Solar Physics

, Volume 249, Issue 2, pp 233–261

Polarization Calibration of the Solar Optical Telescope onboard Hinode

  • K. Ichimoto
  • B. Lites
  • D. Elmore
  • Y. Suematsu
  • S. Tsuneta
  • Y. Katsukawa
  • T. Shimizu
  • R. Shine
  • T. Tarbell
  • A. Title
  • J. Kiyohara
  • K. Shinoda
  • G. Card
  • A. Lecinski
  • K. Streander
  • M. Nakagiri
  • M. Miyashita
  • M. Noguchi
  • C. Hoffmann
  • T. Cruz
Article

Abstract

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 Stokes parameters is required to be suppressed below the level of the statistical noise over the SOT’s field of view. This goal was achieved by the highly optimized design of the SOT as a polarimeter, extensive analyses and testing of optical elements, and an end-to-end calibration test of the entire system. In this paper we review both the approach adopted to realize the high-precision polarimeter of the SOT and its final polarization characteristics.

Keywords

Polarimeter Stokes vector Space telescope Magnetic field Optical telescope Sun 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Elmore, D.F.: 1990, A polarization calibration technique for the advanced stokes polarimeter. NCAR Technical Note NCAR/TN-355+STR, NCAR, Boulder, Colorado. Google Scholar
  2. Guimond, S., Elmore, D.: 2004, OE Mag. 4(5), 26. Google Scholar
  3. Ichimoto, K., Tsuneta, S., Suematsu, Y., Shimizu, T., Otsubo, M., Kato, Y., et al.: 2004, In: Mather, J.C. (ed.) Optical, Infrared, and Millimeter Space Telescopes, Proc. SPIE 5487, 1142. Google Scholar
  4. Ichimoto, K., the Solar-B Team: 2005, J. Korean Astron. Soc. 38, 307. ADSGoogle Scholar
  5. Ichimoto, K., Shinoda, K., Yamamoto, T., Kiyohara, J.: 2006, Publ. Natl. Astron. Obs. Japan 8, 11. ADSGoogle Scholar
  6. Kosugi, T., Matsuzaki, K., Sakao, T., Shimizu, T., Sone, Y., Tachikawa, S., et al.: 2007, Solar Phys. 243, 3. CrossRefADSGoogle Scholar
  7. Shimizu, T.: 2004, In: Sakurai, T., Sekii, T. (eds.) The Solar-B Mission and the Forefront of Solar Physics CS-325, Astron. Soc. Pac., San Francisco, 3. Google Scholar
  8. Shimizu, T., Nagata, S., Edwards, C., Tarbell, T., Kashiwagi, Y., Kodeki, K., et al.: 2004, In: Mather, J.C. (ed.) Optical, Infrared, and Millimeter Space Telescopes, Proc. SPIE 5487, 1199. Google Scholar
  9. Shimizu, T., Nagata, S., Tsuneta, S., Tarbell, T., Edwards, C., Shine, R., et al.: 2008, Solar Phys. in press. Google Scholar
  10. Skumanich, A., Lites, B.W.: 1997, Astrophys. J. Suppl. 110, 357. CrossRefADSGoogle Scholar
  11. Suematsu, Y., Tsuneta, S., Ichimoto, K., Shimizu, T., Otsubo, M., Katsukawa, Y., et al.: 2008, Solar Phys. in press. Google Scholar
  12. Tarbell, T.D., et al.: 2008, Solar Phys. to be submitted. Google Scholar
  13. Tsuneta, S., Ichimoto, K., Katsukawa, Y., Shimizu, T., Otsubo, M., Nagata, S., et al.: 2008, Solar Phys. in press. Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • K. Ichimoto
    • 1
  • B. Lites
    • 2
  • D. Elmore
    • 2
  • Y. Suematsu
    • 1
  • S. Tsuneta
    • 1
  • Y. Katsukawa
    • 1
  • T. Shimizu
    • 4
  • R. Shine
    • 3
  • T. Tarbell
    • 3
  • A. Title
    • 3
  • J. Kiyohara
    • 5
  • K. Shinoda
    • 1
  • G. Card
    • 2
  • A. Lecinski
    • 2
  • K. Streander
    • 2
  • M. Nakagiri
    • 1
  • M. Miyashita
    • 1
  • M. Noguchi
    • 1
  • C. Hoffmann
    • 3
  • T. Cruz
    • 3
  1. 1.National Astronomical Observatory of JapanMitakaJapan
  2. 2.High Altitude ObservatoryNational Center for Atmospheric ResearchBoulderUSA
  3. 3.Lockheed Martin Advanced Technology CenterPalo AltoUSA
  4. 4.Japan Aerospace Exploration AgencyInstitute of Space and Astronautical ScienceSagamiharaJapan
  5. 5.Kwasan ObservatoryKyoto UniversityKyotoJapan

Personalised recommendations