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<p>The <span>Sunrise</span> balloon-borne solar observatory is equipped with a one-meter aperture optical telescope, offering a unique platform for uninterrupted seeing-free observations across ultraviolet, visible, and infrared wavelengths from altitudes higher than 33&#xa0;km. For the third flight of the upgraded <span>Sunrise</span> observatory conducted in 2024, now called <span>Sunrise iii</span>, a new spectro-polarimeter called the Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) was developed for observing near-infrared wavelength ranges around 770&#xa0;nm and 850&#xa0;nm. These wavelength ranges contain many spectral lines, including two of the Ca <span>ii</span> infrared triplet, K <span>i</span> D1 and D2 lines, and multiple Fe <span>i</span> lines, that are sensitive to solar magnetic fields and velocities in the photosphere and chromosphere. SCIP consists of a grating spectrograph in which polarimetric measurements are conducted using a rotating waveplate as a modulator and polarizing beam splitters placed in front of the cameras. The spatial and spectral resolutions are <InlineEquation ID="IEq1"> <EquationSource Format="MATHML"><math> <msup> <mn>0.21</mn> <mo>″</mo> </msup> </math></EquationSource> <EquationSource Format="TEX">$0.21''$</EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <EquationSource Format="MATHML"><math> <mn>1</mn> <mo>×</mo> <msup> <mrow> <mn>10</mn> </mrow> <mrow> <mn>5</mn> </mrow> </msup> </math></EquationSource> <EquationSource Format="TEX">$1\times10^{5}$</EquationSource> </InlineEquation>, respectively, and a polarimetric sensitivity of 0.03% (1<InlineEquation ID="IEq3"> <EquationSource Format="MATHML"><math> <mi>σ</mi> </math></EquationSource> <EquationSource Format="TEX">$\sigma$</EquationSource> </InlineEquation>) of the continuum intensity is achieved with a 10&#xa0;s integration time per a resolution element. To achieve high-precision detection of small polarization signals, we carefully designed the optical and mechanical systems, polarization components, control electronics, and onboard data processing. Together with the other post-focus instrumentation developed for <span>Sunrise iii</span>, the <span>Sunrise</span> Ultraviolet Spectropolarimeter and Imager (SUSI) and the Tunable Magnetograph (TuMag) visible imaging spectro-polarimeter, SCIP provides novel observations that help elucidate energy transfer and time-dependent phenomena across the solar photosphere and chromosphere.</p>

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The Sunrise Chromospheric Infrared Spectro-Polarimeter SCIP: An Instrument for SUNRISE III

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月3日

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  • Y. Katsukawa,
  • J. C. del Toro Iniesta,
  • S. K. Solanki,
  • M. Kubo,
  • H. Hara,
  • T. Shimizu,
  • T. Oba,
  • Y. Kawabata,
  • T. Tsuzuki,
  • F. Uraguchi,
  • K. Shinoda,
  • T. Tamura,
  • Y. Suematsu,
  • T. Matsumoto,
  • R. T. Ishikawa,
  • Y. Naito,
  • K. Ichimoto,
  • S. Nagata,
  • T. Anan,
  • D. Orozco Suárez,
  • E. Sanchis Kilders,
  • M. Balaguer Jiménez,
  • A. C. López Jiménez,
  • C. Quintero Noda,
  • D. Álvarez García,
  • J. L. Ramos Más,
  • J. P. Cobos Carrascosa,
  • P. Labrousse,
  • B. Aparicio del Moral,
  • A. Sánchez Gómez,
  • D. Hernández Expósito,
  • E. Bailón Martínez,
  • J. M. Morales Fernández,
  • A. Moreno Mantas,
  • A. Tobaruela,
  • I. Bustamante,
  • F. J. Bailén,
  • J. Blanco Rodríguez,
  • J. L. Gasent Blesa,
  • P. Rodríguez Martínez,
  • A. Ferreres,
  • D. Gilabert Palmer,
  • J. Piqueras Carreño,
  • I. Pérez Grande,
  • I. Torralbo,
  • A. Álvarez-Herrero,
  • A. Korpi-Lagg,
  • A. Gandorfer,
  • T. Berkefeld,
  • P. Bernasconi,
  • A. Feller,
  • T. L. Riethmüller,
  • H. N. Smitha,
  • V. Martínez Pillet,
  • B. Grauf,
  • A. Bell,
  • M. Carpenter

摘要

The Sunrise balloon-borne solar observatory is equipped with a one-meter aperture optical telescope, offering a unique platform for uninterrupted seeing-free observations across ultraviolet, visible, and infrared wavelengths from altitudes higher than 33 km. For the third flight of the upgraded Sunrise observatory conducted in 2024, now called Sunrise iii, a new spectro-polarimeter called the Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) was developed for observing near-infrared wavelength ranges around 770 nm and 850 nm. These wavelength ranges contain many spectral lines, including two of the Ca ii infrared triplet, K i D1 and D2 lines, and multiple Fe i lines, that are sensitive to solar magnetic fields and velocities in the photosphere and chromosphere. SCIP consists of a grating spectrograph in which polarimetric measurements are conducted using a rotating waveplate as a modulator and polarizing beam splitters placed in front of the cameras. The spatial and spectral resolutions are 0.21 ″ $0.21''$ and 1 × 10 5 $1\times10^{5}$ , respectively, and a polarimetric sensitivity of 0.03% (1 σ $\sigma$ ) of the continuum intensity is achieved with a 10 s integration time per a resolution element. To achieve high-precision detection of small polarization signals, we carefully designed the optical and mechanical systems, polarization components, control electronics, and onboard data processing. Together with the other post-focus instrumentation developed for Sunrise iii, the Sunrise Ultraviolet Spectropolarimeter and Imager (SUSI) and the Tunable Magnetograph (TuMag) visible imaging spectro-polarimeter, SCIP provides novel observations that help elucidate energy transfer and time-dependent phenomena across the solar photosphere and chromosphere.