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The Solar Optical Telescope for the Hinode Mission: An Overview
Ichimoto, K.; Tsuneta, S.; Suematsu, Y. +22 more
The Solar Optical Telescope (SOT) aboard the Hinode satellite (formerly called Solar-B) consists of the Optical Telescope Assembly (OTA) and the Focal Plane Package (FPP). The OTA is a 50-cm diffraction-limited Gregorian telescope, and the FPP includes the narrowband filtergraph (NFI) and the broadband filtergraph (BFI), plus the Stokes Spectro-Po…
The Solar Optical Telescope of Solar-B ( Hinode): The Optical Telescope Assembly
Kubo, M.; Ichimoto, K.; Tsuneta, S. +18 more
The Solar Optical Telescope (SOT) aboard the Solar-B satellite (Hinode) is designed to perform high-precision photometric and polarimetric observations of the Sun in visible light spectra (388 - 668 nm) with a spatial resolution of 0.2 - 0.3 arcsec. The SOT consists of two optically separable components: the Optical Telescope Assembly (OTA), consi…
Polarization Calibration of the Solar Optical Telescope onboard Hinode
Ichimoto, K.; Tsuneta, S.; Suematsu, Y. +17 more
The Solar Optical Telescope (SOT) onboard Hinode aims to obtain vector magnetic fields on the Sun through precise spectropolarimetry of solar spectral lines with a spatial resolution of 0.2 - 0.3 arcsec. A photometric accuracy of 10−3 is achieved and, after the polarization calibration, any artificial polarization from crosstalk among S…
Image Stabilization System for Hinode (Solar-B) Solar Optical Telescope
Ichimoto, K.; Kobayashi, K.; Tsuneta, S. +16 more
The Hinode Solar Optical Telescope (SOT) is the first space-borne visible-light telescope that enables us to observe magnetic-field dynamics in the solar lower atmosphere with 0.2 - 0.3 arcsec spatial resolution under extremely stable (seeing-free) conditions. To achieve precise measurements of the polarization with diffraction-limited images, sta…
Origin of Coronal Shock Waves. Invited Review
Vršnak, Bojan; Cliver, Edward W.
The basic idea of the paper is to present transparently and confront two different views on the origin of large-scale coronal shock waves, one favoring coronal mass ejections (CMEs), and the other one preferring flares. For this purpose, we first review the empirical aspects of the relationship between CMEs, flares, and shocks (as manifested by ra…
Nonlinear Force-Free Modeling of Coronal Magnetic Fields. II. Modeling a Filament Arcade and Simulated Chromospheric and Photospheric Vector Fields
Wiegelmann, Thomas; Schrijver, Carolus J.; Valori, Gherardo +6 more
We compare a variety of nonlinear force-free field (NLFFF) extrapolation algorithms, including optimization, magneto-frictional, and Grad - Rubin-like codes, applied to a solar-like reference model. The model used to test the algorithms includes realistic photospheric Lorentz forces and a complex field including a weakly twisted, right helical flu…
A New Model for Propagating Parts of EIT Waves: A Current Shell in a CME
Aulanier, G.; Török, T.; Hochedez, J. -F. +1 more
EIT waves are observed in EUV as bright fronts. Some of these bright fronts propagate across the solar disk. EIT waves are all associated with a flare and a CME and are commonly interpreted as fast-mode magnetosonic waves. Propagating EIT waves could also be the direct signature of the gradual opening of magnetic field lines during a CME. We quant…
Automatic Detection and Tracking of Coronal Mass Ejections in Coronagraph Time Series
Zhang, J.; Olmedo, O.; Poland, A. +2 more
We present the current capabilities of a software tool to automatically detect coronal mass ejections (CMEs) based on time series of coronagraph images: the solar eruptive event detection system (SEEDS). The software developed consists of several modules: preprocessing, detection, tracking, and event cataloging. The detection algorithm is based on…
The Hinode X-Ray Telescope (XRT): Camera Design, Performance and Operations
Weber, M.; Golub, L.; Kano, R. +15 more
The X-ray Telescope (XRT) aboard the Hinode satellite is a grazing incidence X-ray imager equipped with a 2048×2048 CCD. The XRT has 1 arcsec pixels with a wide field of view of 34×34 arcmin. It is sensitive to plasmas with a wide temperature range from < 1 to 30 MK, allowing us to obtain TRACE-like low-temperature images as well as Yohkoh/SXT-…
Radio Emission of Flares and Coronal Mass Ejections. Invited Review
Klein, K. -L.; Nindos, A.; Aurass, H. +1 more
We review recent progress on our understanding of radio emission from solar flares and coronal mass ejections (CMEs) with emphasis on those aspects of the subject that help us address questions about energy release and its properties, the configuration of flare - CME source regions, coronal shocks, particle acceleration and transport, and the orig…