First Results from the Swedish 1-m Solar Telescope

Göran B. Scharmer, Dan Kiselman, Mats G. Löfdahl & Luc H. M. Rouppe
van der Voort

To Appear in Proc. Third International Workshop on Solar Polarization,
Tenerife, Spain, 2002, Eds. J. Trujillo Bueno & J. Sánchez Almeida.,
ASP Conference Series

 

Abstract:

  We describe the Swedish 1-m Solar Telescope (SST) on La Palma which
  has twice as large aperture as the previous SVST.  The un-obscured
  optics consists of a singlet lens used as vacuum window and
  secondary optics. The secondary optics uses a field mirror to
  re-image the pupil on a 25 cm corrector which provides a perfectly
  achromatic image, compensated also for atmospheric dispersion.  The
  adaptive optics system consists of a low-order bimorph modal mirror
  with 37 electrodes, allowing near-diffraction-limited imaging a
  reasonable fraction of the observing time on La Palma.  The new
  telescope became operational on 21 May 2002 and has quickly proven
  to be the most highly resolving solar telescope ever built. In this
  paper, we describe its design, the instrumentation in use or planned
  for this telescope and present first results based on observations
  made in May-July 2002.