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Calibrating Data from the Hinode/X-Ray Telescope and Associated Uncertainties

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Abstract

The X-Ray Telescope (XRT) onboard the Hinode satellite, launched 23 September 2006 by the Japan Aerospace Exploration Agency (JAXA), is a joint mission of Japan, the United States, and the United Kingdom to study the solar corona. In particular, XRT was designed to study solar plasmas with temperatures between 1 and 10 MK with ≈ 1″ pixels (≈ 2″ resolution). Prior to analysis, the data product from this instrument must be properly calibrated and data values quantified to accurately assess the information contained within. We present here the standard methods of calibration for these data. The calibration was performed on an empirical basis that uses the least complicated correction that accurately describes the data while suppressing spurious features. By analyzing the uncertainties remaining in the data after calibration, we conclude that the procedure is successful, because the remaining uncertainty after calibration is dominated by photon noise. This calibration software is available in the SolarSoft software library.

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Acknowledgements

Hinode is a Japanese mission developed and launched by ISAS/JAXA, collaborating with NAOJ as a domestic partner, and with NASA and STFC (UK) as international partners. Scientific operation of the Hinode mission is conducted by the Hinode science team organized at ISAS/JAXA. This team mainly consists of scientists from institutes in the partner countries. Support for the post-launch operation is provided by JAXA and NAOJ (Japan), STFC (U.K.), NASA, ESA, and NSC (Norway). This work was supported by NASA under contract NNM07AB07C with the Smithsonian Astrophysical Observatory.

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Authors and Affiliations

  1. Montana State University, P.O. Box 173840, Bozeman, MT, 59717, USA

    Adam R. Kobelski & David E. McKenzie

  2. Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA, 02138, USA

    Steven H. Saar, Mark A. Weber & Katharine K. Reeves

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  1. Adam R. Kobelski
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  2. Steven H. Saar
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  3. Mark A. Weber
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  4. David E. McKenzie
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  5. Katharine K. Reeves
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Correspondence to Adam R. Kobelski.

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Kobelski, A.R., Saar, S.H., Weber, M.A. et al. Calibrating Data from the Hinode/X-Ray Telescope and Associated Uncertainties. Sol Phys 289, 2781–2802 (2014). https://doi.org/10.1007/s11207-014-0487-9

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  • DOI: https://doi.org/10.1007/s11207-014-0487-9

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