The Imaging Magnetograph eXperiment (IMaX) for the Sunrise balloon-borne solar observatory
| Autor: | P. Mellado, M. Menendez, D. Orozco Suárez, J. M. Jeronimo, Ph. Rodriguez, Juan L. Ramos, B. Aparicio, W. Schmidt, J. C. del Toro Iniesta, V. Domingo, C. Pastor, A. C. López Jiménez, Sami K. Solanki, R. Morales, Alberto Álvarez-Herrero, Javier Piqueras, R. L. Heredero, V. Martínez Pillet, W. Deutsch, M. Knoelker, Peter Barthol, Achim Gandorfer, R. Meller, Alex Feller, Thomas Berkefeld, L. R. Bellot Rubio, J. L. Gasent Blesa, F. Girela, M. Reina, J. A. Bonet, Tomás Belenguer, E. Ballesteros, S. Vargas Domínguez, A. Sánchez, M. Balaguer, M. Herranz, H. Laguna, Manuel Collados, B. Grauf, L. González Fernández, Néstor Uribe-Patarroyo, Gonzalo Ramos |
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| Přispěvatelé: | López Heredero, R. [0000-0002-2197-8388], López Jiménez, A. [0000-0002-6297-0681], Balaguer, M. [0000-0003-4738-7727], Del Toro Iniesta, J. C. [0000-0002-3387-026X], Reina Aranda, M. [0000-0003-0248-2771], Álvarez Herrero, A. [0000-0001-9228-3412], Herranz de la Revilla, M. L. [0000-0003-4343-6632], Morales Muñoz, R. [0000-0003-1661-0594], Pastor, C. [0000-0001-9631-9558], Gasent Blesa, J. L. [0000-0002-1225-4177], Collados, M. [0000-0002-6210-9648], Jerónimo, J. M. [0000-0002-4944-5823], Bellot Rubio, L. R. [0000-0001-8669-8857], Martínez Pillet, V. [0000-0001-7764-6895], Ministerio de Ciencia e Innovación (MICINN), Deutsches Zentrum für Luft- und Raumfahrt (DLR), National Aeronautics and Space Administration (NASA) |
| Rok vydání: | 2010 |
| Předmět: |
Physics
Solar observatory Polarimetry Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Polarimeter Astronomy and Astrophysics Astrophysics Spectral line Integrated Sun Observations Polarization symbols.namesake Wavelength Magnetic Fields Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Velocity Fields symbols Stokes parameters Astrophysics::Solar and Stellar Astrophysics Instrumentation and Data Management Spectral resolution Spectrograph Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial Universitat Pompeu Fabra |
| DOI: | 10.48550/arxiv.1009.1095 |
| Popis: | The Imaging Magnetograph eXperiment (IMaX) is a spectropolarimeter built by four institutions in Spain that flew on board the Sunrise balloon-borne telesocope in June 2009 for almost six days over the Arctic Circle. As a polarimeter IMaX uses fast polarization modulation (based on the use of two liquid crystal retarders), real-time image accumulation, and dual beam polarimetry to reach polarization sensitivities of 0.1%. As a spectrograph, the instrument uses a LiNbO3 etalon in double pass and a narrow band pre-filter to achieve a spectral resolution of 85 mAA. IMaX uses the high Zeeman sensitive line of Fe I at 5250.2 AA and observes all four Stokes parameters at various points inside the spectral line. This allows vector magnetograms, Dopplergrams, and intensity frames to be produced that, after reconstruction, reach spatial resolutions in the 0.15-0.18 arcsec range over a 50x50 arcsec FOV. Time cadences vary between ten and 33 seconds, although the shortest one only includes longitudinal polarimetry. The spectral line is sampled in various ways depending on the applied observing mode, from just two points inside the line to 11 of them. All observing modes include one extra wavelength point in the nearby continuum. Gauss equivalent sensitivities are four Gauss for longitudinal fields and 80 Gauss for transverse fields per wavelength sample. The LOS velocities are estimated with statistical errors of the order of 5-40 m/s. The design, calibration and integration phases of the instrument, together with the implemented data reduction scheme are described in some detail. Comment: 17 figures |
| Databáze: | OpenAIRE |
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