output
19972026
most citedBasic physical parameters of a selected sample of evolved stars

492 citations

Showing astro-ph.IMShow all

26 papers · 1 filter

astro-ph.IM2026★ 7 cited

Sunrise III: The Wavefront Correction System

Thomas Berkefeld, Alexander Bell, Reiner Volkmer +19

This paper describes the wave-front correction and image stabilisation system (CWS) developed for the Sunrise III balloon-borne telescope, and provides information about its perfor…

astro-ph.IM2025

TuMag: the tunable magnetograph for the Sunrise III mission

J. C. del Toro Iniesta, D. Orozco Suárez, A. Álvarez-Herrero +61

One of the instruments aboard the Sunrise III mission, the Tunable Magnetograph (TuMag), is a tunable imaging spectropolarimeter in visible wavelengths. It is designed to probe the…

astro-ph.IM2025★ 32 cited

Sunrise III: Overview of Observatory and Instruments

Andreas Korpi-Lagg, Achim Gandorfer, Sami K. Solanki +117

In July 2024, Sunrise completed its third successful science flight. The Sunrise III observatory had been upgraded significantly after the two previous successful flights in 2009 a…

astro-ph.IM2022★ 27 cited

First light of the Integral Field Unit of GRIS on the GREGOR solar telescope

C. Dominguez-Tagle, M. Collados, R. Lopez +9

An Integral Field Unit (IFU) based on image-slicers has been added to the GREGOR Infrared Spectrograph (GRIS). This upgrade to the instrument makes possible 2D spectropolarimetry i…

astro-ph.IM2021★ 5 cited

UV Spectropolarimetry with Polstar: Protoplanetary Disks

John P. Wisniewski, Andrei V. Berdyugin, Svetlana V. Berdyugina +13

Polstar is a proposed NASA MIDEX mission that would feature a high resolution UV spectropolarimeter capable of measure all four Stokes parameters onboard a 60cm telescope. The miss…

astro-ph.IM2020★ 36 cited

GREGOR: Optics Redesign and Updates from 2018-2020

Lucia Kleint, Thomas Berkefeld, Miguel Esteves +6

The GREGOR telescope was inaugurated in 2012. In 2018, we started a complete upgrade, involving optics, alignment, instrumentation, mechanical upgrades for vibration reduction, upd…