High-resolution observations of the solar photosphere, chromosphere, and transition region

A database of coordinated IRIS and SST observations

¹ Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029, Blindern, 0315 Oslo, Norway
e-mail: rouppe@astro.uio.no
² Rosseland Centre for Solar Physics, University of Oslo, PO Box 1029, Blindern, 0315 Oslo, Norway
³ Lockheed Martin Solar & Astrophysics Laboratory, 3251 Hanover St., Palo Alto, CA 94304, USA
⁴ Institute for Solar Physics, Dept. of Astronomy, Stockholm University, AlbaNova University Centre, 10691 Stockholm, Sweden
⁵ University Corporation for Atmospheric Research, Boulder, CO 80307-3000, USA
⁶ LPC2E, CNRS and University of Orléans, 3A avenue de la Recherche Scientifique, Orléans, France
⁷ Bay Area Environmental Research Institute, NASA Research Park, Moffett Field, CA 94035, USA
⁸ University of Applied Sciences and Arts Northwestern Switzerland, Bahnhofstrasse 6, 5210 Windisch, Switzerland
⁹ Leibniz-Institut für Sonnenphysik (KIS), Schöneckstrasse 6, D-79104 Freiburg, Germany
¹⁰ Stanford University, HEPL, 466 Via Ortega, Stanford, CA 94305-4085, USA
¹¹ Catholic University of America, Washington, DC 20064, USA
¹² NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
¹³ Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK

Received: 24 June 2020
Accepted: 21 July 2020

Abstract

NASA’s Interface Region Imaging Spectrograph (IRIS) provides high-resolution observations of the solar atmosphere through ultraviolet spectroscopy and imaging. Since the launch of IRIS in June 2013, we have conducted systematic observation campaigns in coordination with the Swedish 1 m Solar Telescope (SST) on La Palma. The SST provides complementary high-resolution observations of the photosphere and chromosphere. The SST observations include spectropolarimetric imaging in photospheric Fe I lines and spectrally resolved imaging in the chromospheric Ca II 8542 Å, Hα, and Ca II K lines. We present a database of co-aligned IRIS and SST datasets that is open for analysis to the scientific community. The database covers a variety of targets including active regions, sunspots, plages, the quiet Sun, and coronal holes.