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HRTS Evidence for Rotation of Transition Region Temperature Spicules

  • J.W. Cook (a1), G.E. Brueckner (a1), J.-D.F. Bartoe (a1) and D.G. Socker (a1)

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The HRTS (High Resolution Telescope and Spectrograph) instrument is a high spectral (0.05 Å) and spatial (<1 arc sec) resolution spectrograph with a slit length of 900 arc sec on the solar disk (see Bartoe and Brueckner 1975, 1978). HRTS contains in addition a double grating, zero dispersion broadband spectroheliograph which images the spectrograph slit jaw plate (see Cook et al. 1983). The central wavelength is tunable by changing the grating geometry. Hα images are also photographed from the slit jaw plate image. HRTS has been flown four times as a rocket payload, and will fly in April 1985 as one of the solar experiments aboard Spacelab 2. The four rocket flights of the HRTS program have each been customized for a particular scientific objective. For the fourth flight, because the original hardware was utilized as the basis of the Spacelab HRTS, the opportunity was used to design and build a new rocket HRTS instrument specialized for observations at the solar limb. In this configuration the photographic speed was increased, a new curved slit was fabricated, and the spectroheliograph was modified for limb observations. The scientific observing program was a study of structure and short term temporal evolution at the limb, with a comparison of quiet and coronal hole areas.

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References

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Bartoe, J.-D.F., and Brueckner, G.E. 1975, J. Opt. Soc. Am., 65, 13.
Bartoe, J.-D.F., and Brueckner, G.E. 1978, in New Instrumentation for Space Astronomy, ed. Van der Hucht, K. and Vaiana, G.S. (Oxford: Pergamon), p. 81.
Bray, R.J., and Loughhead, R.E. 1974, The Solar Chromosphere (London: Chapman and Hall), pp. 5860.
Cook, J.W., Brueckner, G.E., and Bartoe, J.-D.F. 1983, Ap. J. (Letters), 270, L89.
Sterling, A.C., and Hollweg, J.V. 1984, Alfvenie Resonances on Solar Spicules, Ap. J., in press.

HRTS Evidence for Rotation of Transition Region Temperature Spicules

  • J.W. Cook (a1), G.E. Brueckner (a1), J.-D.F. Bartoe (a1) and D.G. Socker (a1)

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