 telescopes equipped with full-frame, backside-illuminated, cooled CMOS detectors is currently under construction in the Israeli Negev desert. The telescopes are mounted on 12 separate mounts, each carrying four telescopes. Each telescope provides a field of view of 7.4 square degrees. We modified the LAST design by adding four linear polarization filters rotated by 45 deg relative to each other. All four telescopes observe the same patch of the sky and provide polarization degree and angle measurements for all sources in the field of view. We present first results of polarization measurements of standard stars with a four telescope prototype.